spectrum

Documentation

Index

• Constants
• func PCMFromWav(wavReader io.ReadSeeker) ([]int, int, error)
• type FrequenciesAnalysis
  • func FrequenciesSpectrumAnalysis(samples []int, sampleRate int) (FrequenciesAnalysis, error)
• type FrequencyPower

Constants

const FrequencyUpperBound = 47000

FrequencyUpperBound is the maximum frequency analyzed. All frequencies beyond this will be discarded

Functions

func PCMFromWav

func PCMFromWav(wavReader io.ReadSeeker) ([]int, int, error)

PCMFromWav reads the PCM as Buffer and the sample rate

Types

type FrequenciesAnalysis

type FrequenciesAnalysis struct {
	Spectrum []float64
	MaxFreq  int
	MinFreq  int
	MaxPower FrequencyPower
}

FrequenciesAnalysis modes an analysis of frequencies for an audio file

func FrequenciesSpectrumAnalysis

func FrequenciesSpectrumAnalysis(samples []int, sampleRate int) (FrequenciesAnalysis, error)

FrequenciesSpectrumAnalysis calculates the frequencies spectrum from a PCM sample buffer

type FrequencyPower

type FrequencyPower struct {
	Freq  int
	Value float64
}

FrequencyPower is the representation of a frequency power