移动端使用recorder录音时会播放

我在使用recorder录音的同时，不知道为啥会播放，该怎样关掉哎

window.URL = window.URL || window.webkitURL
navigator.getUserMedia = navigator.getUserMedia || navigator.webkitGetUserMedia || navigator.mozGetUserMedia || navigator.msGetUserMedia
let HZRecorder = function (stream, config) {
    // const that = this;
    config = config || {}
    config.sampleBits = config.sampleBits || 16 // 采样数位 8, 16
    config.sampleRate = config.sampleRate || 16000 // 采样率(1/6 44100)
    let context = new (window.webkitAudioContext || window.AudioContext)()
    let audioInput = context.createMediaStreamSource(stream)
    let createScript = context.createScriptProcessor || context.createJavaScriptNode
    let recorder = createScript.apply(context, [4096, 1, 1])
    let transcount = 0;
    let pos = 0;
    let buffer48 = new Float32Array(1024 * 3);
    let buffer16 = new Float32Array(buffer48.length / 3);
    let audioData = {
        size: 0, // 录音文件长度
        buffer: [], // 录音缓存
        inputSampleRate: context.sampleRate, // 输入采样率
        inputSampleBits: 16, // 输入采样数位 8, 16
        outputSampleRate: config.sampleRate, // 输出采样率
        oututSampleBits: config.sampleBits, // 输出采样数位 8, 16
        input: function (data) {
            this.buffer.push(new Float32Array(data))
            this.size += data.length
        },
        compress: function () { // 合并压缩
            // 合并
            let data = new Float32Array(this.size)
            let offset = 0
            for (let i = 0; i < this.buffer.length; i++) {
                data.set(this.buffer[i], offset)
                offset += this.buffer[i].length
            }
            // 压缩
            let compression = parseInt(this.inputSampleRate / this.outputSampleRate)
            let length = data.length / compression
            let result = new Float32Array(length)
            let index = 0;
            let j = 0
            while (index < length) {
                result[index] = data[j]
                j += compression
                index++
            }
            return result
        },
        encodeWAV: function () {
            let sampleRate = Math.min(this.inputSampleRate, this.outputSampleRate)
            let sampleBits = Math.min(this.inputSampleBits, this.oututSampleBits)
            let bytes = this.compress()
            let dataLength = bytes.length * (sampleBits / 8)
            let buffer = new ArrayBuffer(44 + dataLength)
            let data = new DataView(buffer)
            let channelCount = 1 // 单声道
            let offset = 0
            let writeString = function (str) {
                for (let i = 0; i < str.length; i++) {
                    data.setUint8(offset + i, str.charCodeAt(i))
                }
            }
            // 资源交换文件标识符
            writeString('RIFF');
            offset += 4
            // 下个地址开始到文件尾总字节数,即文件大小-8
            data.setUint32(offset, 36 + dataLength, true);
            offset += 4
            // WAV文件标志
            writeString('WAVE');
            offset += 4
            // 波形格式标志
            writeString('fmt ');
            offset += 4
            // 过滤字节,一般为 0x10 = 16
            data.setUint32(offset, 16, true);
            offset += 4
            // 格式类别 (PCM形式采样数据)
            data.setUint16(offset, 1, true);
            offset += 2
            // 通道数
            data.setUint16(offset, channelCount, true);
            offset += 2
            // 采样率,每秒样本数,表示每个通道的播放速度
            data.setUint32(offset, sampleRate, true);
            offset += 4
            // 波形数据传输率 (每秒平均字节数) 单声道×每秒数据位数×每样本数据位/8
            data.setUint32(offset, channelCount * sampleRate * (sampleBits / 8), true);
            offset += 4
            // 快数据调整数 采样一次占用字节数 单声道×每样本的数据位数/8
            data.setUint16(offset, channelCount * (sampleBits / 8), true);
            offset += 2
            // 每样本数据位数
            data.setUint16(offset, sampleBits, true);
            offset += 2
            // 数据标识符
            writeString('data');
            offset += 4
            // 采样数据总数,即数据总大小-44
            data.setUint32(offset, dataLength, true);
            offset += 4
            // 写入采样数据
            if (sampleBits === 8) {
                for (let i = 0; i < bytes.length; i++, offset++) {
                    let s = Math.max(-1, Math.min(1, bytes[i]))
                    let val = s < 0 ? s * 0x8000 : s * 0x7FFF
                    val = parseInt(255 / (65535 / (val + 32768)))
                    data.setInt8(offset, val, true)
                }
            } else {
                for (let i = 0; i < bytes.length; i++, offset += 2) {
                    let s = Math.max(-1, Math.min(1, bytes[i]))
                    data.setInt16(offset, s < 0 ? s * 0x8000 : s * 0x7FFF, true)
                }
            }
            return new Blob([data], {
                type: 'audio/wav'
            })
        }
    }
    // 开始录音
    this.start = function () {
        console.log('开始录音')
        audioInput.connect(recorder)
        recorder.connect(context.destination)
    }
    // 停止
    this.stop = function () {
        console.log('停止')
        recorder.disconnect()
    }
    // 获取音频文件
    this.getBlob = function () {
        console.log('获取音频')
        this.stop()
        return audioData.encodeWAV()
    }
    // // 回放
    // this.play = function (audio) {
    //     console.log('播放')
    //     audio.src = window.URL.createObjectURL(this.getBlob())
    // }
    // 上传
    this.upload = function (url, callback) {
        let fd = new FormData()
        fd.append('audioData', this.getBlob())
        let xhr = new XMLHttpRequest()
        /* eslint-disable */
        if (callback) {
            xhr.upload.addEventListener('progress', function (e) {
                callback('uploading', e)
            }, false)
            xhr.addEventListener('load', function (e) {
                callback('ok', e)
            }, false)
            xhr.addEventListener('error', function (e) {
                callback('error', e)
            }, false)
            xhr.addEventListener('abort', function (e) {
                callback('cancel', e)
            }, false)
        }
        /* eslint-disable */
        xhr.open('POST', url)
        xhr.send(fd)
    }

