5 Oct
2010
5 Oct
'10
6:35 p.m.
Hi friends,
Just wanted to share this amazing video of a c64 doing realtime
effects that has been passing through the interweb today.
The effects are quite spectacular for a machine that old and limited
but I think perhaps the most amazing thing is that they managed to
compress 2 minutes worth of Tom's Diner into 26kb of data, if I read
the the white paper correctly.
A video demonstration here:
http://www.youtube.com/watch?v=MDrqBYkco-Y
A white paper here:
http://www.livet.se/mahoney/c64-files/Cubase64_White_Paper_by_Pex_Mahoney_T…
Have only skimmed it yet but looks very interesting.
Ofcourse there is always the chance this is a hoax but I sure hope not :)
Regards,
Robert
5 Oct
5 Oct
7:01 p.m.
Robert Jonsson wrote:
Hi friends,
Just wanted to share this amazing video of a c64 doing realtime
effects that has been passing through the interweb today.
The effects are quite spectacular for a machine that old and limited
but I think perhaps the most amazing thing is that they managed to
compress 2 minutes worth of Tom's Diner into 26kb of data, if I read
the the white paper correctly.
A video demonstration here:
http://www.youtube.com/watch?v=MDrqBYkco-Y
A white paper here:
http://www.livet.se/mahoney/c64-files/Cubase64_White_Paper_by_Pex_Mahoney_T…
Have only skimmed it yet but looks very interesting.
Ofcourse there is always the chance this is a hoax but I sure hope not :)
Don't know about that one, but the first digitized audio recording I
ever heard had been digitized on a C64. "Why Can't This Be Love?" by Van
Halen.
Modern folk might not be aware of it, but the C64 had an 8-bit parallel
port that connected directly to the CPU. With Forth or Assembly code,
you could read that port in real time and store it in memory. I don't
remember what the max sample rate was ...
--
David
gnome(a)hawaii.rr.com
authenticity, honesty, community
8:22 p.m.
On Tuesday 05 October 2010 15:01, david wrote:
Don't know about that one, but the first digitized
audio recording I
ever heard had been digitized on a C64. "Why Can't This Be Love?" by Van
Halen.
Mine was Flesh for Fantasy by Billy Idol, also on the c64. Don't know
which demo came first (and I'd be surprised if anyone knew the release
dates for any of these early demo-scene releases), but the Billy Idol song
is an older song.
Rob
6 Oct
6 Oct
6:54 a.m.
Rob wrote:
On Tuesday 05 October 2010 15:01, david wrote:
I have no idea which one came first. I was just amazed that a cheap
little home computer could do that while the vaunted PCs couldn't.
The C64's SID (Sound Interface Device) chip was a 4-voice synthesizer
with full control over ADSR. Quite a potent little thing!
--
David
gnome(a)hawaii.rr.com
authenticity, honesty, community
Don't know about that one, but the first
digitized audio recording I
ever heard had been digitized on a C64. "Why Can't This Be Love?" by Van
Halen.
Mine was Flesh for Fantasy by Billy Idol, also on the c64. Don't know
which demo came first (and I'd be surprised if anyone knew the release
dates for any of these early demo-scene releases), but the Billy Idol song
is an older song. 
11:41 a.m.
On Wed, Oct 6, 2010 at 8:46 AM, Arve Barsnes <arve.barsnes(a)gmail.com> wrote:
On Wed, Oct 6, 2010 at 8:54 AM, david
<gnome(a)hawaii.rr.com> wrote:
Yep... 3 Channels only. What a fantastic machine it was! Oh happy days! :)
OT but, the easy way to do C64 music on Linux now is with goattracker:
http://sourceforge.net/projects/goattracker2/
But I prefer to use the even easier approach of using the SID lunar
plugin in Neiltracker these days..
James
Rob wrote:
The C64's SID (Sound Interface Device)
chip was a 4-voice synthesizer with
full control over ADSR. Quite a potent little thing!
I thought it was only 3 channels? 
11:57 a.m.
Actually, I could've sworn that the SID had 3 voices with independent
oscillators and a 4th sort of 'audio' channel due to some sort of
memory glitch or such? I'm not sure of the specifics.
Andrew.
On Wed, Oct 6, 2010 at 12:41 PM, James Stone <jamesmstone(a)gmail.com> wrote:
On Wed, Oct 6, 2010 at 8:46 AM, Arve Barsnes
<arve.barsnes(a)gmail.com> wrote:
On Wed, Oct 6, 2010 at 8:54 AM, david
<gnome(a)hawaii.rr.com> wrote:
Yep... 3 Channels only. What a fantastic machine it was! Oh happy days! :)
OT but, the easy way to do C64 music on Linux now is with goattracker:
http://sourceforge.net/projects/goattracker2/
But I prefer to use the even easier approach of using the SID lunar
plugin in Neiltracker these days..
James
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Linux-audio-user(a)lists.linuxaudio.org
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Rob wrote:
The C64's SID (Sound Interface Device)
chip was a 4-voice synthesizer with
full control over ADSR. Quite a potent little thing!
I thought it was only 3 channels? 
12:50 p.m.
On 10/06/10 13:57, Andrew C wrote:
Actually, I could've sworn that the SID had 3
voices with independent
oscillators and a 4th sort of 'audio' channel due to some sort of
memory glitch or such? I'm not sure of the specifics.
Andrew.
