Recorder

This example can record the user's microphone signal into an audio file using RecorderNode. The recorded audio file is played back using AudioPlayerNode.

Swift

import SwitchboardSDK

class RecorderExample {

    let audioGraph = SBAudioGraph()
    let recorderNode: SBRecorderNode
    let audioPlayerNode = SBAudioPlayerNode()
    let audioEngine = SBAudioEngine()

    var currentFormat: SBCodec = .wav

    init() {
        recorderNode = SBRecorderNode(
            name: "TestRecorderNode",
            recordingSampleRate: 48000,
            numberOfRecordedChannels: 2
        )

        audioGraph.addNode(recorderNode)
        audioGraph.addNode(audioPlayerNode)
        audioGraph.connect(audioGraph.inputNode, to: recorderNode)
        audioGraph.connect(audioPlayerNode, to: audioGraph.outputNode)

        audioEngine.microphoneEnabled = true
        audioEngine.start(audioGraph)
    }

    func startRecording() {
        recorderNode.start()
    }

    func stopRecording() {
        recorderNode.stop("fileName", withFormat: currentFormat)
        audioPlayerNode.load(recorderNode.getFilePath(), withFormat: currentFormat)
    }

    func startPlayback() {
        audioPlayerNode.play()
    }

    func stopPlayback() {
        audioPlayerNode.stop()
    }
}

Kotlin

import com.synervoz.switchboard.sdk.AudioEngine
import com.synervoz.switchboard.sdk.Codec
import com.synervoz.switchboard.sdk.audioengine.AudioEngine
import com.synervoz.switchboard.sdk.audiograph.AudioGraph
import com.synervoz.switchboard.sdk.audiographnodes.AudioPlayerNode
import com.synervoz.switchboard.sdk.audiographnodes.RecorderNode

class SineWaveGeneratorExample {

    val audioEngine = AudioEngine()
    val audioGraph = AudioGraph()
    val recorderNode = RecorderNode("TestRecorderNode")
    val audioPlayerNode = AudioPlayerNode()

    init {
        audioGraph.addNode(recorderNode)
        audioGraph.addNode(audioPlayerNode)
        audioGraph.connect(audioGraph.inputNode, recorderNode)
        audioGraph.connect(audioPlayerNode, audioGraph.outputNode)
        audioEngine.start(audioGraph)
    }

    fun startRecording() {
        recorderNode.start()
    }

    fun stopRecording() {
        recorderNode.stop("fileName", currentFormat)
        audioPlayerNode.load(recorderNode.getFilePath(), currentFormat)
    }

    fun startPlayback() {
        audioPlayerNode.play()
    }

    fun stopPlayback() {
        audioPlayerNode.stop()
    }
}