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Noise Generation?
Posted: Fri Mar 21, 2014 4:59 am
by pharaohamps
I've been reading the Echotapper blog and there are a couple of posts over there about creating noise using the FV-1 to emulate the characteristics of older echo units. Any ideas on how to create white noise using the FV-1? I'll settle for other types of noise, pink would be acceptable.
Thanks!
Posted: Fri Mar 21, 2014 10:17 am
by frank
I believe Piet used LFSR code I wrote, you can find the 48-bit and 24-bit versions here
http://www.spinsemi.com/forum/viewtopic ... 5&start=15
Posted: Fri Mar 21, 2014 6:27 pm
by pharaohamps
Perfect! Thanks!
Posted: Wed Jun 04, 2014 1:38 am
by seancostello
The code listed above works very well!
Earlier this week, I had implemented randomness using the "grab the lowest bits of the ADC" method. This generates noise, but the noise is not random, in that it is correlated to the input signal running through the ADC. In addition, you need to use a lot of sof -2, 0 statements to get the noise to a reasonable level. I switched over to the LFSR code, and my problems were solved.
Sean Costello