I'm trying to combine media playback with VoIP feature (via Twilio) for iOS 9 and 8.While an audio stream plays in the background, I connect or disconnect a Voice Conference session which results in a volume jump from value X to value Y. This jump can be heard, as well as observed by a [AVAudioSession sharedInstance].outputVolume value change.I would like to prevent this jump and keep the volume at a constant level, unless the user manually decides to change it.Further investigation showed that while AVAudioSession's category is set to AVAudioSessionCategoryPlayAndRecord, switching between modes[[AVAudioSession sharedInstance] setMode:AVAudioSessionModeDefault error:&error]and[[AVAudioSession sharedInstance] setMode:AVAudioSessionModeVoiceChat error:&error]causes the app to operate in two completely separate volume scales, respectively.i.e there a volume for Mode "Default" and a completely unrelated volume for Mode "Voice Chat".AVAudioSession's documentation seems to omit any mention of volume in relation to mode/category switches and I can't find anything relevant on the interwebs...
Appreciate any help.
When setting your play and record category, pass AVAudioSessionCategoryOptionDefaultToSpeaker as an option:
[[AVAudioSession sharedInstance] AVAudioSessionCategoryPlayAndRecord withOptions: AVAudioSessionCategoryOptionDefaultToSpeaker error:&error];
This overrides the default play-and-record behaviour of switching from the speaker to the much quieter receiver. The reason for this being that play-and-record was designed for telephony, where you'd be holding the phone to year ear & presumably wouldn't want to have your hearing damaged by loud sounds.
Megan from Twilio here.
I'm not most familiar with the iOS SDK but you should be able to control connection audio from TCDevice parameters incomingSoundEnabled, outgoingSoundEnabled, and disconnectSoundEnabled as documented here.
Otherwise, I would suggest looking at the sharedInstance properties of AVAudioSession that the Twilio SDK calls upon as demonstrated in this post:
setCategory:error:
setActive:error:
overrideOutputAudioPort:error:
Please let me know if this helps.
Related
I'm using EPSSampler to play some notes in my tiny iOS app. It works nicely, except that the sound is controlled through the ringer settings instead of the system volume settings. The problem is that, if the ringer is turned off, my app makes no sound.
The closest I could find was this SO question but I can't quite translate that solution into mine, as I can't match it to EPSSampler's code. Any insight?
EDIT To clarify, the only code that deals specifically with audio is contained in the EPSSampler class, my app merely instances it, loads an AUSampler preset, and calls the note-playing methods in EPSSampler, so a solution would need to change something in EPSSampler rather than in my app -- that's why I'm not posting any source code.
Turns out this had nothing to do with EPSSampler, and everything with configuring the audio session. The following code did the trick.
NSError *error = nil;
[[AVAudioSession sharedInstance] setCategory:AVAudioSessionCategoryPlayback error:&error];
That'll teach me to RTFM.
For swift(Use when initialising the music):
_ = try AVAudioSession.sharedInstance().setCategory(AVAudioSessionCategoryPlayback)
I am working on an iOS app with WebRTC. During the chat, volume is fine. But if I play an embedded youtube video through WKYTPlayerView, volume of the video is very low. If I disconnect the chat, video volume becomes normal again.
I have tried several things and I have been looking at this issue for few days. Here is how I am setting the category for audio session;
NSError *error = nil;
[[AVAudioSession sharedInstance] setCategory:AVAudioSessionCategoryPlayAndRecord
withOptions: AVAudioSessionCategoryOptionMixWithOthers | AVAudioSessionCategoryOptionDefaultToSpeaker
error: &error];
if (error != nil) {
NSLog(#"Problem setting AVAudioSession to mix with others");
}
Any help is very much appreciated.
AFAIK, there are raised WebRTC issues. Here's 2 of them:
Low sound volume during calls
AGC sets volume to zero
You may want to check the given fix which is putting up a CL to fix the problem in all platforms. See if it also works for you.
Otherwise, you can try using mediastream-gain which is useful for controlling rhe volume of your microphone input before it's sent accross a peer connection in a WebRTC call.
Lastly, you may want to also check this thread for additional insights on application sharing to play YouTube videos.
We are developing a VOIP application and while there is an active call, we want not to allow other apps play music or something (like Whatsapp does). Is there any way of doing it in a normal way, can you help please?
Edit 1: I think we need to start with listening the observer AVAudioSessionInterruptionNotification.
Accepted Answer Edit 2:
When sound interruption begins, try to only active the AudioSession again. This works. Thank you KudoCC.
Here is a link talks about audio category, there is a table in it:
As your app supports VoIP, so it need to play and record audio, and you need interrupt non-mixable apps audio, so AVAudioSessionCategoryPlayAndRecord is the right category. Also you should re-active your audio session when you're playing/recording audio so that the category takes effect.
Try this code in your app to pause the background audio when calls,
[[AVAudioSession sharedInstance] setActive:NO withOptions:AVAudioSessionSetActiveOptionNotifyOthersOnDeactivation error:&error];
It is helpful when other apps uses AVAudioPlayer.
For more detail refer this Link
We write app that records audio in background. We use AVAudioSession with AVAudioSessionCategoryPlayAndRecord category and AVAudioSessionCategoryOptionAllowBluetooth option:
AVAudioSession *session = [AVAudioSession sharedInstance];
[session setCategory:AVAudioSessionCategoryPlayAndRecord withOptions: AVAudioSessionCategoryOptionMixWithOthers | AVAudioSessionCategoryOptionDefaultToSpeaker | AVAudioSessionCategoryOptionAllowBluetooth error:&error];
We noticed the strange issue - when iPhone connected to Multimedia Car Bluetooth system and our app runs, there are shown phone call from device to itself (the call continues during all device connection to bluetooth system). When we close app - the call is ended, when we open app again - call begins and etc.
