Hi Till, maybe you can do it in Faust with something like this (not tested):
bitDelay = _ <: >>(1), (%(2) : mem : <<(31)) :> _; I am new to Faust and wasn't sure how to test the code above because it uses integers. Any recommnedations how to do this? Matej Am Fr., 5. Juni 2020 um 07:41 Uhr schrieb Stéphane Letz <l...@grame.fr>: > Are you really sure this cannot be expressed using the recursive operator ? > > Do you have some already written code to show ? > > Stéphane > > > Le 4 juin 2020 à 16:58, Till Bovermann <lf...@lfsaw.de> a écrit : > > > > Dear list, > > > > I am currently trying to implement 1bit-synthesis mechanisms in faust > and have some sketches on how to implement that: > > > > It basically boils down to interpret a stream of integers (of a given > bit-depth, say, 32bits) as a stream of blocks (of size 32) of bits. > > > > This is quite close to hardware interfaces such as the i2s > implementation of the esp32 [1], which has native capabilities to transmit > PDM (pulse density modulation, aka DSD, aka 1-bit audio) [2]. > > > > > > the technical implementation would be to create a series of > 1-bit-block-specific operations (primitives) that could handle the basics > of such dsp. This would particularly mean to create a 1-sample delay > operator, i.e. an operator that turns the bitstream > > > > > > 10110101... > > > > into > > > > 010110101... > > > > > > I discovered the `ffunction` primitive that allows to integrate foreign > functions into the language, however, AFAICS (and according to sletz on > slack, and from what I got from the documentation at [3]), they need to be > stateless. > > > > the aforementioned 1-bit delay, though, requires a state (of one > additional integer). > > > > > > does anyone know if there is a possibility to implement such a > (1-sample) delay as a primitive in faust? > > > > > > all the best and thanks for your thoughts > > > > Till > > > > [1] > https://www.espressif.com/sites/default/files/documentation/esp32_technical_reference_manual_en.pdf > > [2] search e.g. for "pdm" in this article > https://hackaday.com/2019/04/18/all-you-need-to-know-about-i2s/ > > [3] https://faust.grame.fr/doc/manual/index.html#ffunction > > > > _______________________________________________ > > Faudiostream-users mailing list > > Faudiostream-users@lists.sourceforge.net > > https://lists.sourceforge.net/lists/listinfo/faudiostream-users > > > > _______________________________________________ > Faudiostream-users mailing list > Faudiostream-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/faudiostream-users >
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