PSG as PCM + PSG wave stop

1999-07-11 Thread Alex Mitsio Sato

MkII wrote:
  Fclock
 Freq=--
  16*(r0+r1*256)
 Yes, but I'm looking for a precalculated table, just to save the hassle of
 searching for an "equal-tempered" scale in Hz and coding a piece of BASIC
 or CM to generate the table 8:\
Well, make a program to create the table you want.
Or, tell me how is the format of this table which you want and I'll do
it for you.

 OK, thanks. I did it on the ZX Spectrum an the ST, but they have the Yamaha
 flavour of the PSG.
Do you believe that I made a Stereo 4bit PCM player for MSX1
However it was not a true stereo, it was only 2 channels PCM, not really
"stereo" because I used channel A and B of PSG. ;-)
But the quality of the sound. :-( 
(Sampling rate about 5~6Khz)

MkII wrote:
 What's the actual effect of setting both pitch registers of a channel to 0?
 A "frozen" wave or a "supersonic" pitch wave?
The ocilator stops.

Regards

Alex Mitsio Sato



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Re: PSG as PCM + PSG wave stop

1999-07-11 Thread MkII

 Yes, but I'm looking for a precalculated table, just to save the hassle of
 searching for an "equal-tempered" scale in Hz and coding a piece of BASIC
 or CM to generate the table 8:\
Well, make a program to create the table you want.

Yeah, I'll do. Just wondering if someone had already that table at hand to
save me some programming overload.

Or, tell me how is the format of this table which you want and I'll do
it for you.

Something like a couple of bytes specifying the value of the fine and
coarse pitch registers for each note on the scale. Is just a simple
program, but don't have the "tempered-or-whatever" scale Hz values at hand
8:\

Do you believe that I made a Stereo 4bit PCM player for MSX1
However it was not a true stereo, it was only 2 channels PCM, not really
"stereo" because I used channel A and B of PSG. ;-)

But it would sound STEREO on an Amstrad (!). AFAIK the CPC series had
channels A  B of the PSG mapped to stereo channels L  R, and the C
channel to both. But that was just at headphone level. It had just one
speaker inside 8;)

But the quality of the sound. :-(
(Sampling rate about 5~6Khz)

8:-(

 What's the actual effect of setting both pitch registers of a channel to 0?
 A "frozen" wave or a "supersonic" pitch wave?
The ocilator stops.

If the oscillator really stops then I'm just happy 8:

NO MORE POPPING!!!

Kiss-pop-pop!

Mk2




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