• I broke my PC

    From deepthaw@21:1/112 to ALL on Tuesday, January 28, 2020 22:42:42
    Shortly after getting a nice DOSBox replica of my circa early 90's
    BBSing setup, my son managed to pull the monitor off my desk onto the tower, breaking the monitor and causing the hard drive to crash.

    Used this as an opportunity to do some hardware upgrades, so it's good as new except faster. Didn't feel like the effort of setting up that particular
    DOSBox setup again so I didn't do much BBSing.

    Come Christmas day, I find somebody selling an Apple IIe with monitor and DuoDisk and a printer for $70 on Facebook Marketplace. Score.

    I've since replaced some memory that had gone bad, installed an enhancement
    kit and gotten it BBSing via tcpser on a Raspberry Pi. Fun stuff.

    So, I'm back, both in DOSBox and from my Apple IIe tucked away in the basement.

    I think I may have a reason to put a BBS back up as well. There are some Apple II bbs's out there (Captain's Quarters is actually pretty active) but the
    old girl just can't manage these fancy new-fangled ANSI BBS's with their "directional keys" and "pageups."

    So I might set up a Mystic system that's ascii only, geared towards people connecting from very vintage hardware. That'd also let me browse these echoes from my Apple II.

    Oh yeah, and I'm playing Wizardry 1. This game's hard.

    ... Documentation - The worst part of programming.
    ___ Blue Wave/386 v2.30

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    * Origin: Black Flag <ACiD Telnet HQ> blackflagbbs.com (21:1/112)
  • From Spectre@21:3/101 to deepthaw on Wednesday, January 29, 2020 17:51:00
    Come Christmas day, I find somebody selling an Apple IIe with monitor and DuoDisk and a printer for $70 on Facebook Marketplace. Score.

    Nice score. What are you using for terminal software on the beast? Is it enhanced or unenhanced? If enhanced and you're having trouble with ANSI, then ProTERM, or AGATE are your best friends.

    Agate is prettier, still black and white, but uses different fonts in place of colours it can cope with CP437 characters though. On the downside if your serial port is running hot at 9600 it probably won't keep up very well.

    ProTERM is much faster, but it doesn't try to be to pretty, you've just got plain 80col normal/inverse text with Apple ASCII. But the emulation is solid as far as it goes.

    Out interest you get a green monitot II with it? They seem to have been the rage in schools with that very setup..

    Spec


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  • From deepthaw@21:1/112 to SPECTRE on Thursday, January 30, 2020 20:19:03
    Quoting Spectre to Deepthaw <=-

    Come Christmas day, I find somebody selling an Apple IIe with monitor and DuoDisk and a printer for $70 on Facebook Marketplace. Score.

    Nice score. What are you using for terminal software on the beast?
    Is it enhanced or unenhanced? If enhanced and you're having trouble
    with ANSI, then ProTERM, or AGATE are your best friends.

    Was unenhanced when I got it, but got an enhacement kit off eBay and got that installed yesterday. Presently running ProTERM, will have to give AGATE a spin.

    Out interest you get a green monitot II with it? They seem to have
    been the rage in schools with that very setup..

    Yep - at first I thought the tube was loose because I didn't realize you were supposed to be able to tilt it within the frame like that.

    I'm surprised with just how sharp these old monitors can be, but from my reading that's because monochrome signals are just cleaner than color due
    to how NTSC retrofit color into it (and the hacky way Apple II does color as well...)

    ... I know a good tagline when I steal one.
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  • From Phoobar@21:2/147 to deepthaw on Friday, January 31, 2020 16:44:02
    to how NTSC retrofit color into it (and the hacky way Apple II does
    color as well...)

    Forgot to add that while the US still has a different standard than the rest
    of the world. Add onto that digital radio which is still the same...while the UK runs DAB signals...while many US stations might have information about the tune being played...but none of the other aspects DAB would afford because station owners don't want to pony up for the equipment or force the listeners to buy updated equipment.

    Myself...one of the things I wanted when I got my LG K450 was an FM radio. Apple & others refuse to activate the FM chip which is there to be able to
    keep their users tied into their paid music systems.

