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Curious happening with CAPlayThough
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Curious happening with CAPlayThough


  • Subject: Curious happening with CAPlayThough
  • From: Neil Clayton <email@hidden>
  • Date: Thu, 8 Jan 2009 13:19:27 +1300
  • Comment: DomainKeys? See http://antispam.yahoo.com/domainkeys


I'm seeing some odd behavior that I'd like to clarify please.

I install Soundflower 2ch, and playthru from that to the built in line- output. I setup the SF2ch device to be the default output.

I then go to system preferences Sound page, and repeatedly click on the "Ping" sound (to hear it).
What I hear is that sometimes, it's broken up. As though the last part of the sample is played again briefly.


Curiously, if I play iTunes to the SF2ch (and through CAPlaythrough, to the default output) it's absolutely fine.
I'm pretty sure it's not the SF driver itself (but not 100%, I've not verified the code at all), because it works find if I use GarageBand for the same task (the playthru part). It also works fine with LineIn (a similar util, free, from Rogue Amoeba).


So my question is; is this something to do with the way that the AU is setup? Or to do with flags passed in during the AudioUnitRender? Or something else entirely?


Neil Clayton email@hidden




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