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C语言在Windows中播放特定频率的声音

1.C语言在Windows中使用Beep播放特定频率的声音

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#include <windows.h>
#include <stdio.h>

int main() {
    // 播放432Hz的声音，持续0.5秒
    Beep(432, 500);

    // 播放440Hz的声音，持续0.5秒
    Beep(440, 500);

    // 播放1000Hz的声音，持续0.5秒
    Beep(1000, 500);

    // 播放2000Hz的声音，持续0.5秒
    Beep(2000, 500);

    return 0;
}

2.C语言在Windows中使用waveOut播放特定频率的声音

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#include <windows.h>
#include <math.h>
#include <stdio.h>

#pragma comment(lib, "winmm.lib")

// 定义 M_PI
#ifndef M_PI
#define M_PI 3.14159265358979323846
#endif

#define SAMPLE_RATE 44100 // 采样率
#define DURATION 1         // 持续时间（秒）
#define FREQUENCY 432      // 频率（Hz）

void PlayTone(double frequency, int duration) {
    // 计算样本数
    int samples = SAMPLE_RATE * duration;
    short* buffer = (short*)malloc(samples * sizeof(short));

    // 生成正弦波
    for (int i = 0; i < samples; i++) {
        buffer[i] = (short)(32767 * sin(2 * M_PI * frequency * (i / (double)SAMPLE_RATE)));
    }

    // 设置WAVE格式
    WAVEFORMATEX wfx;
    wfx.wFormatTag = WAVE_FORMAT_PCM;
    wfx.nChannels = 1; // 单声道
    wfx.nSamplesPerSec = SAMPLE_RATE;
    wfx.wBitsPerSample = 16; // 16位深
    wfx.nBlockAlign = (wfx.nChannels * wfx.wBitsPerSample) / 8;
    wfx.nAvgBytesPerSec = SAMPLE_RATE * wfx.nBlockAlign;
    wfx.cbSize = 0;

    // 打开音频输出设备
    HWAVEOUT hWaveOut;
    if (waveOutOpen(&hWaveOut, WAVE_MAPPER, &wfx, 0, 0, CALLBACK_NULL) != MMSYSERR_NOERROR) {
        printf("无法打开音频输出设备\n");
        free(buffer);
        return;
    }

    // 创建WAVEHDR结构
    WAVEHDR waveHdr;
    waveHdr.lpData = (LPSTR)buffer;
    waveHdr.dwBufferLength = samples * sizeof(short);
    waveHdr.dwFlags = 0;
    waveHdr.dwLoops = 0;

    // 准备并写入音频数据
    waveOutPrepareHeader(hWaveOut, &waveHdr, sizeof(WAVEHDR));
    waveOutWrite(hWaveOut, &waveHdr, sizeof(WAVEHDR));

    // 等待音频播放完成
    while (!(waveHdr.dwFlags & WHDR_DONE)) {
        Sleep(10);
    }

    // 清理资源
    waveOutUnprepareHeader(hWaveOut, &waveHdr, sizeof(WAVEHDR));
    waveOutClose(hWaveOut);
    free(buffer);
}

int main() {
    PlayTone(FREQUENCY, DURATION); // 播放432Hz，持续1秒
    return 0;
}