    //初始化canvas绘图画布，注意，这里就是你将要在试图上输出的canvas区域
    let canvas = document.getElementById('mycanvas');
    let width = canvas.width;
    let height = canvas.height;
    let g = canvas.getContext("2d");
    g.strokeStyle = "#409EFF";
    g.translate(0.5, height / 2 + 0.5);
    // 音频采集
    recorder.onaudioprocess = function (e) {
        // 获取输入和输出的缓冲区
        audioData.input(e.inputBuffer.getChannelData(0))
        //获取输入和输出的数据缓冲区(48000,32,1)
        let input = e.inputBuffer.getChannelData(0);
        // 输出设置为空,消除混音
        let output = e.outputBuffer.getChannelData(0);
        //缓存数据
        for (let n = 0; n < input.length; n++) {
            buffer48[pos++] = input[n];
        }
        transcount++;
        if (transcount == 3) {
            //重置参数
            transcount = 0;
            pos = 0;
            //48k转16k
            let offset = 0;
            for (let k = 0; k < buffer48.length; k += 3) {
                buffer16[offset++] = buffer48[k];
            }
            //32转16位
            let dataAsInt16Array = new Int16Array(buffer16.length);
            for (let i = 0; i < input.length; i++) {
                let s = Math.max(-1, Math.min(1, buffer16[i]));
                if (s < 0) {
                    dataAsInt16Array[i] = 0x8000 * s;
                } else {
                    dataAsInt16Array[i] = 0x7fff * s;
                }
            }
        }
        for (let i = 0; i < input.length; i++) {
            output[i] = input[i];
        }
        //将缓冲区的数据绘制到Canvas上
        g.clearRect(-0.5, -height / 2 - 0.5, width, height);
        g.beginPath();
        for (let i = 0; i < width; i++)
            //这里是图像输出算法，可以写自己想输出的效果
            g.lineTo(i, height / 2 * output[(output.length * i / width) | 0]);
        g.stroke();
    }
}
// 抛出异常
HZRecorder.throwError = function (message) {
    alert(message)
    throw new function () {
        this.toString = function () {
            return message
        }
    }()
}
// 是否支持录音
HZRecorder.canRecording = (navigator.getUserMedia != null)
// 获取录音机
HZRecorder.get = function (callback, config) {
    if (callback) {
        if (navigator.getUserMedia) {
            navigator.getUserMedia({
                audio: true
            } // 只启用音频
                ,
                function (stream) {
                    let rec = new HZRecorder(stream, config)
                    callback(rec)
                },
                function (error) {
                    switch (error.code || error.name) {
                        case 'PERMISSION_DENIED':
                        case 'PermissionDeniedError':
                            HZRecorder.throwError('用户拒绝提供信息。')
                            break
                        case 'NOT_SUPPORTED_ERROR':
                        case 'NotSupportedError':
                            HZRecorder.throwError('浏览器不支持硬件设备。')
                            break
                        case 'MANDATORY_UNSATISFIED_ERROR':
                        case 'MandatoryUnsatisfiedError':
                            HZRecorder.throwError('无法发现指定的硬件设备。')
                            break
                        default:
                            HZRecorder.throwError('无法打开麦克风。异常信息:' + (error.code || error.name))
                            break
                    }
                })
        } else {
            HZRecorder.throwErr('当前浏览器不支持录音功能。');
            return
        }
    }
}
export default HZRecorder