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  • From Oli@21:1/151 to Phoobar on Saturday, February 01, 2020 07:06:48
    of the world. Add onto that digital radio which is still the same...while
    the
    UK runs DAB signals...while many US stations might have information about
    the
    tune being played...but none of the other aspects DAB would afford because station owners don't want to pony up for the equipment or force the
    listeners
    to buy updated equipment.

    DAB is onsolete useless technology. Worse quality than FM radio or some decent bitrate
    internet stream. I would never buy a DAB radio for listening to lossy audio encoded at
    64 kbps.

    --- CENSORED v0.00 ABC
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  • From Phoobar@21:2/147 to Oli on Saturday, February 01, 2020 06:13:07
    DAB is onsolete useless technology. Worse quality than FM radio or some decent bitrate
    internet stream. I would never buy a DAB radio for listening to lossy audio encoded at
    64 kbps.

    You have described satellite radio here in the states to a tee. Not having access...except for what I've read in the past about DAB...had no idea on the quality.

    ACME BBS-Member of fsxNet/WWIVNet/SciNet/SpookNet/FidoNet/MicroNet.

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  • From poindexter FORTRAN@21:4/122 to Phoobar on Saturday, February 01, 2020 07:50:00
    Phoobar wrote to Oli <=-

    You have described satellite radio here in the states to a tee. Not
    having access...except for what I've read in the past about DAB...had
    no idea on the quality.

    When I bought my car in 2014, it came with 6 months of Sirius service. Satellite radio seemed like the best dead tech I'd seen - dozens of channels available with no control over content.

    My car also came with Pandora, which got much more usage.


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  • From Oli@21:1/151 to Phoobar on Saturday, February 01, 2020 20:01:27
    01 Feb 20 06:13, you wrote to me:

    DAB is onsolete useless technology. Worse quality than FM radio or some
    decent bitrate
    internet stream. I would never buy a DAB radio for listening to lossy
    audio encoded at
    64 kbps.

    You have described satellite radio here in the states to a tee. Not having access...except for what I've read in the past about DAB...had no idea on
    the
    quality.

    AFAIK the standard supports also higher bitrates, but of course they try to broadcast as many channels as possible and bandwith is limited. Most people don't hear it or care
    about the sound quality, but my ears prefer FM radio even with background noise
    or in mono. I'm not an analog freak, I'm just convinced that you canot throw 94% percent of
    the
    information away and still have good sounding music.

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  • From Spectre@21:3/101 to Oli on Sunday, February 02, 2020 08:20:00
    DAB is onsolete useless technology. Worse quality than FM radio or

    We got stuck with DAB+ over here. At the time it was legislated there was no -one else in the world using it. I have no idea what its uptake is like, I still don't own a DAB+ radio, the only ones around seem to be made like some 80's $5 shop style of quality. Still only got FM in the car, at some point they're meant to be switching FM off, it'll be interesting to see what happens then. I suspect transmission will fall on its arse and they'll be primarily streaming, which is the other thing they're already doing.

    Spec


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  • From Phoobar@21:2/147 to poindexter FORTRAN on Saturday, February 01, 2020 21:38:15
    Satellite radio seemed like the best dead tech I'd seen - dozens of channels available with no control over content.
    My car also came with Pandora, which got much more usage.

    Was great when you're out in the middle of nowhere (Texas panhandle) so you don't have to listen to static & religious AM stations.

    Before they got hooked onto geolocation...used to stream Absolute Radio/Radio Luxembourg on my phone to an FM transmitter dongle to my radio. Hate it that
    I can't listen to UK radio anymore.

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  • From Phoobar@21:2/147 to Oli on Saturday, February 01, 2020 22:11:48
    about the sound quality, but my ears prefer FM radio even with
    background noise or in mono. I'm not an analog freak, I'm just convinced that you canot throw 94% percent of
    the
    information away and still have good sounding music.

    Fully understand. When I was working at my last set of stations in Western Arizona...most of the music was on CD's...with a few cuts on cart. Fool you not...listen to something done on an analog format...then list to it as a digital file. So easy to hear what the digital has cut out. Sounds much more fuller & not chopped up into discrete pieces.

