[sdiy] Casio VL-TONE

[Paul Anderson]

I believe it is a custom casio chip. Though, oddly enough, there's a voice that has programmable parameters. By punching a six digit number you set the different parameters. 

Sent from my iPhone

> On Sep 4, 2014, at 6:41 PM, Adam Inglis <21pointy at tpg.com.au> wrote:
> 
> And that was presumably the cheapest (and most compact?) way that Casio could make a snare sound in 1980. Was it done with a proprietary Casio chip?
> 
> 
> BTW I'm waiting with breath abated to see what "designer" digital drum delight Richie is cooking up in his lab using these ingredients...
> 
> Adam
> 
>> On 05/09/2014, at 6:09 AM, Richie Burnett wrote:
>> 
>> Thanks to all those who emailed offering help with this.  I've now got some pristine quality 192kHz 16-bit samples of the drum sounds in question. These revealed precisely the information I was looking for.
>> 
>> For anyone interested, I can now clearly see that the snare sound is made up of a Pseudo Random Bit Sequence from a 15-bit Linear Feedback Shift Register clocked at about 82150 Hz and using the polynomial x^15 + x^14 + 1   An amplitude envelope that decays in 15 discrete steps is then applied to this noise.
>> 
>> It's amazing what you can see from a decent hi-res audio recording!
>> 
>> Many thanks,
>> 
>> -Richie,
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