Autolooper

A simple tool to help you extend music!

Usage

Compile the code with
make ansi

Run the program using
./main /path/to/input.wav /path/to/output.wav MIN_DURATION [START_TIME END_TIME]

Notes:

• Input file should be an uncompressed WAV file (see Convert Audio to WAV for more info).
• MIN_DURATION, START_TIME and END_TIME are in seconds and should be integers.
• If START_TIME and END_TIME are not provided, the program will attempt to find the music loop on its own. For best results, it is recommended for the input file to have at least 2 loops of the music.

Example:
./main input.wav output.wav 300 1 73

Convert Audio to WAV

Generating uncompressed wav files using ffmpeg:

• stereo audio file
  ffmpeg -i INPUT_FILE -acodec pcm_s16le OUTPUT_FILE
• mono audio file
  ffmpeg -i INPUT_FILE -acodec pcm_s16le -ac 1 OUTPUT_FILE

Validate Parser Results

Commands to run the Python testing code:

1. Python environment setup
   python3.10 -m venv venv
2. Activate python env
   source venv/bin/activate
3. Install dependencies
   python -m pip install -r requirements.txt
4. Build shared object file for wav file parser to be used by python script
   gcc -shared -o parse_wav.so -fPIC parse_wav.c
5. Run testing script (it checks that parse_wav.c returns the same values as the librosa library)
   python py_testing/audio_test.py