audioutil

Audio processing utilities for WAV and MP3 files, providing decode, encode, volume, trim, mix, resample, and effects.

Features

• WAV read/write: 8/16/24/32-bit PCM, mono/stereo
• MP3 decode (via go-mp3); encoding not supported
• Volume: gain, fade in/out, normalize
• Trim: silence removal, range cut
• Mix: merge multiple audio streams
• Resample: linear interpolation
• Convert: mono/stereo, bit depth, WAV/MP3 round-trip
• Effects: fade, speed change, reverse

Key types

• Audio -- in-memory audio buffer (SampleRate, Channels, Format, Samples)
• SampleFormat -- bit depth constant (Format8Bit, Format16Bit, Format24Bit, Format32Bit)
• Info -- audio file metadata

Key functions

• Load(path) / LoadWAV(path) / LoadMP3(path) -- decode audio files
• SaveWAV(audio, path) / Save(audio, path) -- encode to WAV
• AdjustVolume, TrimSilence, Normalize, Mix, Resample, FadeIn, FadeOut
• ToMono, ToStereo, ChangeBitDepth
• Reverse, ChangeSpeed

Quick start

import "github.com/LingByte/ling-base/common/audioutil"

// Load WAV or MP3 (auto-detected by extension)
audio, err := audioutil.Load("input.mp3")
if err != nil {
    log.Fatal(err)
}
audio = audioutil.AdjustVolume(audio, 2.0)
audio = audioutil.TrimSilence(audio, -40)
_ = audioutil.SaveWAV(audio, "output.wav")

License

MIT