调用录音开始时，一录音就播放出来了

这段代码是一个录音程序，使用的是HTML5 Web Audio API。它允许您录制麦克风音频并将其保存为WAV文件。

代码中包含了一些常量和变量的定义，例如“config.sampleBits”和“config.sampleRate”，用于设置录制音频的采样位数和采样率。此外还有“navigator.getUserMedia”方法用于获取用户的媒体访问控制（Media Access Control, MAC）以获取麦克风音频流，并使用“window.URL”或“window.webkitURL”创建一个URL对象以播放音频。

主要功能实现在“HZRecorder”对象中，它将音频流传递给“context.createMediaStreamSource(stream)”方法并将其转换为可处理的音频数据。它使用“context.createScriptProcessor”或“context.createJavaScriptNode”方法创建一个脚本处理器节点，并将其附加到音频输入源上。然后，它定义了一些变量，例如“transcount”、“pos”、“buffer48”和“buffer16”，这些变量用于存储和处理音频数据。最后，“HZRecorder”对象定义了一些方法，例如“input”、“compress”和“encodeWAV”，用于将录制的音频数据转换为WAV格式的音频文件。

如果您想停止播放音频，可以调用“audio.pause()”方法。如果您想重新开始播放，可以调用“audio.play()”方法。

参考GPT和自己的思路，这个问题可能是由于在录音时使用了浏览器的默认音频输出设备，而导致录音的音频信号被放回到了音频输入设备，从而导致了回声的产生。

要解决这个问题，可以尝试在录音时关闭浏览器的默认音频输出设备。这可以通过以下几种方式实现：

尝试使用 MediaStreamConstraints 对象中的 audio 属性中的 echoCancellation 参数来关闭回声消除：

navigator.mediaDevices.getUserMedia({
  audio: {
    echoCancellation: false
  }
})

在录音开始前，将浏览器的默认音频输出设备设置为静音，这可以通过以下方式实现：

navigator.mediaDevices.getUserMedia({ audio: true }).then(function (stream) {
  // Mute the default audio output
  var audioTracks = stream.getAudioTracks();
  for (var i = 0, l = audioTracks.length; i < l; i++) {
    audioTracks[i].enabled = false;
  }
  
  // Start recording
  // ...
});

尝试使用 AudioContext 中的 createMediaStreamDestination 方法来创建一个虚拟音频输出设备，并将录音的音频信号发送到该设备中，以避免回声的产生：

navigator.mediaDevices.getUserMedia({ audio: true }).then(function (stream) {
  var context = new AudioContext();
  
  // Create a virtual audio output device
  var destination = context.createMediaStreamDestination();
  var source = context.createMediaStreamSource(stream);
  source.connect(destination);
  
