Re: [Alsa-user] plughw versus hw
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From: Vladimir M. <mosgalin@VM10124.spb.edu> - 2011-06-21 14:04:59
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Hi Pierre Habraken! On 2011.06.21 at 15:42:14 +0200, Pierre Habraken wrote next: > Thanks to you (and to Vladimir) I understand better now why I need > plughw to play 24bits files. > > If it's not taking too much of your time, I'd have one more question: > When I try to play a 24bits/192KHz file using plughw, aplay -v displays > the data below, without any error message, but nothing is sent to the > DAC. Is this because the Xonar DX Linux driver does not take in account > 192KHz sounds ? But in that case why Alsa does not report any error > message ? > Check your DAC specification, it probably can accept 192 khz streams only at 16 bit, and for 24 bits are limited to 96khz. It's quite typical and probably is S/PDIF bandwidth limitation (not sure); you have to use HDMI to get more. There is no error because 24/192 streams in itself work fine, and DAC chip on audio card can process that stream - it's just that there is trouble either sending it through S/PDIF or receiving by external DAC, which is outside of the scope of your card, so there is no error. -- Vladimir |