'Twas brillig, and Raymond Yau at 22/04/10 02:11 did gyre and gimble:
is it possible to provide some figure to compare the CPU usage of PA when using pacat, paplay and aplay on your machine ?
the problem of Shuang He seem related to upmixing of stereo to surround71
sink: 0 <alsa_output.pci-0000_00_1b.0.analog-surround-71> volume: 0: 100% 1: 100% 0: 0.00 dB 1: 0.00 dB balance 0.00 muted: no current latency: 444.25 ms requested latency: 31.25 ms sample spec: s16le 2ch 48000Hz channel map: front-left,front-right Stereo resample method: speex-float-3 module: 8 client: 7 <ALSA plug-in [mplayer_2010_0414]>
Probably not meaninfully on this machine as it's only got stereo. I'll try and get one of my more elaborate machines ready for an upmixing comparison.
Col