wav

Simple package for work with wav

WAV file structure

Offset(byte)	Size(byte)	Name	Description
0	4	chunkId	Contains "RIFF" characters in ASCII encoding. It is the beginning of the RIFF chain.
4	4	chunkSize	This is the remaining chain size from that position. In other words, this is the file size minus 8, that is, the chunkId and chunkSize fields are excluded.
8	4	format	Contains "WAVE" symbols
12	4	subchunk1Id	Contains the characters "fmt "
16	4	subchunk1Size	16 for PCM format. This is the remaining size of the chain from this position.
20	2	audioFormat	Audio format, list of acceptable formats. For PCM = 1 (that is, Linear Quantization). Values other than 1 indicate some compression format.
22	2	numChannels	Number of channels. Mono = 1, Stereo = 2, etc.
24	4	sampleRate	Sampling frequency. 8000 Hz, 44100 Hz, etc.
28	4	byteRate	The number of bytes transferred per second of playback.
32	2	blockAlign	The number of bytes for one sample, including all channels.
34	2	bitsPerSample	The number of bits in the sample. The so-called "depth" or accuracy of sound. 8 bits, 16 bits, etc.
36	4	subchunk2Id	Contains symbols "data"
40	4	subchunk2Size	The number of bytes in the data area.
44	...	data	WAV audio data.

Example

import "github.com/geoirb/wav"

Read .wav file

    data, _ := ioutil.ReadFile("path-file.wav")
    wav.NewReader(data)

Create .wav file

	file, _ := os.Create("path-file.wav")
	w := wav.NewWriter(file, 2, 44100, wav.S16LE)
	var data []byte
	for {
		// read audio data
		// ...
		w.Write(data)
		// ...
	}
	w.Close()