On Fri, 25 Dec 2009 00:39:52 -0700 "Bearcat M. Sandor" <hometheater@xxxxxxxxxxxxxxx> wrote: > sound card: IntelHD > alsa version: 2.6.31-r6 > pulseaudio version: 0.9.19 > mpd version: 0.15.5 > disto: gentoo amd64 > Sound file format: Flac > > Folks, > > What i would like to be able to do is to play music files at their > native rates. I realize that my sound card's rates begin at 48khz, so > 44.1khz files may have to be upsampled in any case. That's not > preferable but that's alright. However, i'd like to be able to play 96 > khz files and 192 khz files at their respective rates with out resulting > to upsampling. If i have to upsample everything to 192khz to avoid > downsampling files to 48 khz i'll do that but it's not ideal. > > So, i'm running an mpd player which feeds into pulse audio which feeds > into alsa. Do i need to configure all 3 to handle this or should it be > working "out of the box"? > > I've looked around for some sort of display which will tell me at what > rate the files are being played in but i can't find one and i don't know > if for instance, mpd is passing them in 96 khz or 192 and pulse is down > converting, or if mpd and pulse are passing them in 96 khz or 192 and > alsa is down converting or something. How can i verify this is working > when it's set up? Going by ear may not be reliable. > > Am i best off just setting up the system to upconvert to 192k? I think > that might cause distortion. Right? If so, i'd need set that up in mpd, > and pulse and alsa right? > > Any ideas or pointers would be appreciated. I'll happily give more info > if wanted. > > Thanks a lot, > While playing in my case (Intel "Azalia" type of card) I see this: " cat /proc/asound/card0/pcm0p/sub0/hw_params access: RW_INTERLEAVED format: S16_LE subformat: STD channels: 2 rate: 44100 (44100/1) period_size: 4096 buffer_size: 131072 OSS format: S16_LE OSS channels: 2 OSS rate: 44100 OSS period bytes: 16384 OSS periods: 32 OSS period frames: 4096 ". Maybe you too have the 'hw_params' file and can see "rate: 44100 (44100/1)". Regards, Sergei. ------------------------------------------------------------------------------ This SF.Net email is sponsored by the Verizon Developer Community Take advantage of Verizon's best-in-class app development support A streamlined, 14 day to market process makes app distribution fast and easy Join now and get one step closer to millions of Verizon customers http://p.sf.net/sfu/verizon-dev2dev _______________________________________________ Alsa-user mailing list Alsa-user@xxxxxxxxxxxxxxxxxxxxx https://lists.sourceforge.net/lists/listinfo/alsa-user