  // Start recording
  // ...
});

如果对您有帮助，请给与采纳，谢谢。

在代码中没有看到播放音频的相关代码，我猜测可能是录音的时候触发了移动端的自动播放功能。

以下答案基于ChatGPT与GISer Liu编写：
在录音机停止录音后，调用MediaRecorder的stop方法来停止录音，这样就不会再播放录音了。

例如，在上面的代码中，你可以添加以下代码来停止录音：

let mediaRecorder = new MediaRecorder(stream);
mediaRecorder.start();
// 在需要停止录音的地方调用 stop 方法
mediaRecorder.stop();

注意：stop方法停止录音后，你仍然可以使用MediaRecorder实例来访问录音数据。你可以使用MediaRecorder的ondataavailable事件处理程序来处理录音数据。例如：

mediaRecorder.ondataavailable = function(event) {
// 处理录音数据
var audioBlob = event.data;
};

提供参考实例：https://www.likecs.com/show-305971538.html

你可以尝试调用 stream.getTracks() 方法获取当前 MediaStream 中的所有轨道（track），并逐个关闭它们，从而停止录音和播放。

以下是修改后的代码：

window.URL = window.URL || window.webkitURL
navigator.getUserMedia = navigator.getUserMedia || navigator.webkitGetUserMedia || navigator.mozGetUserMedia || navigator.msGetUserMedia
let HZRecorder = function (stream, config) {
    // const that = this;
    config = config || {}
    config.sampleBits = config.sampleBits || 16 // 采样数位 8, 16
    config.sampleRate = config.sampleRate || 16000 // 采样率(1/6 44100)
    let context = new (window.webkitAudioContext || window.AudioContext)()
    let audioInput = context.createMediaStreamSource(stream)
    let createScript = context.createScriptProcessor || context.createJavaScriptNode
    let recorder = createScript.apply(context, [4096, 1, 1])
    let transcount = 0;
    let pos = 0;
    let buffer48 = new Float32Array(1024 * 3);
    let buffer16 = new Float32Array(buffer48.length / 3);
    let audioData = {
        size: 0, // 录音文件长度
        buffer: [], // 录音缓存
        inputSampleRate: context.sampleRate, // 输入采样率
        inputSampleBits: 16, // 输入采样数位 8, 16
        outputSampleRate: config.sampleRate, // 输出采样率
        oututSampleBits: config.sampleBits, // 输出采样数位 8, 16
        input: function (data) {
            this.buffer.push(new Float32Array(data))
            this.size += data.length
        },
        compress: function () { // 合并压缩
            // 合并
            let data = new Float32Array(this.size)
            let offset = 0
            for (let i = 0; i < this.buffer.length; i++) {
                data.set(this.buffer[i], offset)
                offset += this.buffer[i].length
            }
            // 压缩
            let compression = parseInt(this.inputSampleRate / this.outputSampleRate)
            let length = data.length / compression
            let result = new Float32Array(length)
            let index = 0;
            let j = 0
            while (index < length) {
                result[index] = data[j]
                j += compression
                index++
            }
            return result
        },
        encodeWAV: function () {
            let sampleRate = Math.min(this.inputSampleRate, this.outputSampleRate)
            let sampleBits = Math.min(this.inputSampleBits, this.oututSampleBits)
            let bytes = this.compress()
            let dataLength = bytes.length * (sampleBits / 8)
            let buffer = new ArrayBuffer(44 + dataLength)
            let data = new DataView(buffer)
            let channelCount = 1 // 单声道
            let offset = 0
            let writeString = function (str) {
                for (let i = 0; i < str.length; i++) {
                    data.setUint8(offset + i, str.charCodeAt(i))
                }
            }
            // 资源交换文件标识符
            writeString('RIFF');
            offset += 4
            // 将Float32的音频数据转换为16位整型
            let s = Math.max(-1, Math.min(1, data[i]))
            let val = s < 0 ? s * 0x8000 : s * 0x7FFF
            val = parseInt(255 / (65535 / (val + 32768)))
            data[offset] = val
            offset++
        }
        return buffer
    }
}
// 开始录音
this.start = function () {