The trick was/is to output noise through one of the voices and use the
master-output gain to 'fake' PCM. I guess that's how "Cubase64"
works.
You may also like the Chipophone:
http://www.youtube.com/watch?v=m1pchpDD5EU
an amazing 8-bit synth for live playing of your favorite tunes.
ciao,
robin
On Wed, Oct 6, 2010 at 12:41 PM, James Stone
<jamesmstone(a)gmail.com> wrote:
> On Wed, Oct 6, 2010 at 8:46 AM, Arve Barsnes <arve.barsnes(a)gmail.com> wrote:
>> On Wed, Oct 6, 2010 at 8:54 AM, david <gnome(a)hawaii.rr.com> wrote:
>>> Rob wrote:
>>>>
>>> The C64's SID (Sound Interface Device) chip was a 4-voice synthesizer
with
>>> full control over ADSR. Quite a potent little thing!
>>>
>> I thought it was only 3 channels?
>
> Yep... 3 Channels only. What a fantastic machine it was! Oh happy days! :)
>
> OT but, the easy way to do C64 music on Linux now is with goattracker:
>
> http://sourceforge.net/projects/goattracker2/
>
> But I prefer to use the even easier approach of using the SID lunar
> plugin in Neiltracker these days..
>
> James
> _______________________________________________
> Linux-audio-user mailing list
> Linux-audio-user(a)lists.linuxaudio.org
> http://lists.linuxaudio.org/listinfo/linux-audio-user
>
12:59 p.m.
2010/10/6 Robin Gareus <robin(a)gareus.org>rg>:
On 10/06/10 13:57, Andrew C wrote:
Actually, I could've sworn that the SID had 3
voices with independent
oscillators and a 4th sort of 'audio' channel due to some sort of
memory glitch or such? I'm not sure of the specifics.
Andrew.
The trick was/is to output noise through one of the voices and use the
master-output gain to 'fake' PCM. I guess that's how "Cubase64"
works. From the white paper:
"The Commodore 64 has
a sound chip that wasn't designed for
playing samples. Since there's not much available memory,
they did not intend the SID chip to play samples - 64kB with
8kHz sample rate will give you a some 8 seconds of sound to
play. There was no need for sample playback.
So, we have to fool the SID chip to play samples, even
though it only has the means of playing either a continuous
triangle waveform, sawtooth waveform, pulse-width waveform
or noise waveform. This is done by using the triangle
waveform, resetting the oscillator with an undocumented testbit
originally implemented for factory testing, setting the
accumulator frequency to change the increment speed of the
accumulator, and then after an exact number of clock cycles
enable the triangle waveform output just briefly, practically
emulating a sample-and-hold filter that will keep the analog
output fixed at a certain voltage."
/Robert
10:04 p.m.
On 6 October 2010 13:59, Robert Jonsson <spamatica(a)gmail.com> wrote:
2010/10/6 Robin Gareus <robin(a)gareus.org>rg>:
Reminds me of the Amstrad CPC version of Codemasters "Super Robin
Hood" (an 8bit platform game whose aim was to rescue Maid Marrion from
Nottingham Castle) in which the sampled voice of Maid Marion could be
heard to say "Shave me Robin Hood!" Incidently, I used to love the
music to Codemaster's "Grand Prix Simulator".
--
_
: http://jwm-art.net/
-audio/image/text/code
On 10/06/10 13:57, Andrew C wrote:
From the white paper:
"The Commodore 64 has a sound chip that wasn't designed for
playing samples. Since there's not much available memory,
they did not intend the SID chip to play samples - 64kB with
8kHz sample rate will give you a some 8 seconds of sound to
play. There was no need for sample playback.
So, we have to fool the SID chip to play samples, even
though it only has the means of playing either a continuous
triangle waveform, sawtooth waveform, pulse-width waveform
or noise waveform. This is done by using the triangle
waveform, resetting the oscillator with an undocumented testbit
originally implemented for factory testing, setting the
accumulator frequency to change the increment speed of the
accumulator, and then after an exact number of clock cycles
enable the triangle waveform output just briefly, practically
emulating a sample-and-hold filter that will keep the analog
output fixed at a certain voltage."
Actually, I could've sworn that the SID had 3
voices with independent
oscillators and a 4th sort of 'audio' channel due to some sort of
memory glitch or such? I'm not sure of the specifics.
Andrew.
The trick was/is to output noise through one of the voices and use the
master-output gain to 'fake' PCM. I guess that's how "Cubase64"
works.
7 Oct
7 Oct
4:04 a.m.
Arve Barsnes wrote:
On Wed, Oct 6, 2010 at 8:54 AM, david
<gnome(a)hawaii.rr.com> wrote:
Probably I'm just remembering wrong. But we're talking about voices
here, not channels. SID only had one channel out.
I think someone else on the list mentioned that it had 4. I seem to
recall now that you could use the 4th voice as a VCO on any of the other
three, or something like that.
--
David
gnome(a)hawaii.rr.com
authenticity, honesty, community
Rob wrote:
The C64's SID (Sound Interface Device) chip was a 4-voice synthesizer with
full control over ADSR. Quite a potent little thing!
I thought it was only 3 channels?
5171
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10 comments
8 participants
participants (8)
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Andrew C -
Arve Barsnes -
david -
James Morris -
James Stone -
Rob -
Robert Jonsson -
Robin Gareus