Re: Recording system audio
Re: Recording system audio
- Subject: Re: Recording system audio
- From: Jeff Moore <email@hidden>
- Date: Thu, 13 Mar 2008 12:29:56 -0700
Just FYI, the AudioReflectorDriver and SoundFlower do the basically
the same thing. They take the audio from their output side and present
it back to the system through it's input side.
Did Cycling'74 ever fix the timing issues in SoundFlower? I recall a
while back that this driver had a wandering clock due to the way it
did it's timing (which I think was based on some older driver sample
code we put out). I last looked at it a few years ago, so take it with
grain of salt.
On Mar 13, 2008, at 12:18 PM, Philippe GRUCHET wrote:
You could also take a look at the Soundflower source code:
http://cycling74.com/downloads/soundflower
Bye,
PG
On Mar 13, 2008, at 10:16 AM, Martin Redington wrote:
I'd like to record the system audio, on 10.4 and 10.5
Looking at other apps that do this, they commonly seem to install
a kernel extension which create a pseudo audio device.
Is this approach documented anywhere in the sample code or docs?
It seems to be common enough to qualify as an idiom, but I can't
seem to uncover any direct references to it.
Any pointers will be gratefully received ...
Jeff Moore replied:
There really aren't any docs about doing what you want to do. The
system doesn't really make it particularly easy. Even using a fake
device has it's drawbacks (see some of my recent posts). At any
rate, the closest we have for sample code in this area are the two
sample drivers in /Developer/Examples/CoreAudio/HAL. The sample
kernel audio driver is the AudioReflectorDriver project. The sample
user-land audio driver is the SampleHardwarePlugIn project.
--
Jeff Moore
Core Audio
Apple
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