amdrozdov/asl

Audio analysis tool

asl

Audio encoding and analysis tool

This project is currently my way to learn digital audio encodings. But it may be useful for quick tasks in speech recognition domain (for instance: quick slicing, channels split or PBX decoding).

Features list

• Basic audio data information
• Linear PCM wave decoder
• u-law decoder
• a-law decoder
• Audio slicing (from any format to LPCM wave)
• Channel splitting (from any format to LPCM wave)
• Advanced audio analysis (soon)

Usage example

asl info -f samples/sample.wav
asl split -f samples/sample.wav -p ch_split_
asl slice -f samples/sample.wav -s 1 8 55 -e 2 11 65 -o sl_one.wav sl_drums.wav sl_bass.wav

Build

# C++ 17 
mkdir -p build && cd build && cmake ../ && cmake --build .

Test build

pip install cpplint
make rebuild && make lint && make test

Important literature

• Wave PCM Format
• Recommended Practices for Enhancing Digital Audio Compatibility in Multimedia Systems
• Introduction to Digital Audio Coding and Standards