mic_stream: 0.4.0

Flutter Plugin Provides a tool to get the microphone input as 8 or 16 bit PCM Stream.

About mic_stream:

As Flutter still lacks some functionality, this plugin aims to provide the possibility to easily get an audio stream from the microphone, using a simple java and swift implementation.

How to use:

The plugin provides one method:

Future<Stream<UInt8List>> MicStream.microphone({options})

Listening to this stream starts the audio recorder while cancelling the subscription stops the stream.

The plugin also provides information about some properties:

Future<double> sampleRate = await MicStream.sampleRate;
Future<int> bitDepth = await MicStream.bitDepth;
Future<int> bufferSize = await MicStream.bufferSize;

Permissions

Make sure you have microphone recording permissions enabled for your project. To do so, add this line to the AndroidManifest.xml:

<uses-permission android:name="android.permission.RECORD_AUDIO"/>

In the Info.plist:

<key>NSMicrophoneUsageDescription</key>
<string>Microphone access required</string>

Example:

// Init a new Stream
Stream<List<int>> stream = await MicStream.microphone(sampleRate: 44100);

// Start listening to the stream
StreamSubscription<List<int>> listener = stream.listen((samples) => print(samples));
// Cancel the subscription
listener.cancel()

Note: This plugin is still under development, and some APIs might not be available yet. Feedback and Pull Requests are most welcome!

Libraries

mic_stream