audio

Documentation

Index

• func CalculateInterval(rate int, targetFrameSize int) int
• func LowPassFilter(samples []float32, cutoff float64, rate int) []float32
• func ProgressivelyReadFloatArray(in chan float32, out chan float32)
• func ReadFloatArray(samples []float32) []float32
• type AudioMetadata
  • func GetMetadata(filePath string) (*AudioMetadata, error)

Functions

func CalculateInterval

func CalculateInterval(rate int, targetFrameSize int) int

CalculateInterval dynamically calculates INTERVAL based on the sample rate.

func LowPassFilter

func LowPassFilter(samples []float32, cutoff float64, rate int) []float32

LowPassFilter applies a simple low-pass filter to remove noise from samples.

func ProgressivelyReadFloatArray

func ProgressivelyReadFloatArray(in chan float32, out chan float32)

ProgressivelyReadFloatArray processes PCM data into energy levels for BPM analysis.

func ReadFloatArray

func ReadFloatArray(samples []float32) []float32

ReadFloatArray processes PCM samples into an energy array.

Types

type AudioMetadata

type AudioMetadata struct {
	Rate     int // Sample rate in Hz
	Channels int // Number of audio channels
}

AudioMetadata contains audio properties extracted from a file.

func GetMetadata

func GetMetadata(filePath string) (*AudioMetadata, error)

GetMetadata extracts metadata (sample rate, channels) based on file type using the megasound package.