minimodem ☆
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Description:
General-purpose software audio FSK modem
Type: Formula  |  Tracked Since: Dec 28, 2025
Links: Homepage  |  formulae.brew.sh
Category: System utilities
Tags: modem fsk audio data-transfer command-line
Install: brew install minimodem
About:
Minimodem is a command-line tool that generates and decodes audio Frequency-Shift Keying (FSK) signals. It allows users to transmit and receive data over standard audio interfaces, such as a sound card or audio jack, effectively turning any computer into a modem. This utility is valuable for simple data transfer, debugging, and interfacing with legacy hardware that uses audio-based communication protocols.
Key Features:
  • Real-time audio FSK encoding and decoding
  • Support for multiple standard and custom Bell/RTTY tones
  • Command-line interface for easy scripting and automation
  • No special hardware required, uses standard sound card
Use Cases:
  • Transmitting data between computers via an audio cable
  • Decoding signals from legacy hardware or radio transmissions
  • Generating tones for testing audio equipment or circuits
Alternatives:
  • multimon-ng – More focused on decoding multiple digital transmission modes, often used in security research, whereas minimodem is a general-purpose modem tool.
  • soundmodem – A Linux kernel driver for packet radio, providing a virtual network interface, while minimodem is a user-space utility for raw FSK.
Version History
Detected Version Rev Change Commit
Sep 15, 2025 10:45pm 0 VERSION_BUMP 1233b220
Sep 14, 2024 4:13am 0 VERSION_BUMP 65cf4fd8
Dec 2, 2022 1:40am 0 VERSION_BUMP f56bf971
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