Thanks. That seems to be exactly what I was looking for. I am using the ‘play and record’ category. This is an app where the audio quality is important. I would expect most users to be using headphones, but it should function properly even through the main speaker. I didn’t realize that the play and record category would route to the phone speaker by default.
regards, rob > On Mar 21, 2015, at 3:40 AM, [email protected] wrote: > > Message: 5 > Date: Sat, 21 Mar 2015 17:41:30 +1100 > From: Hamish Moffatt <[email protected] > <mailto:[email protected]>> > To: [email protected] <mailto:[email protected]> > Subject: Re: audiograph remoteIO low volume with speaker on iphone > Message-ID: <[email protected] > <mailto:[email protected]>> > Content-Type: text/plain; charset="utf-8"; Format="flowed" > > On 21/03/15 02:39, Robert Carroll wrote: >> Hi, >> >> I am using am audiograph terminating with the remoteIO >> (kAudioUnitSubType_RemoteIO). >> >> Volume output through headphones and on various ipads and non-iphone >> devices is as expected. However, on iphones the speaker output is >> extremely low. >> I have seen other developer references to this issue, but no solutions. >> >> Is there an alternate output AU or a way to access the actual hardware >> output levels? >> >> > > Which output device (route) are you trying to use and which audio > session category do you use? > > We got caught out because the play and record category on iPhone (only) > goes to the phone receiver speaker by default, not the usual speaker. > iPad and iPod Touch don't have that speaker so they don't behave that > way. (iPhone 3GS doesn't seem to behave that way either, but newer ones > do.). And if headphones are connected, those are used instead - probably > Bluetooth, Airplay etc too. > > There is an API in AVAudioSession to override it. > > > Hamish
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