This issue reproduces on all Multimedia Bluetooth systems. How can we fix it? Thanks
Think you need to add AVAudioSessionCategoryOptionAllowBluetoothA2DP instead of the old HFP profile. The call is used to make older bluetooth devices to work.
With iOS 10, Apple added the option AVAudioSessionCategoryOptionAllowBluetoothA2DP. They also changed the meaning of AudioSessionCategoryOptionAllowBluetooth to only allow output using the HFP Bluetooth profile, which is where you get the low quality audio output.
If you use this new option in place of the AudioSessionCategoryOptionAllowBluetooth option in your code snippet, it will allow high quality output but disallow low quality audio output.
Here's the online documentation for the options, but unfortunately there's no description for the new iOS 10 options online. You can see more detail in the in-code documentation in AVAudioSession.h
https://developer.apple.com/reference/avfoundation/avaudiosessioncategoryoptions?language=objc
Info from: Keep bluetooth sound when initializing AVAudioSession
I am currently working on a PhoneGap application that, upon pressing a button, is supposed to play an 8 seconds long sound clip, while at the same time streaming sound from the microphone over RTMP to a Wowza server through a Cordova plugin using the iOS library VideoCore.
My problem is that (on iOS exclusively) when the sound clip stops playing, the microphone - for some reason - also stops recording sound. However, the stream is still active, resulting in a sound clip on the server side consisting of 8 seconds of microphone input, then complete silence.
Commenting out the line that plays the sound results in the microphone recoding sound without a problem, however we need to be able to play the sound.
Defining the media variable:
_alarmSound = new Media("Audio/alarm.mp3")
Playing the sound and starting the stream:
if(_streamAudio){
startAudioStream(_alarmId);
}
if(localStorage.getItem("alarmSound") == "true"){
_alarmSound.play();
}
It seems to me like there is some kind of internal resource usage conflict occuring when PhoneGap stops playing the sound clip, however I have no idea what I can do to fix it.
I've encountered the same problem on iOS, and I solved it by doing two things:
AVAudioSession Category
In iOS, apps should specify their requirements on the sound resource using the singleton AVAudioSession. When using Cordova there is a plugin that enables you to do this: https://github.com/eworx/av-audio-session-adapter
So for example, when you want to just play sounds you set the category to PLAYBACK:
audioSession.setCategoryWithOptions(
AVAudioSessionAdapter.Categories.PLAYBACK,
AVAudioSessionAdapter.CategoryOptions.MIX_WITH_OTHERS,
successCallback,
errorCallback
);
And when you want to record sound using the microphone and still be able to playback sounds you set the category as PLAY_AND_RECORD:
audioSession.setCategoryWithOptions(
AVAudioSessionAdapter.Categories.PLAY_AND_RECORD,
AVAudioSessionAdapter.CategoryOptions.MIX_WITH_OTHERS,
successCallback,
errorCallback
);
cordova-plugin-media kills the AVAudioSession
The Media plugin that you're using for playback handles both recording and playback in a way that makes it impossible to combine with other sound plugins and the Web Audio API. It deactivates the AVAudioSession each time it has finished playback or recording. Since there is only one such session for your app, this effectively deactivates all sound in your app.
There is a bug registered for this: https://issues.apache.org/jira/browse/CB-11026
Since the bug is still not fixed, and you still want to use the Media plugin, the only way to fix this is to download the plugin code and comment out/remove the lines where the AVAudioSession is deactivated:
[self.avSession setActive:NO error:nil];
I found it took some effort to get the existing answers on this topic working with my code so I'm hoping this helps someone who needs a more explicit solution.
As of version 5.0.2 of the Cordova Media plugin this issue still persists. If you want to use this plugin, the most straightforward solution that I have found is to fork the plugin repository and make the following changes to src/ios/CDVSound.m. After quite some hours looking into this, I was unable to find a working solution without modifying the plugin source, nor was I able to find suitable alternative plugins.
Force session category
The author of the plugin mentioned in Edin's answer explains the issue with the AVAudioSession categories on a similar question. Since changes to CDVSound.m are necessary regardless, I found the following change easier than getting the eworx/av-audio-session-adapter plugin working.
Locate the following lines of code:
NSString* sessionCategory = bPlayAudioWhenScreenIsLocked ? AVAudioSessionCategoryPlayback : AVAudioSessionCategorySoloAmbient;
[self.avSession setCategory:sessionCategory error:&err];
Replace them with:
[self.avSession setCategory:AVAudioSessionCategoryPlayAndRecord error:&err];
Prevent session deactivation
Further more, the changes suggested in Edin's answer are necessary to prevent deactivation of additional audio sessions, however, not all instances need to be removed.
Remove the following line and surrounding conditional statements from the functions audioRecorderDidFinishRecording(), audioPlayerDidFinishPlaying and itemDidFinishPlaying():
[self.avSession setActive:NO error:nil];
The other instances of the code are used for error handling and resource release and, in my experience, do not need to be and should not be removed.
Update: Playback Volume
After apply these changes we experienced issues with low audio volume during playback (while recording was active). Adding the following lines after the respective setCategory lines from above allowed for playback at full volume. These changes are explained in the answer from which this fix was sourced.
[self.avSession overrideOutputAudioPort:AVAudioSessionPortOverrideSpeaker error:nil];
and
[weakSelf.avSession overrideOutputAudioPort:AVAudioSessionPortOverrideSpeaker error:nil];