>> When I play 16/44.1 flac files via mpd, the CPU stays around 95%. >> When I play the same files via mplayer, the CPU stays around 2% and I >> see: >> >> AO: [alsa] 96000Hz 2ch s16le (2 bytes per channel) >> >> This is confusing for 2 reasons: >> >> 1. Doesn't the above indicate that the source file is not being >> converted from 16-bit to 24-bit even though I've specified "format >> S24_3LE"? > > Are you sure the hardware actually supports S24_3LE? Most 24 bit > soundcards require 24 bit audio to be packed into 32 bit words. See > if you can output S24_3LE directly to the hw device. I don't think a USB DAC could do 24-in-32 because of the USB 24-bit limitation. I've tried specifying S24_3LE, S24LE, S24_BE, S24_3BE, FLOAT_LE, FLOAT_BE, and S16_LE in asound.conf. None of them produce sound except for S24_3LE and S16_LE. How can I output S24_3LE directly to the device for testing? - Grant >> 2. Why is so much more CPU being used to play files with mpd than with >> mplayer? If I remove the asound.conf entries, mpd no longer uses more >> than 2% CPU. >> > > You'd have to profile mpd to see where it's spending all its time. > Maybe it writes to the soundcard in much smaller chunks, or spins if > the card if it has data but the device is not ready yet. > > Lee ------------------------------------------------------------------------------ Crystal Reports - New Free Runtime and 30 Day Trial Check out the new simplified licensing option that enables unlimited royalty-free distribution of the report engine for externally facing server and web deployment. http://p.sf.net/sfu/businessobjects _______________________________________________ Alsa-user mailing list Alsa-user@xxxxxxxxxxxxxxxxxxxxx https://lists.sourceforge.net/lists/listinfo/alsa-user
