multimon-ng¶
Decoder for POCSAG, FLEX, AFSK, DTMF and other audio-band digital modes
- Version recorded: 1.3.1
- Categories:
pagers-decoders - Upstream: https://github.com/EliasOenal/multimon-ng
What it does¶
Takes demodulated audio and decodes a range of classic digital modes: POCSAG and FLEX paging, AFSK at several rates, DTMF, ZVEI and others.
Why you would want it¶
It is how audio from a receiver becomes text, and it is the standard back end for APRS and paging work. Piped from rtl_fm it turns a cheap dongle into a working decoder with no GUI at all.
Before it will work¶
An audio source — typically piped from rtl_fm or a sound card fed by a receiver. It expects raw samples at a specific rate, which is the usual first mistake.
How it installs¶
- apt:
multimon-ng
Known problems¶
It decodes whatever it is given and reports nothing when the input is wrong, so silence usually means a sample-rate or format mismatch rather than an absent signal.
Keeping it current¶
- probe: apt policy
- strategy: apt_upgrade