Sound analyser & recorder

Analyser module taken from Maximilian

Analyser:

Amplitude
RMS
Onset detection
FFT:
- FFT spectral centroid (current, min, max, average)
- FFT spectral flatness (current, min, max, average)
- FFT spectral magnitudes (max, db)
Octave harmonics

Recorder:

Record sound into RAM
Playback
Looping

Note: iOS App not tested yet