filter

package

v0.1.0 Latest Latest Go to latest Published: Jan 24, 2025 License: MIT Imports: 7 Imported by: 0

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Valid go.mod file
Redistributable license
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Stable version
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Repository

github.com/BeatGlow/audio

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Documentation ¶

Index ¶

Variables
func HighPass(dst, src []float64, cutOffFrequency float64, sampleRate int) []float64
func LowPass(dst, src []float64, cutOffFrequency float64, sampleRate int) []float64
func NewDelay[T audio.Sample](r audio.Reader[T], channels, sampleRate int, delay time.Duration) (audio.Reader[T], error)
type Delay
- func (d *Delay[T]) ReadSamples(buffer audio.Samples[T]) (int, error)
- func (d *Delay[T]) String() string

Constants ¶

This section is empty.

Variables ¶

View Source

var (
	ErrChannels      = errors.New("filter: need more than 0 channels")
	ErrDelayNegative = errors.New("filter: delay can't be negative")
)

Functions ¶

func HighPass ¶

func HighPass(dst, src []float64, cutOffFrequency float64, sampleRate int) []float64

HighPass is a basic LowPass filter cutting off the audio buffer frequencies below the cutOff frequency.

func LowPass ¶

func LowPass(dst, src []float64, cutOffFrequency float64, sampleRate int) []float64

LowPass is a basic LowPass filter cutting off CutOffFreq is where the filter would be at -3db. TODO: param to say how efficient we want the low pass to be. matlab: lpFilt = designfilt('lowpassfir','PassbandFrequency',0.25, ...

'StopbandFrequency',0.35,'PassbandRipple',0.5, ...
'StopbandAttenuation',65,'DesignMethod','kaiserwin');

func NewDelay ¶ added in v0.1.0

func NewDelay[T audio.Sample](r audio.Reader[T], channels, sampleRate int, delay time.Duration) (audio.Reader[T], error)

NewDelay introduces a fixed delay for reading samples from r.

Types ¶

type Delay ¶ added in v0.1.0

type Delay[T audio.Sample] struct {
	audio.Reader[T]
	audio.Samples[T]
	time.Duration
}

Delay is a general purpose delay line.

func (*Delay[T]) ReadSamples ¶ added in v0.1.0

func (d *Delay[T]) ReadSamples(buffer audio.Samples[T]) (int, error)

func (*Delay[T]) String ¶ added in v0.1.0

func (d *Delay[T]) String() string

Source Files ¶

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