Skip to content

Noise Sensor ImplementationLink

Work in progress

FirmwareLink

Audio I2S LibraryLink

Audio I2S Base library, intented to be generic purpose audio analysis library for an I2S Microphone on the SAMD21 with:

  • FFT Analysis
  • FIR Analysis
  • Custom window selection
  • Custom weighting function selection
  • Custom buffer size and custom fft bin size (in case of FFT analyser)
  • Custom equalisation
  • Octave auto generation of .h files for coefficients and so on

Smart Citizen Audio LibraryLink

Smart Citizen Audio Library intented for firmware implementation in the SmartCitizen kit 2.0, with a better usage of memory and SCK related functionalities:

  • FFT analysis
  • Selection of A or C weighting through LUT
  • Two user cases:
    • General audio analysis (sensorRead) with fixed buffer size and fixed FFT bins size (fs = 44,1kHz)
    • Audio Communication with FSK - with information transfer via audio

Source filesLink

Download

Check the source code