At Fri, 05 Aug 2005 18:23:20 +0800, Raymond wrote: > > Takashi Iwai wrote: > > At Mon, 01 Aug 2005 00:37:26 +0800, > > Raymond wrote: > > > >>Jaroslav Kysela wrote: > >> > >>>On Thu, 28 Jul 2005, Raymond wrote: > >>> > >>> > >>> > >>>>In theory, and sound cards with hardware mixing can support this kind of > >>>>volume control. > >>>> > >>> > >>>Nope. Please, define the controls at the driver initialization phase and > >>>make them inactive when the stream is not open. See emu10k1 or trident > >>>driver for hints. You must also map the voice volume with substream > >>>number. > >>> > >> > >>Beside volume control, Is it feasible to bind other controls (e.g. > >>Interaural Time Difference, Interaural Level Difference and SAMPLE RATE > >>CONVERTOR - Doppler Effect ) to the substream ? > > > > > > I think yes. Whatever directly bound to a PCM substream should be > > handled as IFACE_PCM with a certain subdevice number. > > > > > > It's OK for au88x0 to use a sample rate different from that of PCM > stream play the PCM stream to produce a different pitch. > > Does the alsa-lib really allow using a kcontrol to change the sample > rate while playing the PCM to produce the Doppler Effect ?
Currently not officially supported. The rate is assumed to be constant. But changing rate dynamically seems working, though. Takashi _______________________________________________ Openvortex-dev mailing list [email protected] http://lists.nongnu.org/mailman/listinfo/openvortex-dev
