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Mixer
Registered: Apr 2008
Posts: 422 |
Software Synths
There are some music tools and programs made for stock c-64 which produce sound or music, but are not necessarily using sid chip the usual way.
Such as:
SAM,
radwar speech,
the ESS speech,
Galways drums,
AndyM00's pulsetrain stuff,
Soundemons new waveform-stuff,
THCM Mod players,
Some of the Vicious Sid I and II routines,
Mahoneys many achievements,
Algorithms VQ packed players,
Censors various pwm players,
Eebens Pollytracker,
Retroskoi
We can observe that several c-64 musicians and coders have experimented with software based synthesis or sampling/compression over the years.
Most of the listed are rather recent. There must be plenty more weird sound routines done during the last 30 years that are not yet listed.
If you know of some past oddness that should be on the list - published or unpublished, please, paste a link or desrcibe. Would be interesting topic for discussion and perhaps someone gets a new idea. |
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chatGPZ
Registered: Dec 2001
Posts: 11108 |
i would leave out those that are basically sample players (because there are tons of them, and they are not very interesting when it comes to their "synth" part)
i would think that some of those cool guys in the past already used things like that "auto chords" stuff though - would be really interesting to analyze indeed :) |
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algorithm
Registered: May 2002
Posts: 702 |
Some info here.. Nothing fancy about the decoder. The encoders do all the grunt work..
VQ METHODS
x or more bytes (samples) allocated to a byte LUT.
8bit LUT VQ (Used in 8Bit Passion) - With resequencing of patterns
8bit Dual LUT VQ (Speech Channel and background channel mixed)
10bit LUT VQ (1024 waveforms) - Used in VQ mania
SPADPCM2
2Bit Step Predicted ADPCM.
Each chunk consists of two optimum step values with subsequent 2bit
stream adding or subtracting one of two step sizes. Used in "Just dance 64"
SPADPCM1
1BIT Quad predicted ADPCM
Each chunk consists of an optimum step value with subsequent 1bit stream adding or subtracting via the step size. Used in "Channels SPADPCM1" - with resequencing
OFFSET / LENGTH SPEECH
256 byte speech table with 2 bytes pointing to offset of codebook, length is repeated until block is full (eg 128 bytes or 256)
Used in the speech part of Demolicious
More to come... :-) |
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Mixer
Registered: Apr 2008
Posts: 422 |
Geir Tjeltas Echoes - should naturally be on the list for the delay effect. |
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chatGPZ
Registered: Dec 2001
Posts: 11108 |
space taxi maybe - it plays samples using the filters in a strange way i havent seen anywhere else. |
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Rough
Account closed
Registered: Feb 2002
Posts: 1829 |
I guess this counts for other Silas Warner/Muse games too!? |
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Mixer
Registered: Apr 2008
Posts: 422 |
Quote: space taxi maybe - it plays samples using the filters in a strange way i havent seen anywhere else.
Space Taxi Seems to be toggling filter on/off for audio channel 1 while it has full square wave and PWM selected. Is it a PWM sample with filter on/off or some other mechanism? Anyway, since it is on oscillator+filter, it should work also with 8580?
Space Taxi is by Silas Warner, would be interesting to take a look at the other games. |
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chatGPZ
Registered: Dec 2001
Posts: 11108 |
no idea :) A.C.E. is another one that plays samples in unconventional ways (didnt investigate further yet, my guess is that it uses the noise waveform somehow) |
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algorithm
Registered: May 2002
Posts: 702 |
Ice guys Ice Guys
Uses 2bit via waveforms |
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chatGPZ
Registered: Dec 2001
Posts: 11108 |
Quote:Anyway, since it is on oscillator+filter, it should work also with 8580?
that made me wonder as well - as it clearly doesnt work on 8580 at all :) |
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McMeatLoaf
Registered: Jan 2005
Posts: 105 |
Quote: no idea :) A.C.E. is another one that plays samples in unconventional ways (didnt investigate further yet, my guess is that it uses the noise waveform somehow)
Perhaps something like turning the testbit on/off? |
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