Android app that shows a spectrogram
Disclaimer:
The code for this project is just an experiment doesn't follow best practices.
- Low latency audio processing, uses
- Multithreaded native code
- OpenSL
- Spectrum types:
- FFT, for scientific purposes
- Up to 8192 frequency bins
- Log/Linear scales
- Goertzel bank filter, centered at notes frequencies, for tuning instruments
- FFT, for scientific purposes
- Configurable FFT overlap
- Vertical bars smoothing
- Pan & Zoom
- Measuring cursor
This is me singing from the lowest note I can perform to the highest. I did this just for the screenshot, and it turns out I have the range of a baritono!
And the final Q/A test, displaying Lena(https://www.youtube.com/watch?v=S64FROErFYA), or half of it as YouTube downsampled the sound to 22Khz.
