Xen Project Developer Summit

Developing a good PV audio solution for Xen is not as simple as it seems. On Xen the audio data bandwidth is not a problem, but the synchronization and the Real Time nature of a real audio card is difficult to workaround. Stefano Panella would like to share some lessons learned developing a PV Audio solution compatible with linux and windows guests, showing the differences in the required guest API (alsa driver for linux, WaveCyclic and WaveRT drivers for Windows). Using a PV audio solution it would be possible to have Acoustic Echo Cancellation working, difficult to achieve with a pure audio emulation. Stefano would also like to discuss about what would be needed to upstream a PV Audio solution, which would involve changes in Xen, qemu and linux.