Re: Mirroring Audio Output
Re: Mirroring Audio Output
- Subject: Re: Mirroring Audio Output
- From: William Stewart <email@hidden>
- Date: Mon, 21 May 2007 12:05:24 -0700
As Jeff posted in another post, Jack provides a reasonably good way
to do this (and its opensource)
On 06/05/2007, at 9:32 PM, Rich Wardwell wrote:
This is a relatively old thread, but I have the need to do
something similar -- process audio from other apps in real-time
while still sending the audio to the output device
(unadulterated). I looked (briefly) at the AudioReflectorDriver
sample. It appears to be what I need except that it's a kernel
extension. Is there some way this can be done in the user space?
I believe the RA guys do this with AHP. I'm not trying to capture
the audio in full - but to do some processing in real-time and
extract certain features (so my needs are similar). My hack (for
now) has been running a splitter off the headphones and bringing
the audio back into the line-in. This, uh.. kinda sucks... but
works for the short-term...
Any suggestions would be greatly appreciated.
Rich
Software Developer, Mac Fanatic
On Jan 4, 2007, at 2:10 PM, Jeff Moore wrote:
I should have added that this doesn't mean that it's impossible.
For example, there are several tools out there that pose as a
virtual device to route the audio back out to user space where a
program can then send it to where ever it likes. The
AudioReflectorDriver example code in our SDK provides a simplistic
attempt at this. There are also more complex tools, like Jack for
instance, that do routing and a bunch of other cool things too.
On Jan 4, 2007, at 11:56 AM, Jeff Moore wrote:
If I understand what you are saying, you want to tap the mixed
output data as it gets sent to the hardware, right? If so, the
system does not provide a means to do that.
On Jan 4, 2007, at 9:43 AM, Nick Nallick wrote:
I'm a CoreAudio newbie so I apologize if this is a stupid
question...
I'm trying to mirror all of a computer's audio output to a
second location (e.g., like Airport Express). What I'm trying
to do is to tap into the audio stream at the end of the chain
and do my own processing without affecting the local output.
I've looked at the recording examples, which seem a good place
to start with one exception. These examples take their input
from the system input. What I want to do is to take my input
from the system output. Can somebody point me in the correct
direction?
--
Jeff Moore
Core Audio
Apple
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