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  • From Vk3jed@21:1/109 to Spectre on Sunday, February 02, 2020 21:57:00
    On 02-02-20 08:20, Spectre wrote to Oli <=-

    DAB is onsolete useless technology. Worse quality than FM radio or

    We got stuck with DAB+ over here. At the time it was legislated there
    was no -one else in the world using it. I have no idea what its uptake
    is like, I still don't own a DAB+ radio, the only ones around seem to
    be made like some 80's $5 shop style of quality. Still only got FM in
    the car, at some point they're meant to be switching FM off, it'll be interesting to see what happens then. I suspect transmission will fall
    on its arse and they'll be primarily streaming, which is the other
    thing they're already doing.

    I have a DAB+ capable radio, but there's no DAB+ out here (a scan revealed no signals). It still seems confined to the capital cities. It's not the radio or antenna, I'm receiving FM stations fine on it.


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  • From Oli@21:1/151 to Phoobar on Sunday, February 02, 2020 16:02:50
    01 Feb 20 22:11, you wrote to me:

    about the sound quality, but my ears prefer FM radio even with
    background noise or in mono. I'm not an analog freak, I'm just convinced
    that you canot throw 94% percent of
    the
    information away and still have good sounding music.

    Fully understand. When I was working at my last set of stations in Western Arizona...most of the music was on CD's...with a few cuts on cart. Fool
    you
    not...listen to something done on an analog format...then list to it as a digital file. So easy to hear what the digital has cut out. Sounds much
    more
    fuller & not chopped up into discrete pieces.

    I think we disagree on that matter :). I bought my first CD player in the 80s and it
    was a revelation. Uncompressed digital audio is so much better than Vinyl and you can
    make identical copies without any degradation.

    Lossy audio compression is a different story (it's called lossy for a reason). Some analog noise and inaccuracies are less annoying than digital artifacts from lossy
    compression.

    There are also many ways to make digitally recorded, mixed and/or mastered music sound
    shitty. bad resampling, dynamic range compression (loudness war), etc. This is the
    reason that some albums sound better on LP than on CD. It's not thst analog is better
    than digital, they just messed up the digital version.

    Also most contemporary music is digitally recorded or processed in some way even if you
    buy the LP, so the Vinyl copy cannot be more accurate than the direct digital copy.











    --- CENSORED v0.00 ABC
    * Origin: 🦄 🌈 (21:1/151)
  • From poindexter FORTRAN@21:4/122 to Phoobar on Sunday, February 02, 2020 07:37:00
    Phoobar wrote to poindexter FORTRAN <=-

    Before they got hooked onto geolocation...used to stream Absolute Radio/Radio Luxembourg on my phone to an FM transmitter dongle to my radio. Hate it that I can't listen to UK radio anymore.

    Recreating legacy limitations. How quaint.

    Reminds me of the story of Sony doing a movie premiere in Second Life back when it first came out. People had to queue up to go through turnstiles to
    get in. Physical limitations where there are none.


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  • From poindexter FORTRAN@21:4/122 to Phoobar on Sunday, February 02, 2020 07:55:00
    Phoobar wrote to Oli <=-

    format...then list to it as a digital file. So easy to hear what the digital has cut out. Sounds much more fuller & not chopped up into discrete pieces.

    Don't get me started on listening to "remastered" versions of classic albums where the gain is cranked up to 11 and all of the detail is lost/clipped.


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  • From Phoobar@21:2/147 to Oli on Sunday, February 02, 2020 12:25:31
    I think we disagree on that matter :). I bought my first CD player in
    the 80s and it
    was a revelation. Uncompressed digital audio is so much better than

    Remember when I was in college in '83 (graduated in '84) & a buddy had a
    Denon system he had built. 1st time I'd come across CD's. Loved the sound.

    In terms of uncompressed digital audio...not even sure I've heard it...except in FLAC.

    Lossy audio compression is a different story (it's called lossy for a reason). Some analog noise and inaccuracies are less annoying than
    digital artifacts from lossy
    compression.

    Totally agree with you. Had to encode the music from CD for the on-air system at 48K/320 to get it sounding "decent" for the system. Myself...do 48K/192
    for my personal stuff...even audio books.

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  • From Phoobar@21:2/147 to poindexter FORTRAN on Sunday, February 02, 2020 12:36:01
    Before they got hooked onto geolocation...used to stream Absolute Radio/Radio Luxembourg on my phone to an FM transmitter dongle to my radio. Hate it that I can't listen to UK radio anymore.
    Recreating legacy limitations. How quaint.

