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Bamu®
Account closed
Registered: May 2005
Posts: 1332 |
New waveforms...
Last year I have heard something about 'new' SID waveforms (found by SounDemoN)
So, when we finally can use these waveforms with a standard editor?
Does anybody have an idea?
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TDJ
Registered: Dec 2001
Posts: 1879 |
Quote:
Last year I have heard something about 'new' SID waveforms (found by SounDemoN)
So, when we finally can use these waveforms with a standard editor?
Does anybody have an idea?
Was that exactly a year ago? |
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Motion
Account closed
Registered: Aug 2002
Posts: 69 |
You mean, like on the the 1st of April? ;)
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cadaver
Registered: Feb 2002
Posts: 1154 |
Was it something related to the noise waveform & SounDemoN's emulator detection? Anyway, if it requires manipulation of SID registers between normal 50Hz music updates, then no, I don't think it will be in standard music editors.
http://www.btinternet.com/~hoxs64/history.txt |
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iopop
Registered: Dec 2001
Posts: 317 |
I can be completely wrong. But I think this new waveform was used in PICO!. |
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Steppe
Registered: Jan 2002
Posts: 1510 |
Yes, and one of the tune from My Kondom/HJB also makes use of this. There was kind of an editor to create those sounds and play around with the parameters in Vandalism News #45. On side 1 you'll find a program called WAVE COMPOSER. It's not a music editor though.
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dalezy
Registered: Apr 2002
Posts: 475 |
what exactly is it? can't tell i hear anything 'new' in either my kondom, pico or his tune from bp (which got mentioned beforehand). |
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Oswald
Registered: Apr 2002
Posts: 5025 |
AFAIK sid emulators are not yet capable to recreate this effect. IIRC this is about looping the noise waveform, with some trick. Probably you can set the loop start and length aswell in certain limits. |
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Frantic
Registered: Mar 2003
Posts: 1629 |
When combining the noise waveform with another waveform, i.e. setting waveform $9 or so, it has the result of resetting the internal sid counter that generates the noise waveform. SounDemon noticed this (I think this was stated in the reSID documentation, but I may be wrong, perhaps it just states that this will stop the noise generator, or something like that) and got the idea of resetting the noise waveform periodically to achieve other waveforms. For some frequencies it is enough to reset the counter like three times a frame, so even if it may not become part of the standard sid editor battery, it is not completely unusuable for everything, at least. :) This noise waveform resetting is what you hear in Pico (which to my ears indeed have some weird sounds in them, but only on a real c64 of course).
The process of resetting the internal counter has some analogue components though, because it is not just going to 0 at once or so (don't even think it is "reset" to 0 specifically). Rather, bits drop off during a short time and it seems like SID do not act completely as a digital state machine in this case.
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Bamu®
Account closed
Registered: May 2005
Posts: 1332 |
Interesting! |
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Monte Carlos
Registered: Jun 2004
Posts: 351 |
I remember, that the sid's voice turns off, if you
combine the noise waveform with any other.
Then you can only reset it by setting the test bit of
the particular voice.
What happens if you do this periodically?
I did't got it from the explanation above.
Can you explain it again for stupid guys like me? ;)
Monte
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