Date   : Tue, 01 May 2007 21:19:24 +0100
From   : wooky@... (Wookie)
Subject: Tone Dialling Frequencies

Alex Taylor wrote:
> On 30 Apr 2007, at 23:30, Andrew Chesterton wrote:
>> I'm not sure if the BBC sound chip can output 2 different frequencies
>> simultaniously.
> 
> Surely it can, by using two sound channels. The Electron couldn't do  
> this though....
> 
> This is what made me think that there might be some element of  
> distortion in the Beeb's output, if it doesn't work.
> 

I did this on a Archimedes years ago with a BASIC program I'm sure I 
used sound / envelope commands, give me a bit of time to trawl though my 
old discs and I'll mail up the appropriate code.

Cheers
Wookie.