音频变调

复制import subprocess
import os

# 使用 FFmpeg 实现不变速变调（提高 4 个半音）
input_file = "input.wav"
output_file = "output_pitch.wav"
semitones = 4  # 半音数，正数升调，负数降调

# 通过 atempo 保持原速，rubberband 变调
cmd = [
    "ffmpeg",
    "-i", input_file,
    "-af", f"rubberband=pitch={2**(semitones/12):.6f}:tempo=1",
    output_file
]

result = subprocess.run(cmd, capture_output=True, text=True)
if result.returncode != 0:
    print(f"FFmpeg error: {result.stderr}")
else:
    print(f"Pitch shifted by {semitones} semitones -> {output_file}")

复制package main

import (
	"fmt"
	"os/exec"
	"strconv"
)

func main() {
	input := "input.wav"
	output := "output_pitch.wav"
	semitones := 4.0

	// 计算变调系数：2^(semitones/12)
	ratio := 1.0
	if semitones >= 0 {
		ratio = 1.0
		for i := 0; i < int(semitones); i++ {
			ratio *= 1.0594630943592953 // 2^(1/12)
		}
	} else {
		ratio = 1.0
		for i := 0; i < int(-semitones); i++ {
			ratio /= 1.0594630943592953
		}
	}

	cmd := exec.Command("ffmpeg",
		"-i", input,
		"-af", fmt.Sprintf("rubberband=pitch=%.6f:tempo=1", ratio),
		output,
	)

	out, err := cmd.CombinedOutput()
	if err != nil {
		fmt.Printf("FFmpeg error: %v\n%s", err, string(out))
		return
	}
	fmt.Printf("Pitch shifted by " + strconv.FormatFloat(semitones, 'f', 0, 64) + " semitones -> " + output)
}

复制const { execSync } = require('child_process');
const path = require('path');

// 使用 FFmpeg 在 Node.js 中实现不变速变调
const inputFile = 'input.wav';
const outputFile = 'output_pitch.wav';
const semitones = 4; // 升 4 个半音

// 计算变调系数
const ratio = Math.pow(2, semitones / 12);

const cmd = `ffmpeg -i "${inputFile}" -af "rubberband=pitch=${ratio.toFixed(6)}:tempo=1" "${outputFile}"`;

try {
    execSync(cmd, { stdio: 'pipe' });
    console.log(`Pitch shifted by ${semitones} semitones -> ${outputFile}`);
} catch (err) {
    console.error(`FFmpeg error: ${err.stderr.toString()}`);
}