When trying to running VOIP apps with full duplex audio, the quality is really choppy. There may be other causes but I'm wondering if this Z supports full duplex audio.
The audio hardware (WM9712) appears to support full duplex, but I'm wondering if there are problems with the kernel or driver. The SNDCTL_DSP_SETDUPLEX ioctl does not appear to be supported by /dev/dsp. Can anyone confirm whether this should work?