    Best thing I could do for a '95 Ford with a bad fuel pump. Eventually got it
    to Arizona on a 16 hour road trip at 55 MPH most of the way.

    ACME BBS-Member of fsxNet/WWIVNet/SciNet/SpookNet/FidoNet/MicroNet.

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  • From Phoobar@21:2/147 to poindexter FORTRAN on Sunday, February 02, 2020 12:42:38
    Don't get me started on listening to "remastered" versions of classic albums where the gain is cranked up to 11 and all of the detail is lost/clipped.

    We shouldn't complain...some of the artists need the sales to keep themselves in the lifestyle they've come to expect. ;)

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  • From Vk3jed@21:1/109 to Oli on Monday, February 03, 2020 10:25:00
    On 02-02-20 16:02, Oli wrote to Phoobar <=-

    I think we disagree on that matter :). I bought my first CD player in
    the 80s and it
    was a revelation. Uncompressed digital audio is so much better than
    Vinyl and you can
    make identical copies without any degradation.

    I'm inclined to agree with you. However, there has been one issue with CD quality digital audio that was noticed after the format gained popularity. CDs can sound "harsh". One reason given was because of the sharp cut off above 20 kHz, required to prevent aliasing. Whether it's because of the phase shifts of the sharp filters required (passband 0-20000 Hz, stopband 24100 Hz and above), or the lack of ultrasonic components (unnatural in nature), it's been proven in listening tests.

    One manufacturer of CD players did release a model which deliberately allowed some of that energy above 24 kHz to leak through, and it was said to sound less harsh. However, today, there is a simpler solution - use a higher sampling rate. 48 kHz is common as mud on non CD audio, and 96 kHz or higher is commonly available. Problem solved! :) Oversampling can also eliminate phase shifts caused by anti aliasing filters in both the recording and playback chains. On the recording side, sample at a high samnple rate, then filter digitally to remove components above 20 kHz.

    On the playback side, interpolate to a high sample rate, filter digitally, before going to the DAC. Then a simply analog filter will clean up the aliasing left (which will be at high frequencies, well separated from the audio).

    Lossy audio compression is a different story (it's called lossy for a reason). Some analog noise and inaccuracies are less annoying than
    digital artifacts from lossy
    compression.

    That is true. Overdo l,ossy compression and it sounds crap. Some people are also extremely sensitive to lossy compression. I'm "moderately sensitive" in that I can pick up a lot that most people miss, but I do know people much more sensitive than me, that I've had to use FLAC with for any critcal listening, because even 320k MP3 was too lossy for them. For me, 192k is usually acceptable for general listening, though I can sometimes hear artifacts at this bitrate. I also seem to not do as well with AAC as MP3 sometimes, so I'm probably more sensitive to what AAC removes, despite the fact it's supposed to be "better". :)

    There are also many ways to make digitally recorded, mixed and/or
    mastered music sound
    shitty. bad resampling, dynamic range compression (loudness war), etc. This is the
    reason that some albums sound better on LP than on CD. It's not thst analog is better
    than digital, they just messed up the digital version.

    Digital can bring out all the imperfections in a recording. This was also noticed in the early days of CDs.

    Also most contemporary music is digitally recorded or processed in some way even if you
    buy the LP, so the Vinyl copy cannot be more accurate than the direct digital copy.

    True, and one specification that was never released for analog media was intermodulation, because that spec was AWFUL in those days, in the order of a few percent. Uncompressed digital recordings have an IM comparable to, if not lower than the audio amplifiers following the DAC (0.001% or less).


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  • From Vk3jed@21:1/109 to poindexter FORTRAN on Monday, February 03, 2020 10:28:00
    On 02-02-20 07:37, poindexter FORTRAN wrote to Phoobar <=-

    Phoobar wrote to poindexter FORTRAN <=-

    Before they got hooked onto geolocation...used to stream Absolute Radio/Radio Luxembourg on my phone to an FM transmitter dongle to my radio. Hate it that I can't listen to UK radio anymore.

    Recreating legacy limitations. How quaint.

    Common with streaming media, because of antiquated licencing laws and practices. Video from old school broadcasters is the worst. Try accessing BBC streaming from outside the UK or ABC iView from outside Australia (without using a VPN, of course).

