[PD] band limited (anti-alias) techniques

[Alexandre Torres Porres]

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
>>
>>
> _______________________________________________
> Pd-list at lists.iem.at mailing list
> UNSUBSCRIBE and account-management ->
> http://lists.puredata.info/listinfo/pd-list
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.puredata.info/pipermail/pd-list/attachments/20151124/2c4cd185/attachment-0001.html>