headphones/firmware/tools

filter_test

This is a basic utility for testing the Ploopy headphones filtering routines on a PC.

Usage

Find a source file and use ffmpeg to convert it to 16bit stereo PCM samples:

ffmpeg -i <input file> -map 0:6 -vn -f s16le -acodec pcm_s16le input.pcm

Run filter_test to process the PCM samples. The filter_test program takes two arguments an input file and an output file:

./filter_test input.pcm output.pcm

You can listen to the PCM files using ffplay (which is usually included with ffmpeg):

./ffplay -f s16le -ar 48000 -ac 2 output.pcm

If there are no obvious problems, go ahead and flash your firmware.