Re: looking for some info on Magic Voice

From: Groepaz <>
Date: Sun, 23 May 2010 16:04:58 +0200
Message-Id: <>
On Sonntag 23 Mai 2010, you wrote:
> There is no real magic going on, the data is sent uncompressed to the 8706
>  (the decompression is done in software by the ROM) but with a variable bit
>  length. Stefan should have the bitlengths posted somewhere on his site.
>  All in all, that was the biggest challenge to figure out, I remember
>  asking myself the very same things back in the day like you do now :)

mmmh so you are saying that its indeed simply about taking the bytes written 
to the 8706 data register, eventually swapping nibble- and bit-order, and then 
reading variable number of bits from the resulting bit stream? uhmz. i spent 
some hours the other day doing exactly that on paper, and couldnt really see 
how that should work. i can see the first "0x0a" of the data, and then the 
next value is wrong already, no matter how i swap and shuffle bits around. 
*shrug* :)

> >From there, the actual synthesis is relatively easy, since the S&S patent
> > has all the right formulae to be used for the filter.

yeah, we have the actual parcor synthesis running (more or less, needs 
> I can forward a brief summary I mailed to one of the MESS developers a few
>  months ago, once I am back from holiday.

that would be great


Foolish man give wife grand piano. Wise man give wife upright organ.

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Received on 2010-05-23 15:00:12

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