    Reminds me of the story of Sony doing a movie premiere in Second Life
    back when it first came out. People had to queue up to go through turnstiles to get in. Physical limitations where there are none.

    Now that's a different kettle of fish.


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  • From Vk3jed@21:1/109 to poindexter FORTRAN on Monday, February 03, 2020 10:29:00
    On 02-02-20 07:55, poindexter FORTRAN wrote to Phoobar <=-

    Don't get me started on listening to "remastered" versions of classic albums where the gain is cranked up to 11 and all of the detail is lost/clipped.

    That's just crappy remastering. It's going to sound shit on any medium. :D


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  • From Vk3jed@21:1/109 to Phoobar on Monday, February 03, 2020 10:33:00
    On 02-02-20 12:25, Phoobar wrote to Oli <=-

    Remember when I was in college in '83 (graduated in '84) & a buddy had
    a Denon system he had built. 1st time I'd come across CD's. Loved the sound.

    In terms of uncompressed digital audio...not even sure I've heard it...except in FLAC.

    You have, on those CDs. ;)

    Totally agree with you. Had to encode the music from CD for the on-air system at 48K/320 to get it sounding "decent" for the system.
    Myself...do 48K/192 for my personal stuff...even audio books.

    I'm fairly flexible. CDs, I'll rip to 320k for general use. If I want to keep master copies, I'll use FLAC. For speech, it depends on the exact content, but I will go a lot lower in bitrate, because I'm not converned about fidelity.


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  • From Phoobar@21:2/147 to Vk3jed on Sunday, February 02, 2020 20:43:50
    In terms of uncompressed digital audio...not even sure I've heard it...except in FLAC.
    You have, on those CDs. ;)

    Okay...never considered that until now. With the way it was explained to me back in the day...digital is sampled...so you're not hearing the complete
    wave. Can't believe I've been wrong all these years.

    I'm fairly flexible. CDs, I'll rip to 320k for general use. If I want

    The rule at the station was 320. Tried to bring in OGG...but was told to only use MP3 because that was the "standard".

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  • From Vk3jed@21:1/109 to Phoobar on Monday, February 03, 2020 16:44:00
    On 02-02-20 20:43, Phoobar wrote to Vk3jed <=-

    In terms of uncompressed digital audio...not even sure I've heard it...except in FLAC.
    You have, on those CDs. ;)

    Okay...never considered that until now. With the way it was explained
    to me back in the day...digital is sampled...so you're not hearing the complete wave. Can't believe I've been wrong all these years.

    Digital is sampled, but it is an accurate representation of the analog signal for frequencies up to 1/2 of the samiling frequency (the "Nyquist limit"). Actually, that's not the only scenario, but it's the one relevant to digital audio. Side note: it's possible to sccurately represent a set of frequencies higher than the sampling frequency, provided the bandwidth is less than 1/2 of the sample rate. This effect has been used at RF frequencies to sample a frequency band that's actually above the sampling frequency. But I digress. :)

    In the practical real world, the Nyquist limit is never reached, because real world filters (required for removing aliasing) have a finite transition from the passband to the stop band.

    I'm fairly flexible. CDs, I'll rip to 320k for general use. If I want

    The rule at the station was 320. Tried to bring in OGG...but was told
    to only use MP3 because that was the "standard".

    Not all hardware based devices support OGG. MP3 is the safest bet for "universal" playback. :)


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  • From Spectre@21:3/101 to Vk3jed on Monday, February 03, 2020 18:30:00
    Not all hardware based devices support OGG. MP3 is the safest bet for "universal" playback. :)

    Sounds like I've had the bull by the horns, but I thought (ow) that ogg was playable as an mp3... ponder... I've never used it myself, which probably shows. I thought it was a different rendering algorithm to an mp3 container.

    Ahh dem good ol' days when everyone one busy arguing the pros and cons of bog standard mp3 and bit rates vs ogg and I think flac at the time... I just stuck with mp3, didn't see the point in trying to convert to format to keep up, you're not going to improve it, and you're at the mercy of yet another level adaption.

    Spec


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  • From Vk3jed@21:1/109 to Spectre on Monday, February 03, 2020 19:12:00
    On 02-03-20 18:30, Spectre wrote to Vk3jed <=-

    Not all hardware based devices support OGG. MP3 is the safest bet for "universal" playback. :)

    Sounds like I've had the bull by the horns, but I thought (ow) that ogg was playable as an mp3... ponder... I've never used it myself, which probably shows. I thought it was a different rendering algorithm to an mp3 container.

