Re: penny-lane.prg

From: Marko Mäkelä <>
Date: Thu, 29 Dec 2011 14:39:12 +0200
Message-ID: <20111229123912.GE2857@x60s>
On Thu, Dec 29, 2011 at 01:03:02PM +0100, Anders Carlsson wrote:
>Usually a change in the frequency table or even transposing to a 
>different key does wonders when it comes to VIC-20 music.

Yes, the f=base_frequency/x is so inaccurate with x being from 1 to 128 
or something like that. With higher frequencies (small values of x), the 
error gets bigger, because 1/x and 1/(x+1) would be further apart than 
with low frequencies (big values of x).

On the SID, choosing frequencies is much easier, because you would 
specify a 16-bit multiplier of a base frequency, not a divider. IIRC, 
the TED uses the VIC-I divider principle as well, but the divider is 
wider than 7 bits (16 bits?).

>Then we have the PAL vs NTSC issues too.. some songs might sound great 
>in one key with PAL frequencies but awful with corresponding NTSC 
>frequencies (and even worse if replayed with PAL frequencies on a NTSC 

Exactly, it is very hard to produce good-sounding music on the VIC-I.


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Received on 2011-12-29 13:00:17

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