Audio visualizer in Go

demo_audio_visualizer

Simple audio visualizer in Go

Used libraries:

To disable the additional console window on Windows OS compile using:

go build -ldflags "-H=windowsgui -w -s"
Owner
Miretz
Miretz
https://github.com/Miretz/demo_audio_visualizer
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Comments
  • Audio parsing does not work

    Audio parsing does not work

    Thanks for building this! Overall great work, but I found an error:

    This line does not correctly parse the audio as 16bit little-endian

    for i := 0; i < numSamples; i++ {
    audioWave[i], _ = strconv.ParseFloat(string(buffer[i]), bitSize)
}

    Here is how the parsing can work:

    for byteNum, sampleNum := 0, 0; byteNum < len(buffer); byteNum += 4 {
	//convert from int8 little-endian to int16, values in [-32768 to 32767]
	left := (int16(buffer[byteNum+1]) << 8) | (int16(buffer[byteNum]))
	right := (int16(buffer[byteNum+3]) << 8) | (int16(buffer[byteNum+2]))
	//Scale -1 to 1
	valL := (float64(left) + .5) / 32767.5
	valR := (float64(right) + .5) / 32767.5

	//Combine channels
	audioWave[sampleNum] = (valL + valR) / 2
	sampleNum++
}

    If you grant me access I have a branch I can make a PR for

Related tags
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