Module analysis

Expand description

FFT-based frequency analysis for recorded signals

This module provides functions to analyze recorded audio signals and extract:

Structs§

AnalysisResult: Result of FFT analysis
MicrophoneCompensation: Microphone compensation data (frequency response correction)
WavAnalysisConfig: Configuration for standalone WAV buffer analysis
WavAnalysisOutput: Result of standalone WAV buffer analysis

analyze_recording: Analyze a recorded WAV file against a reference signal
analyze_wav_buffer: Analyze a buffer of audio samples and return frequency response
analyze_wav_file: Analyze a WAV file and return frequency response
compute_clarity_broadband: Compute Clarity (C50, C80) from Impulse Response (Broadband) Returns (C50_dB, C80_dB)
compute_clarity_spectrum: Compute Clarity spectrum (C50, C80) using octave band filtering Returns (C50_vec, C80_vec)
compute_group_delay: Compute group delay from phase data Group delay = -d(phase)/d(frequency) / (2*pi)
compute_impulse_response_from_fr: Compute impulse response from frequency response using approximated inverse FFT
compute_rt60_broadband: Compute RT60 from Impulse Response (Broadband) Uses T20 (-5dB to -25dB) extrapolation
compute_rt60_spectrum: Compute RT60 spectrum using octave band filtering
compute_spectrogram: Compute Spectrogram from Impulse Response Returns (spectrogram_matrix_db, frequency_bins, time_bins) window_size samples (e.g. 512), hop_size samples (e.g. 128).
read_analysis_csv: Read analysis results from CSV file
smooth_response_f32: Apply octave smoothing to frequency response data (f32 version)
smooth_response_f64: Apply octave smoothing to frequency response data (f64 version)
write_analysis_csv: Write analysis results to CSV file with optional microphone compensation
write_wav_analysis_csv: Write WAV analysis result to CSV file