[Openvortex-dev] Re: Volume per voices [Feature Request]

[Raymond]

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 ?


How can the alsa application access those controls
(SNDRV_CTL_ELEM_IFACE_PCM) using the handle return by snd_pcm_open() ?