This is Bluetooth SBC and aptX audio codecs online realtime encoder.
It is created to simulate Bluetooth A2DP audio quality right in your browser.
MP3, AAC, WAV and FLAC files should work fine.
The loaded file is encoded to SBC/aptX, decoded and played courtesy of BlueZ SBC library, libopenaptx and emscripten C to JS compiler. Load only 44100 Hz, Stereo, 16 bit audio files.
SBC uses the following configuration: 44100 Hz, 16 blocks, 8 subbands.