Apple

---------- Forwarded message ----------
From: Alex Wiltschko <alex.bw@gmail.com>
Date: Mon, Feb 1, 2010 at 9:54 AM
Subject: Re: Playing through speaker, recording through line in
To: Aran Mulholland <email@hidden>

Right, I've done the route override already.

But, for the app I'm building, the "headset" input will actually just be a mono line-in signal.

So, in this case, there are no headphones to play the signal back through.

Again, want to acquire audio from the line input, and output audio from the speaker. Possible?

Alex

On Mon, Feb 1, 2010 at 1:54 AM, Aran Mulholland <email@hidden> wrote:

from the audio session services reference -
http://developer.apple.com/iphone/library/documentation/Audio/Conceptual/AudioSessionProgrammingGuide/Cookbook/Cookbook.html

UInt32 audioRouteOverride = kAudioSessionOverrideAudioRoute_Speaker; // 1

AudioSessionSetProperty (
kAudioSessionProperty_OverrideAudioRoute, // 2
sizeof (audioRouteOverride), // 3
&audioRouteOverride // 4
);

--meaning you can override the output of the audio. I have found doing
this i had to then monitor if the headphone was plugged in etc and
redirect.

The user expects the output to come out the headphones if they are plugged in.

aran