toot

README

Some audio processing things. Built to be compatable with faiface's beep library.

Has the following:

• microphone support using portaudio
• analyzer for doing (very basic) frequency analysis
• visualizer for making pretty things out of the analyzer

Documentation

Index

• func NewAnalyzer(stream beep.Streamer, sampleRate int, bufferSize int) *analyzer
• type InputDevice
  • func GetInputDevices() ([]InputDevice, error)
• type Microphone
  • func NewDefaultMicrophone() (Microphone, error)
  • func NewMicrophone(name string) (Microphone, error)
• type Spectra
  • func (s Spectra) Frequencies() []float64
  • func (s Spectra) Values() []float64
• type SpectrumSample
• type Visualizer
  • func NewVisualizer(lowerBound, upperBound float64, bins int) Visualizer

Functions

func NewAnalyzer

func NewAnalyzer(stream beep.Streamer, sampleRate int, bufferSize int) *analyzer

Types

type InputDevice

type InputDevice struct {
	Name   string
	Stereo bool
}

func GetInputDevices

func GetInputDevices() ([]InputDevice, error)

type Microphone

type Microphone interface {
	beep.Streamer
	Start(ctx context.Context) error
	Close() error
	Format() beep.Format
	DeviceInfo() portaudio.DeviceInfo
	SetSampleRate(rate beep.SampleRate)
}

func NewDefaultMicrophone

func NewDefaultMicrophone() (Microphone, error)

func NewMicrophone

func NewMicrophone(name string) (Microphone, error)

type Spectra

type Spectra []SpectrumSample

func (Spectra) Frequencies

func (s Spectra) Frequencies() []float64

func (Spectra) Values

func (s Spectra) Values() []float64

type SpectrumSample

type SpectrumSample struct {
	Frequency float64
	Value     float64
}

type Visualizer

type Visualizer interface {
	Bin(s Spectra) []float64
}

Allows us to visualize audio power specra in bins.

func NewVisualizer

func NewVisualizer(lowerBound, upperBound float64, bins int) Visualizer