    audioInput.connect(recorder)
    recorder.connect(context.destination)
}
// 停止录音
this.stop = function () {
    recorder.disconnect()
}
// 获取音频文件
this.getBlob = function () {
    this.stop()
    return new Blob([audioData.encodeWAV()])
}
// 回放音频
this.play = function (audio) {
    audio.src = window.URL.createObjectURL(this.getBlob())
}
// 上传音频
this.upload = function (url, callback) {
    let fd = new FormData()
    fd.append('audioData', this.getBlob())
    let xhr = new XMLHttpRequest()
    if (callback) {
        xhr.upload.addEventListener('progress', function (e) {
            callback('uploading', e)
        }, false)
        xhr.addEventListener('load', function (e) {
            callback('ok', e)
        }, false)
        xhr.addEventListener('error', function (e) {
            callback('error', e)
        }, false)
        xhr.addEventListener('abort', function (e) {
            callback('cancel', e)
        }, false)
    }
    xhr.open('POST', url)
    xhr.send(fd)
}
// 音频采集
recorder.onaudioprocess = function (e) {
    let buffer = e.inputBuffer.getChannelData(0)
    audioData.input(buffer)
}
        // 处理播放
        let blob = new Blob([this.encodeWAV()], { type: 'audio/wav' })
        let audioURL = window.URL.createObjectURL(blob)
        let audio = new Audio(audioURL)
        audio.play()
    }
}
// 音频采集
recorder.onaudioprocess = function (e) {
    let float32buffer = e.inputBuffer.getChannelData(0)
    buffer48.set(float32buffer, pos)
    pos += float32buffer.length
    if (pos >= buffer48.length) {
        let tmpBuffer = new Float32Array(buffer48.length)
        tmpBuffer.set(buffer48)
        HZRecorder.recBuffers[transcount] = tmpBuffer
        pos = 0
        transcount++
    }
}
this.start = function () {
    audioData.buffer = []
    audioData.size = 0
    recorder.connect(context.destination)
}
this.stop = function () {
    recorder.disconnect()
}
this.getBlob = function () {
    return audioData.encodeWAV()
}
this.clear = function () {
    audioData.buffer = []
    audioData.size = 0
}
this.play = function () {
    audioData.play()
}
this.download = function (name) {
    let blob = new Blob([this.getBlob()], { type: 'audio/wav' })
    let url = window.URL.createObjectURL(blob)
    let a = document.createElement('a')
    a.style.display = 'none'
    a.href = url
    a.download = name || 'output.wav'
    document.body.appendChild(a)
    a.click()
    window.URL.revokeObjectURL(url)
}
this.getBase64 = function () {
    let bytes = audioData.compress()
    let binary = ''
    for (let i = 0; i < bytes.length; i++) {
        binary += String.fromCharCode(Math.round((bytes[i] + 1) / 2 * 255))
    }
    return 'data:audio/wav;base64,' + window.btoa(binary)
}
HZRecorder.recBuffers = []
HZRecorder.mergeBuffers = function (buffers, len) {
let result = new Float32Array(len)
let offset = 0
for (let i = 0; i < buffers.length; i++) {
result.set(buffers[i], offset)
offset += buffers[i].length
}
return result
}
HZRecorder.interleave = function (inputL, inputR) {
let length = inputL.length + inputR.length
let result = new Float32Array(length)
let index = 0
let inputIndex = 0
while (index < length) {
result[index++] = inputL[inputIndex]
result[index++] = inputR[inputIndex]
inputIndex++
}
return result
}
HZRecorder.writeUTFBytes = function (view, offset, string) {
let length = string.length
for (let i = 0; i < length; i++) {
view.setUint8(offset + i, string.charCodeAt(i))
}
}

navigator.getUserMedia({ audio: true }, function (stream) {
let recorder = new HZRecorder(stream)
document.getElementById('start').onclick = function () {
recorder.start()
}
document.getElementById('stop').onclick = function () {
recorder.stop()
recorder.download()
}
}, function (e) {
console.error(e)
})

没解决