Xover wrote: > Background: I would like to implement real time DSP on audio files and > streamed audio e.g. Spotify, played to a DAC with an asynchronous USB > interface, using my own DSP code.
This should be done with an external filter plugin: <http://www.alsa-project.org/alsa-doc/alsa-lib/group___p_c_m___ext_plug.html> Pretty much undocumented; for an example, see the speex plugin: <http://git.alsa-project.org/?p=alsa-plugins.git;a=tree;f=speex;hb=HEAD> > Ideally I would like an ALSA loopback driver that merely requests audio > data from the audio player app in the same quantities as I request data > from the loopback driver (with some buffering and a bit of latency > obviously). Does such a driver exist? > > The nearest I am aware of is the snd-aloop driver, which runs at its own > rate It is intended to be used when there is no actual hardware device. Regards, Clemens ------------------------------------------------------------------------------ _______________________________________________ Alsa-user mailing list Alsa-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/alsa-user
