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