Beyond the core audio controls, the Video SDK for macOS offers several advanced audio features.
Select an audio device
Desktop setups often have several microphones and speakers attached. Enumerate them with getMicList and getSpeakerList, then activate one with selectMic or selectSpeaker.
Swift
Objective-C
let audioHelper = ZMVideoSDK.shared()?.getAudioHelper()
// Enumerate devices.
let micList = audioHelper?.getMicList()
let speakerList = audioHelper?.getSpeakerList()
// Activate a specific device by ID and name.
audioHelper?.selectMic("micDeviceID", deviceName: "micDeviceName")
audioHelper?.selectSpeaker("speakerDeviceID", deviceName: "speakerDeviceName")
ZMVideoSDKAudioHelper *audioHelper = [[ZMVideoSDK sharedVideoSDK] getAudioHelper];
// Enumerate devices.
NSArray<ZMVideoSDKMicDevice *> *micList = [audioHelper getMicList];
NSArray<ZMVideoSDKSpeakerDevice *> *speakerList = [audioHelper getSpeakerList];
// Activate a specific device by ID and name.
[audioHelper selectMic:@"micDeviceID" deviceName:@"micDeviceName"];
[audioHelper selectSpeaker:@"speakerDeviceID" deviceName:@"speakerDeviceName"];
Subscribe to raw audio data
To access raw audio frames, subscribe through the ZMVideoSDKAudioHelper. After subscribing, the SDK delivers audio frames to your delegate's raw-data callbacks.
Swift
Objective-C
let audioHelper = ZMVideoSDK.shared()?.getAudioHelper()
audioHelper?.subscribe()
// When you no longer need raw audio:
audioHelper?.unSubscribe()
ZMVideoSDKAudioHelper *audioHelper = [[ZMVideoSDK sharedVideoSDK] getAudioHelper];
[audioHelper subscribe];
// When you no longer need raw audio:
[audioHelper unSubscribe];
For the raw audio callbacks and how to process mixed, per-user, and shared audio, see Receive raw data.