class DSP::FrequencyDomain

• DSP::FrequencyDomain
• Reference
• Object

Overview

Frequency domain analysis class. On instantiation a forward FFT is performed on the given time series data, and the results are stored in full and half form. The half-FFT form cuts out the latter half of the FFT results. Also, for the half-FFT the complex values will be converted to magnitude (linear or decibel) if specified in :fft_format (see FFT_FORMATS for valid values).

Defined in:

dsp/analysis/frequency_domain.cr

Constructors

• .new(data : Array(Float64), sample_rate : Float64)

Instance Method Summary

• #freq_magnitudes
• #freq_magnitudes_db
• #freq_to_idx(freq)

  Convert an FFT frequency bin to the corresponding FFT output index

• #idx_to_freq(idx)

  Convert an FFT output index to the corresponding frequency bin

• #peaks

  Find frequency peak values.

• #peaks_db

  Find frequency peak values.

Constructor Detail

Instance Method Detail