What kind of routes could I get back from kAudioSessionProperty_AudioRoute property?

Question

Apple guy tried to be funny and wrote in the docs:

("Headphone," "Speaker," etc.)

What kind of return values are possible in reality?

score 11 · Answer 1 · answered Feb 02 '11 at 01:34

I ran 'strings' on the CoreMedia framework (iOS4.2 SDK), and the following strings seem reasonable and are grouped together:

ReceiverAndMicrophone
HeadsetInOut
HeadphonesAndMicrophone
SpeakerAndMicrophone
HeadsetBT
LineInOut
Default

Command was:

strings -a -o CoreMedia | less

# CoreMedia is from /Developer/Platforms/iPhoneOS.platform/Developer \
# /SDKs/iPhoneOS4.2.sdk/System/Library/Frameworks/CoreMedia.framework

score 3 · Accepted Answer · answered May 25 '10 at 19:36

3

He wasn't being funny, those are actual values. The only one I've seen that he didn't outline is "LineOut"

answered May 25 '10 at 19:36

Jamie Pinkham

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the funny part is the etc., so you have to guess what other strings might be returned. – dontWatchMyProfile May 25 '10 at 22:50
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More funny is, on iOS 3.1.2 the values change, now we have: "SpeakerAndMicrophone" and so on... Nice compatibility folks. – SEQOY Development Team Aug 26 '10 at 01:57

dnaxxx · Answer 3 · 2010-10-12T13:28:48.573

2

According to http://lists.apple.com/archives/coreaudio-api/2009/Jan/msg00084.html there are also LineOut, HeadsetInOut, ReceiverAndMicrophone, HeadphonesAndMicrophone, but the guy who asked whether there are more values received no answer.

edited Oct 12 '10 at 13:28

answered Oct 07 '10 at 10:44

dnaxxx

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score 1 · Answer 4 · answered Jun 04 '11 at 05:35

1

I just got MicrophoneWired from it. (I actually have a special piece of hardware plugged in that is a temperature probe, but we are using it through the headphone jack).

Then I got MicrophoneBuiltIn with nothing plugged in. This is on an ipod touch with 4.3 by the way.

answered Jun 04 '11 at 05:35

broughten

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I get the same (MicrophoneWired / MicrophoneBuiltIn) when I've used kAudioSessionCategory_RecordAudio as my audio category and I plug and unplug a headset (headphones with built-in mic). – Ben Clayton Aug 09 '12 at 16:18

score 0 · Answer 5 · answered Nov 02 '12 at 18:37

0

How is HeadphonesBT different from HeadsetBT ? My app could successfully use the HeadsetBT device to send and receive audio while HeadphonesBT failed to do anything. This is on iOs6

answered Nov 02 '12 at 18:37

FatalError

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score 0 · Answer 6 · answered Sep 08 '11 at 15:24

The values provided by l8nite above are reserved for when your audio session is configured for both input and output. Other values used when you're only doing audio out: (I used the same trick as l8nite - thanks!)

LineOut

HeadphonesBT (used for Bluetooth audio output - observed this hooked up to via bluetooth to a car audio system)

AirTunes (used for AirPlay output)

What kind of routes could I get back from kAudioSessionProperty_AudioRoute property?

6 Answers6

Linked