    OGG is the container format. The audio encoding is actually called "Vorbis".
    )

    Ahh dem good ol' days when everyone one busy arguing the pros and cons
    of bog standard mp3 and bit rates vs ogg and I think flac at the
    time... I just stuck with mp3, didn't see the point in trying to
    convert to format to keep up, you're not going to improve it, and
    you're at the mercy of yet another level adaption.

    If I want to share something far and wide, I'll use MP#, because it's the most widely supported format. For archiving, I'll use whatever gives the best quality. If the original material is uncompressed, I'll use FLAC. Anything compressed, I'll keep in the format it came in, to minimise the number of conversions.


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  • From Oli@21:1/151 to Vk3jed on Monday, February 03, 2020 09:01:37

    Lossy audio compression is a different story (it's called lossy for a
    reason). Some analog noise and inaccuracies are less annoying than
    digital artifacts from lossy
    compression.

    That is true. Overdo l,ossy compression and it sounds crap. Some people
    are
    also extremely sensitive to lossy compression. I'm "moderately sensitive"
    in
    that I can pick up a lot that most people miss, but I do know people much
    more
    sensitive than me, that I've had to use FLAC with for any critcal
    listening,
    because even 320k MP3 was too lossy for them. For me, 192k is usually acceptable for general listening, though I can sometimes hear artifacts at
    this
    bitrate.

    Sometimes I feel 192 kbps is good enough for casual listening and sometimes I'm convinced I can hear the MP3 artifacts even at 320 kbps. It depends on the music, the
    encoder and the speakers or headphones, maybe even the room. My theory is that cheap
    equipment or a listening position far off-center makes it easier to recognize the
    distortions. The compression is based on a psychoacoustic model. Some frequencies
    masking others. In a non-ideal listening environment this could break down and distortions you shouldn't hear become obvious. It's just a theory based on my own
    observations.

    As storage getting cheaper every year I just don't see any reason for lossy compression
    for mu own music collection. Even for streaming on the Interenet a flac stream uses
    much less bandwith than a 1080p youtube.


    I also seem to not do as well with AAC as MP3 sometimes, so I'm
    probably more sensitive to what AAC removes, despite the fact it's
    supposed to
    be "better". :)

    My brain is trained to recognize MP3 artifacts, but I think it's plausible that
    some
    people are more sensitive to AAC artifacts. Maybe AAC files also often use lower
    bitrates, because people believe it is so good that you can get CD quality at 96 or 128
    kbits.

    We often have different artifacts from repeated encoding. Youtube video: original
    source mp4, encoded by youtube to opus, encoded by your phone to some shitty bluetooth
    codec for your wireless headphones.

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  • From Phoobar@21:2/147 to Vk3jed on Monday, February 03, 2020 04:36:47
    Digital is sampled, but it is an accurate representation of the analog signal for frequencies up to 1/2 of the samiling frequency (the "Nyquist limit"). Actually, that's not the only scenario, but it's the one
    relevant to digital audio. Side note: it's possible to sccurately

    Still the same for PSK31/JT65/FS8?

    Not all hardware based devices support OGG. MP3 is the safest bet for "universal" playback. :)

    True...but did like the quality control I got with it.

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  • From Vk3jed@21:1/109 to Oli on Tuesday, February 04, 2020 13:03:00
    On 02-03-20 09:01, Oli wrote to Vk3jed <=-

    Sometimes I feel 192 kbps is good enough for casual listening and sometimes I'm convinced I can hear the MP3 artifacts even at 320 kbps.
    It depends on the music, the
    encoder and the speakers or headphones, maybe even the room. My theory
    is that cheap
    equipment or a listening position far off-center makes it easier to recognize the
    distortions. The compression is based on a psychoacoustic model. Some frequencies

    Yes, there's a bunch of variables. Sometimes it works fine, other times it sounds crap. :)

    masking others. In a non-ideal listening environment this could break
    down and distortions you shouldn't hear become obvious. It's just a
    theory based on my own
    observations.

