Re: Playing samples on both new and old SIDs

From: Carlsson, Anders (
Date: 2000-07-27 15:18:18

Marko Mäkelä <> wrote:

>> The lack of pitch resolution on the oscillators is a serious 
>> drawback IMHO.
> Exactly.  Only a few low octaves are somewhat usable.  
> High frequencies suffer most.

Tell me about it! To me it seems you have two choices when you're
designing the note table to use in your music player; either one
with decent tuning in the first 1.5 - 2 octaves, or one which 
sounds terrible all over, but without detune between full octaves.

Speaking of the VIC oscillators, they seem very unreliable, and
the square waves seems to be produced independent on the channels;
i.e. two notes on different channels might clear out eachother
partly (different waveform on output) or completely (no output).
I have noticed this very recently while writing music for an 
upcoming VIC-20 megademo. First I thought there was a way to
time (control) this and use it to create more waveforms, but I

Possibly there is a difference in resolution between NTSC and PAL
VICs (I never heard a real NTSC VIC), and I still don't know if
there is any difference between VICs labeled 6561-101 and 6561E.
The latter is what I got in my machine.

/Anders Carlsson
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