src Directory Reference

Files
	biquad.c
	Biquad (second-order IIR) filter implementation.
	fileio.c
	Audio file I/O and feature vector writing.
	liveio.c
	Live audio recording and playback implementation.
	minidsp_core.c
	Stateless signal math: dot product, energy, power, entropy, scaling, AGC, time-domain pitch estimation, simple effects, and window function generation.
	minidsp_dtmf.c
	DTMF tone detection and generation.
	minidsp_error.c
	Configurable error handler for precondition violations.
	minidsp_fir.c
	FIR filtering and convolution: direct time-domain methods and FFT overlap-add fast convolution.
	minidsp_gcc.c
	GCC-PHAT delay estimation: cross-correlation, delay search, and multi-signal delay estimation.
	minidsp_generators.c
	Signal generators: sine, white noise, impulse, chirps, square, sawtooth waves, and Shepard tone.
	minidsp_internal.h
	Internal header for cross-file dependencies within the minidsp module.
	minidsp_resample.c
	Polyphase sinc resampler for offline sample rate conversion.
	minidsp_spectext.c
	Spectrogram text art: synthesise audio that displays readable text when viewed as a spectrogram.
	minidsp_spectrum.c
	FFT-based spectrum analysis: magnitude spectrum, PSD, phase spectrum, STFT, mel filterbanks, MFCCs, FFT-based F0 estimation, and MD_shutdown().
	minidsp_steg.c
	Audio steganography: hide secret messages inside audio signals.
	minidsp_vad.c
	Voice Activity Detection (VAD) with adaptive feature normalization.