    Possibly. In my case, there's the potential for different sensory processing, which could also break down the assumptions behind the models used in compression. :)

    As storage getting cheaper every year I just don't see any reason for lossy compression
    for mu own music collection. Even for streaming on the Interenet a flac stream uses
    much less bandwith than a 1080p youtube.

    Good point, though mobile use still has some limitations - namely storage (typically 16 - 128GB these days) and data caps - Mobile data in some places is a lot more expensive than fixed line. That's normally true here. I would like to see FLAC universally supported in hardware devices.

    My brain is trained to recognize MP3 artifacts, but I think it's
    plausible that
    some
    people are more sensitive to AAC artifacts. Maybe AAC files also often
    use lower
    bitrates, because people believe it is so good that you can get CD
    quality at 96 or 128
    kbits.

    For me, a 128k MP3 often sounds better than 128k AAC. It shouldn't, but often does. Again, I put that down to the assumptions underpinning the various psycho-acoustic models used. I've also had some issue with VBR. Again, my sensory differences may be an issue. :) Like you, I can train myself to pick out artifacts. For me, that's fairly straightforward, because most of the required processing is automatically done as part of my normal auditory processing - separating out content from environment and storage/transmission. I've had that capability since my early ham radio days, some 30 years ago. :)

    We often have different artifacts from repeated encoding. Youtube
    video: original
    source mp4, encoded by youtube to opus, encoded by your phone to some shitty bluetooth
    codec for your wireless headphones.

    That too. I have a batch file that uses ffmpeg to strip the AAC off newer YouTube (these days, the majority) videos without re-encoding. I don't like to muck arouns with the audio any more than absolutely necessary, for obvious reasons. :)


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  • From Vk3jed@21:1/109 to Phoobar on Tuesday, February 04, 2020 13:16:00
    On 02-03-20 04:36, Phoobar wrote to Vk3jed <=-

    Digital is sampled, but it is an accurate representation of the analog signal for frequencies up to 1/2 of the samiling frequency (the "Nyquist limit"). Actually, that's not the only scenario, but it's the one
    relevant to digital audio. Side note: it's possible to sccurately

    Still the same for PSK31/JT65/FS8?

    Relevance? I don't follow your logic, since those are DATA modes, not even for speech, let along music reproduction. *confused look*

    Not all hardware based devices support OGG. MP3 is the safest bet for "universal" playback. :)

    True...but did like the quality control I got with it.

    What sort of quality control?


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  • From Phoobar@21:2/147 to Vk3jed on Monday, February 03, 2020 20:23:53
    Still the same for PSK31/JT65/FS8?
    Relevance? I don't follow your logic, since those are DATA modes, not even for speech, let along music reproduction. *confused look*

    Do the same "rules" for audio also for these digital modes?

    True...but did like the quality control I got with it.
    What sort of quality control?

    In terms of setting the quality of encoding the files.

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  • From Spectre@21:3/101 to Vk3jed on Tuesday, February 04, 2020 16:16:00
    Sometimes I feel 192 kbps is good enough for casual listening and sometimes I'm convinced I can hear the MP3 artifacts even at 320
    kbps.

    Yes, there's a bunch of variables. Sometimes it works fine, other times it sounds crap. :)

    I find the player makes a bigger difference than the encoding, or it used to seem that way. The only thing I use, and has been for years now, is VLC, and sometime before that it was erm.. MusicMatch JukeBox long before it went to pot. But you could have the same data set sound realllllly rough in some players while others could make it sound at least to me, like the band was still playing in the next room :)

    Spec


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  • From Vk3jed@21:1/109 to Phoobar on Wednesday, February 05, 2020 12:37:00
    On 02-03-20 20:23, Phoobar wrote to Vk3jed <=-

    Still the same for PSK31/JT65/FS8?
    Relevance? I don't follow your logic, since those are DATA modes, not even for speech, let along music reproduction. *confused look*

    Do the same "rules" for audio also for these digital modes?

    I can't see the relevance, because data modes are designed for accurate transmission of data (on amateur radio, generally text), where there's no lossy compression of the source.

    True...but did like the quality control I got with it.
    What sort of quality control?

    In terms of setting the quality of encoding the files.

    More information needed - what extra controls did you have that you didn't have with MP3?


