[pulseaudio-tickets] [PulseAudio] #262: Pulseaudio should switch sample rates when possible

PulseAudio trac-noreply at tango.0pointer.de
Thu May 8 07:03:58 PDT 2008


#262: Pulseaudio should switch sample rates when possible
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  Reporter:  Florob   |       Owner:  lennart
      Type:  defect   |      Status:  closed 
  Priority:  normal   |   Milestone:         
 Component:  daemon   |    Severity:  normal 
Resolution:  wontfix  |    Keywords:         
----------------------+-----------------------------------------------------
Comment (by Florob):

 Replying to [comment:4 lennart]:

 > Florob: Resampling won't cause you stuttering music. Not on any hardware
 that is newer than 10 years. However, if we'd switch sampling rates all
 the times when a new client connects and requests a different rate and
 have to close and reopen the audio device for that then you would
 certainly hear that as nasty drop outs. Just think of this case: you play
 two streams at the same time. First you start one with 8khz sampling rate.
 When it is half way through you start one at 44khz. In the world you are
 requesting we'd first open the audio device in 8khz and as soon as the
 second stream starts to close it and reopen it in 44khz. You will
 certainly hear that, the first stream will be interrupted for a short
 time! So in short: what you are requesting will cause bad sound quality.

 I don't know if you realize how bad an impression you make saying the
 problem your users are having does not exist.

 The fact is. No pulseaudio, everything is fine. Pulseaudio with one or
 multiple streams at default sample rate, fine. Pulseaudio with one stream
 not at default sample rate, works with relatively high CPU usage.
 Pulseaudio with two streams not at default sample rate, epic fail.
 And my hardware is newer then 10 years...

 Maybe the SSE change will help but as a matter of fact Pulsaudio is
 useless for me right now. If you say it's not resampling you are welcome
 to suggest what else is causing this trouble.

 I short: I don't really tell you how to write your software and you know
 way more about Linux audio I guess, but please don't tell me I'm imagining
 things, be helpfull instead. Please.

-- 
Ticket URL: <http://www.pulseaudio.org/ticket/262#comment:9>
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