Crate audio_processor_analysis

Provides implementations of some audio analysis processors.

• Peak detector - peak_detector
• FFT (Windowed/Overlapped) - fft_processor
• Transient detection (not real-time) - transient_detection::stft
• Window functions - window_functions

RMS

Real-time safe, per-sample (ticked by UI thread) RMS calculation.

Peak detector

Peak detector with adjustable attack/release times.

FFT

rustfft audio-processor, forwards or backwards, real-time safe, FFT.

Applies a Hann window by default. Several window functions are exported by window_functions.

Then performs FFT with N bins.

Overlap is configurable

Envelope follower

Envelope follower implementation with adjustable attack/release times.

Transient detection

Implements “A Transient Detection Algorithm for Audio Using Iterative Analysis of STFT.”.

Does polyphonic transient detection, able to output signal or markers

Window functions

Several window functions are implemented and configurable.

Modules

• envelope_follower_processor
  Envelope follower implementation
• fft_processor
  FFT processor implementation with windowing & overlap, wraps rustfft.
• peak_detector
  Peak detector implementation
• running_rms_processor
  RMS implementation suitable for GUI reacting to magnitude of the signal. Accumulates values on a circular buffer, the consumer calculates the RMS value based on it.
• transient_detection
  Polyphonic transient detection implementation
• window_functions
  Many window functions