ast

Notice

This project is in progress for developing, If you like this project's purpose Please star it to express your passionated rejoicing! 😄

What is AST?

Ast is an advanced sound tool, This tool is made for conversion the audio rate, bit depth and format.

The tool supports both command line and library methods, These day Golang audio eco system is too undeveloped, This is why the project is in progress for developing.

Okay, So what is features which this library is supported?

Conversion

Format change

audio := NewAudio("./my_audio.wav")
newAudio := audio.To(codec.Mp3)

// save to your local disk
newAudio.Save("./my_new_audio.mp3")

// get the raw bytes
data := newAudio.Bytes()

Sampling

audio := NewAudio("./my_audio.wav")
newAudio := audio.To(codec.Mp3).Convert(&codec.Format{
	SampleRate: 8000,
	BitDepth: 16,
	Channel: codec.MonoChannel,
})

// save to your local disk
newAudio.Save("./my_new_audio.mp3")

// get the raw bytes
data := newAudio.Bytes()

audio := NewAudio("./my_audio.raw").WithType(&codec.Format{
	Encode: codec.Linear16Encode,
	SampleRate: 8000,
	BitDepth: 16,
	Channel: codec.MonoChannel,
})
newAudio := audio.To(codec.Mp3).Convert(&codec.Format{
    SapleRate: 16000,
    BitDepth: 16,
    Channel: codec.MonoChannel,
})

// save to your local disk
newAudio.Save("./my_new_audio.mp3")

// get the raw bytes
data := newAudio.Bytes()

Analyze

audio := NewAudio("./my_audio.wav")
log.Println(audio.Analyze())

OUTPUT

FileType: Wav
IsValid: true
ChunkSize: 8192
Chnanel: Mono(1)
SampleRate: 8000
BitDepth: 8
NumSamples: 1824

There are quick and fast feature to get attribute for each format

pcm := audio.GetPCM()
spectrum := audio.Spectrum()
spectrum.Save("./my_spectrum.png")

Audio Toolkit

Manipulate audio data with a simple method

audio := NewAudio("./my_audio.wav")

audio.Speed(1.2) // 120% faster
audio.Pitch(1.15) // Up to 1.15 high pitch
audio.Alpha(0.9) // Low as 90% tone

audio.LowPassFilter()
audio.Save("./my_new_audio.wav")

Merge two audio

audio := NewAudio("./my_audio.wav")
backgroundAudio := NewAudio("./my_background.mp3")

audio.Merge(backgroundAudio)
audio.Save("./my_new_audio.wav")

Concatenate two audios

audio := NewAudio("./my_audio.wav")
backgroundAudio := NewAudio("./my_background.mp3")

audio.Concat(backgroundAudio)
audio.Save("./my_new_audio.wav")

Road map

Audio Format

• PCM

  • Linear16
  • G711 A Type
  • G711 U Type

• Wav

• Mpeg

  • Mp3
  • Mp4

• Speex

• Flac

Features

Sampling

• UpSample / DownSample
• BitDepth Conversion
• Channel Conversion
• Interpolation (Cubic, Linear)
• Filter

Format Conversion

Audio Controlling

• Pitch control
• Alpha control
• Speed control
• Cutting audio
• Merge audio
• Concat audio