[sdiy] mm5837 are all over the place!

[ASSI]

On Saturday 11 October 2003 01:28, Scott Gravenhorst wrote:
> I have done so, I use a 32 bit LFSR clocked by a VCO.  I was sort of
> disappointed, to me it sounded much like using a fixed noise
> generator passed through a VCF (LP), CV=pitch.
[...]

For a good practical summary of LFSR, go to http://www.xilinx.com and 
search for application note XAPP052, just skip the device specific 
idiosyncrasies.

A word of caution has to be said for the spectral properties: if you 
take more than one bit out of the LFSR sequence at each clock, then not 
only you'll get non-random sequences, also the spectrum is not white 
any more. Unfortunately it is not predictable what kind of spectrum 
you'll get by tapping off which bits, but you may try anyway and see if 
you get interesting results. The same effect can be had if you chose 
certain feedback points that produces non-maximum sequences.


Achim.

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