'Twas brillig, and Marcus Weigelt at 07/04/10 11:01 did gyre and gimble: > Hi, > > I´m having an external PCM plugin that should do some processing on > the audio. That part works fine. Now I´d like to have some way to > modify the way to give some parameters to the plugin to tell it how > the processing is done (eg. set delay time, pan, attack time, ...). > I´ve searched the web for days and hours, but could not really find > something. On the alsa mailing list there was a similiar question > three years ago, and the answer was, that one could create user-space > control elements in the plugin. How is that done? I could not find > examples or good documentation about it. Did I miss something out? > Can anyone give me a hint, maybe a link to some docs about it or > source of a PCM plugin creating/using user space control elements? > Thanks a lot. Try looking at the PulseAudio plugin. It presents userspace sliders to control the volume. If I've not misunderstood your request this should do what you need. Col -- Colin Guthrie gmane(at)colin.guthr.ie http://colin.guthr.ie/ Day Job: Tribalogic Limited [http://www.tribalogic.net/] Open Source: Mandriva Linux Contributor [http://www.mandriva.com/] PulseAudio Hacker [http://www.pulseaudio.org/] Trac Hacker [http://trac.edgewall.org/] _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel