[PD] band limited (anti-alias) techniques

Alexandre Torres Porres porres at gmail.com
Tue Nov 24 16:25:51 CET 2015

cool, I just miss a few bandlimited oscillators in Pd, I'm doing them as
patches/abstractions, but I think the best way to go would be to code an
external, hopefully it ain't be too tricky and hard, but over my head one
way or another :P

2015-11-24 13:22 GMT-02:00 cyrille henry <ch at chnry.net>:

> yes, this can be very efficient when the table is pre computed.
> using 32 bits int and a 8K sample table, I recently implement a BL saw~ in
> an arduino due with surprisingly fast and good result.
> cheers
> c
> Le 24/11/2015 16:12, Frank Barknecht a écrit :
>> Hi,
>> On Tue, Nov 24, 2015 at 01:01:00PM -0200, Alexandre Torres Porres wrote:
>>> Do any of you know the advantages and disadvantages between
>>> "*oversampling
>>> + filtering*" and the other techniques?
>> A big difference is CPU load: the bandlimited oscillators in the
>> rj-library
>> aimed at mobile devices of some years ago use the transition splicing
>> technique
>> because it's one of the fastest. It only needs a simple table lookup in
>> addition to the phasor~ etc.  that are running anyway. We even replaced
>> the
>> tabread4~ with tabread~ to save even more CPU.
>> Ciao
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