[sdiy] Digital noise sources

[John Mahoney]

At 11:26 AM 6/14/2008, Tom Wiltshire wrote:

>One related idea I've seen recently is a feature on the noise source
>on the Nord Lead synth.
>This makes deliberate use of the fact that LFSRs aren't random at
>all, by allowing you to reset the noise source back to some start
>value. By feeding an oscillator to this reset input, you have a
>'synced' noise source. By changing the start value (and hence the
>part of the sequence produced) you can change the tone of the result.
>It's an interesting idea, and for the 20 minutes it'd take to program
>up, I might give it a whirl.

I was thinking about this idea myself, yesterday. I suppose my 
inspiration was the... um... Minksy's digital pattern-playing thing 
from the 1970s... oh, yeah, the Triadex Muse. (Thanks, Google!)

On the Muse, you simply input the starting position and then it plays 
unattended.

I assume there would also be a "restart" input, so the LFSR sequence 
could be made to repeat (play again using the same starting value).

User interface: Binary toggle switches and/or a digitized CV input 
(by which you could even use an analog noise source to preload the 
shift registers).

John 


-- 
No virus found in this outgoing message.
Checked by AVG. 
Version: 7.5.524 / Virus Database: 270.3.0/1502 - Release Date: 6/13/2008 7:25 PM