[chuck-users] continuous random values

Tom Lieber tom at alltom.com
Tue Sep 28 14:03:45 EDT 2010

2010/9/28 Kassen <signal.automatique at gmail.com>:
>> And SubNoise is sample rate
>> independent if you take the sample rate into account when you set its
>> rate. :D
> That does assume a infinite sample-rate. The result of a shred and a
> Envelope/step will also be quantised to the sample-clock, but the rounding
> error won't carry, like it will with setting SubNoise.

Got it. I just learned something about SubNoise!

>> This is the 1 Hz weirdness I noticed, by the way. The lines are noise
>> generated at 5 Hz, 1.1 Hz, and 1 Hz. You can see the unnaturally long
>> plateaus that get way out of hand at 1 Hz.
>>  http://skitch.com/alltom/d25q8/subnoise
>> But the 5 Hz shape looks pretty nice.
> That's strange! Those should indicate the LPF somehow ends up below the
> frequency of the subnoise and starts averaging too much. In any case it's
> not a bias in the randomness as the plateaus tend to run off towards 0.
> What I can say is that at higher frequencies the frequency resolution in
> steps per octave of SubNoise will go down and so you will get higher
> rounding errors in SubNoise. If that frequency ends up above the frequency
> of the LPF we might see something like what you are seeing?


Tom Lieber

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