---
name: "soundmodem"
section: "8"
platform: "linux"
package: "soundmodem"
version: "0.20-7"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/soundmodem"
---

# soundmodem(8)

Soundcard modem driver

## NAME

soundmodem - Soundcard modem driver

## SYNOPSIS

**soundmodem** **\[ configfile \]** **\[ -sSRM \]** **\[-v verbosity level\]** **\[-c configuration name\]**

## DESCRIPTION

**soundmodem** is a user mode driver for packet radio using a standard soundcard supported by OSS/Free. It integrates tightly with the kernel MKISS driver (enable CONFIG\_MKISS). **soundmodem** is controlled by a configuration file. The default filename is /etc/ax25/soundmodem.conf. Any other name may be specified on the command line.

## OPTIONS

**soundmodem** accepts the following options:

- **-h**

  **--help** Display an overview of the available command line parameters and exit.

- **-v level**

  Set the verbosity level. 0 only displays fatal errors.

- **-c configname**

  Use the named configuration. If absent the first is taken.

- **-s**

  Log messages to syslog instead of standard out.

- **-S**

  Disable the use of SIMD instructions (aka MMX, VIS, etc).

- **-R**

  Run with realtime scheduling (SCHED\_RR). Use with caution.

- **-M**

  Lock memory down in RAM; disables swapping soundmodem out.

## SEE ALSO

```
ifconfig (8), soundmodemconfig (8)
```

## AUTHOR

soundmodem was written by Thomas Sailer, HB9JNX/AE4WA (sailer@ife.ee.ethz.ch).