Elektron Musical Instruments

On Tue, 18 Jan 2000, [iso-8859-1] Bj\ufffdrn Fogelberg wrote:

> From: =?iso-8859-1?Q?Bj=F6rn_Fogelberg?= <bjorn@...>
> 
> > Just out of curiosity, do you mean something that "sounded" like a sample,
> > or actually was sampling?  A crude 4 bit D/A could be simulated on the C64
> > by jogging the volume register (lower 4 bits of $D418) at audio rates.
> > This method didn't have anything to do with tables though (well, I suppose
> > that technically the sample was a "volume table").  Was there a method that
> > resembled the SIDstation table function too?
> 
> No no. I was active as a C64 musician myself so I most definetely knew
> the difference between a sample and these strange sounds. :-) The
> usual C64-music had the SID-chip updated each frame, 50 or 60 times a
> second. These other effects updated maby 10 times per frame so each
> table had ta have a lot of data to play through. But the effect you
> got from it was very coool. :-)
> 
Yes, of course.
But the SIDstation can only update at a maximum of 200 times a second.
Modern SID tunes go even higher.
Take a listen to 
http://samhain.c64.org/~sid/HVSC/C64music/VARIOUS/M-R/Natural_Beat/Taki/Impulse.sid 
or
http://samhain.c64.org/~sid/HVSC/C64music/VARIOUS/M-R/Natural_Beat/Taki/Speed_Up.sid

These are tunes which update SID registers 400 or 800 times a second (I
think Impulse was the faster of these two, but I can't remember)...

Nevertheless, even 50Hz is fast enough if you know what to do.

Cheers,
Andreas