Re: penny-lane.prg

From: Anders Carlsson <>
Date: Thu, 29 Dec 2011 13:53:39 +0100
Message-ID: <2A5880B5475F4353ABFF47DB92A44043@ryds>
Marko Mäkelä wrote:

> TED uses the VIC-I divider principle as well, but the divider is wider 
> than 7 bits (16 bits?).

I think the TED chip has 8 bit resolution on voice #1 and 10 bit resolution 
on voice #2, the one that is shared between square wave and white noise. 
Since I have made TED music once, I should remember it better than I do. I 
found some kind of note table here:

For that matter, the Atari POKEY chip usually is rather out of tune as well, 
for those songs utilizing all four 8-bit voices. The POKEY however can be 
reconfigured as one 16-bit + two 8-bit voices or even two 16-bit voices for 
much improved accuracy at the cost of fewer voices.

I haven't studied how good accuracy e.g. the AY-3-8910 or SN76489 chips 
provide, but surely every single bit of added control improves the sound. 
Not that it really matters in this discussion, other than excusing that the 
VIC-I might not sound that much worse than most of its contemporaries. 
Comparing with the SID chip is like comparing a $15,000 car to a $100,000 

Best regards

Anders Carlsson

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Received on 2011-12-29 13:00:23

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