wavcomp 0.1.0

Compress data into WAV files

WavComp — Compress data into WAV files.

WavComp is a Python library that takes arbitrary data (text or binary) and stores it inside a standard WAV audio file. The output sounds like white noise and can be used for compression or covert transfer.

Features

• Compress text or binary data into a WAV file
• Optional zlib/bz2/lzma compression presets
• Optional password encryption
• Split large files into numbered WAV volumes (cover.001.wav, cover.002.wav, ...)
• Recover data exactly via encode / decode interface

Installation

pip install wavcomp

Quick Start

from wavcomp import WavComp

wc = WavComp()

# Compress data into a WAV byte stream
with open("plain.txt", "rb") as f:
    data = f.read()
wav_bytes = wc.encode(data)

with open("cover.wav", "wb") as f:
    f.write(wav_bytes)

# Recover the original data
with open("cover.wav", "rb") as f:
    recovered = wc.decode(f.read())

assert recovered == data

Command Line

# Single WAV output
wavcomp encode secret.txt cover.wav -p mypass
wavcomp decode cover.wav recovered.txt -p mypass

# Split into multiple WAV volumes, 1 MB each
wavcomp encode large.bin cover -k 1M -p mypass
wavcomp decode cover recovered.bin -p mypass

Chunk size suffixes: K, M, G (e.g. -k 10K, -k 5M, -k 1G).

Compression Presets

WavComp(compression="fast")   # zlib level 1, fastest
WavComp(compression="normal") # zlib level 6
WavComp(compression="best")   # zlib level 9, default
WavComp(compression="ultra")  # lzma, best ratio but slower
WavComp(compression=5)        # custom zlib level 0-9

Split Output

When -k is used on the command line, each chunk is written to its own WAV file. This is useful for splitting large payloads into smaller files.

wavcomp encode large.bin cover -k 1M
# creates cover.001.wav, cover.002.wav, ...

Python API:

wc = WavComp(chunk_size=1024 * 1024)
paths = wc.encode_split(data, "cover")
recovered = wc.decode_files(paths)

Notes

• Designed for file-to-file transfer. The output WAV sounds like noise.
• Encryption uses a fixed salt, suitable for general use only.
• Modulation parameters must match between encode and decode.

License

MIT