5+App捕获麦克风音频数据

   /**
 * 实时音频流处理类
 * 用于捕获和处理麦克风音频数据
 */
class RealTimeAudioStream {
	constructor(options = {}) {
		// 合并默认配置和用户配置
		this.config = {
			sampleRate: 16000,       // 采样率
			bufferSize: 1024,        // 缓冲区大小
			onAudioData: () => {},   // 音频数据回调
			onError: () => {},       // 错误回调
			...options
		};
		this.audioContext = null;    // Web Audio API上下文
		this.microphone = null;      // 麦克风输入源
		this.processor = null;      // 音频处理节点
		this.isStreaming = false;    // 是否正在采集
		this.audioStream = null;     // 音频流对象
	}

	/**
	 * 启动音频采集
	 * @returns {Promise<boolean>} 是否启动成功
	 */
	async start() {
		try {
			// 获取麦克风权限
			this.audioStream = await navigator.mediaDevices.getUserMedia({
				audio: {
					sampleRate: this.config.sampleRate,
					echoCancellation: true,//消除回声
					noiseSuppression: true,//降噪
					channelCount: 1,//单声道
				}
			});

			// 创建音频上下文
			const AudioContext = window.AudioContext || window.webkitAudioContext;
			this.audioContext = new AudioContext({
				sampleRate: this.config.sampleRate
			});

			// 创建处理管道
			this.microphone = this.audioContext.createMediaStreamSource(this.audioStream);
			this.processor = this.audioContext.createScriptProcessor(
				this.config.bufferSize, 1, 1
			);

			// 设置音频处理回调
			this.processor.onaudioprocess = (event) => {
				if (!this.isStreaming) return;
				// 获取音频数据并传递给回调函数
				const audioData = event.inputBuffer.getChannelData(0);
				this.config.onAudioData(new Float32Array(audioData));
			};

			// 连接音频节点
			this.microphone.connect(this.processor);
			this.processor.connect(this.audioContext.destination);

			this.isStreaming = true;
			console.log("音频采集已启动");
			return true;
		} catch (error) {
			console.error("音频启动失败:", error);
			this.config.onError(error);
			return false;
		}
	}

	/**
	 * 停止音频采集
	 */
	stop() {
		if (!this.isStreaming) return;

		this.isStreaming = false;
		// 断开所有音频节点连接
		if (this.processor) this.processor.disconnect();
		if (this.microphone) this.microphone.disconnect();
		// 停止音频轨道
		if (this.audioStream) {
			this.audioStream.getTracks().forEach(track => track.stop());
		}
		// 关闭音频上下文
		if (this.audioContext) {
			this.audioContext.close();
		}
		console.log("音频采集已停止");
	}
}

开始采集音频时调用：

`async function startAudioCapture() {
	if (audioStream) return;  // 避免重复启动

	// 创建并启动音频流
	audioStream = new RealTimeAudioStream({
		onAudioData: (data) => {
			// 只打印前3个样本值避免刷屏
			console.log("音频数据:",
				Array.from(data.slice(0, 3)).map(v => v.toFixed(4)));
		},
		onError: (err) => {
			console.error("音频错误:", err);
		}
	});

	await audioStream.start();
}`

停止采集音频 function stopAudioCapture() { if (audioStream) { audioStream.stop(); audioStream = null; } }

监听到的音频流