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  • From Vk3jed@21:1/109 to Spectre on Wednesday, February 05, 2020 12:46:00
    On 02-04-20 16:16, Spectre wrote to Vk3jed <=-

    I find the player makes a bigger difference than the encoding, or it
    used to seem that way. The only thing I use, and has been for years
    now, is VLC, and sometime before that it was erm.. MusicMatch JukeBox
    long before it went to pot. But you could have the same data set sound realllllly rough in some players while others could make it sound at
    least to me, like the band was still playing in the next room :)

    Yes, the player also has a bearing on things. Possibly a combination of both, because some players handle some encodings better than others.

    VLC is quite good too, though I use my phone more than anything else these days for audio (in the car). :)


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  • From Oli@21:1/151 to Vk3jed on Wednesday, February 05, 2020 08:49:51

    True...but did like the quality control I
    got with it. What sort of quality control?

    In terms of setting the quality of encoding the
    files.

    More information needed - what extra controls
    did you have that you didn't have with MP3?

    In theory the Vorbis encoder could be better
    optimized for the content. The disadvantage is
    that you need the codebook from the beginning of the
    file / stream, which made some use cases harder to
    implement.

    I don't remember that the encoding tools had more
    options than Lame based MP3 encoders, maybe even
    less. I haven't used that stuff for a while. Nowadays
    it's all FLAC (or wavpack) and Opus.

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  • From Vk3jed@21:1/109 to Oli on Wednesday, February 05, 2020 19:55:00
    On 02-05-20 08:49, Oli wrote to Vk3jed <=-

    In theory the Vorbis encoder could be better
    optimized for the content. The disadvantage is
    that you need the codebook from the beginning of the
    file / stream, which made some use cases harder to
    implement.

    Ahh, OK cool. That makes sense. :)

    I don't remember that the encoding tools had more
    options than Lame based MP3 encoders, maybe even
    less. I haven't used that stuff for a while. Nowadays
    it's all FLAC (or wavpack) and Opus.

    I generally use FLAC or MP3 myself, FLAC because it's lossless and well supported, MP3 for use on hardware devices. I did look at Opus and found it interesting though.


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  • From Phoobar@21:2/147 to Vk3jed on Wednesday, February 05, 2020 05:20:10
    More information needed - what extra controls did you have that you
    didn't have with MP3?

    Was an experiment with something I had read about to see if it would allow a better sounding file.

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  • From Spectre@21:3/101 to Vk3jed on Thursday, February 06, 2020 00:10:00
    VLC is quite good too, though I use my phone more than anything else
    these days for audio (in the car). :)

    In the car, I have the FM radio glued to moldy oldies these days...

    Spec


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  • From Vk3jed@21:1/109 to Phoobar on Thursday, February 06, 2020 14:37:00
    On 02-05-20 05:20, Phoobar wrote to Vk3jed <=-

    More information needed - what extra controls did you have that you
    didn't have with MP3?

    Was an experiment with something I had read about to see if it would
    allow a better sounding file.

    And did it help?


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  • From Vk3jed@21:1/109 to Spectre on Thursday, February 06, 2020 14:38:00
    On 02-06-20 00:10, Spectre wrote to Vk3jed <=-

    VLC is quite good too, though I use my phone more than anything else
    these days for audio (in the car). :)

    In the car, I have the FM radio glued to moldy oldies these days...

    I just use my phone on Bluetooth. In the car, that's "good enough". :)


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  • From Phoobar@21:2/147 to Vk3jed on Thursday, February 06, 2020 04:43:17
    Was an experiment with something I had read about to see if it would allow a better sounding file.
    And did it help?

    I thought so...but my mgr told me to quit my experience & go back to MP3.

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  • From Vk3jed@21:1/109 to Phoobar on Friday, February 07, 2020 18:58:00
    On 02-06-20 04:43, Phoobar wrote to Vk3jed <=-

    Was an experiment with something I had read about to see if it would allow a better sounding file.
    And did it help?

    I thought so...but my mgr told me to quit my experience & go back to
    MP3.

    Oh, OK. sounds like something that would have been good to play with in your spare time at home. :)


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  • From Phoobar@21:2/147 to Oli on Tuesday, March 03, 2020 13:46:51
    internet stream. I would never buy a DAB radio for listening to lossy audio encoded at
    64 kbps.

    Can understand that. Is the coverage the same as most of the digital formats being used OTA?

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