RADIOCTL(1) | General Commands Manual | RADIOCTL(1)

# NAME

`radioctl` — control radio tuners

# SYNOPSIS

`radioctl` | [`-anv`] [`-f` file]

`radioctl` | [`-nv`] [`-f` file] name

`radioctl` | [`-n`] [`-f` file] name=value

# DESCRIPTION

The `radioctl` command displays or sets various variables that affect the radio tuner behavior. If a variable is present on the command line, `radioctl` prints the current value of this variable for the specified device. By default, `radioctl` operates on the /dev/radio device.

The options are as follows:

`-a`
  Print all device variables and their current values. This is the default, if no parameters are given to `radioctl`.
`-f` file
  Specify an alternative radio tuner device.
`-n`
  Suppress printing of the variable name.
`-v`
  Show the possible values of queries.
name=value
  Attempt to set the specified variable name to value.

Values may be specified in either absolute or relative forms. The relative form is indicated by a prefix of ‘`+`’ or ‘`-`’ to denote an increase or decrease, respectively.

The exact set of controls that can be manipulated depends on the tuner. The general format (in both getting and setting a value) is:

name=value

The name indicates what part of the tuner the control affects.

Write only controls:

search
  Only for cards that allow hardware search. Can be ‘`up`’ or ‘`down`’.

Read-write controls:

channel
  Specifies the TV channel. Integer value from 0 to 150. Using the channel control puts the tuner in “TV” mode.
chnlset
  Specifies the TV channel set. The tuner uses the current channel set to derive a frequency from the channel. The following is a list of valid channel sets:

  nabcst
    U.S.A. Broadcast
  cableirc
    U.S.A. Cable IRC
  cablehrc
    U.S.A. Cable HRC
  weurope
    Western Europe
  jpnbcst
    Japan Broadcast
  jpncable
    Japan Cable
  xussr
    Former U.S.S.R. and C.I.S. countries
  australia
    Australia
  france
    France
frequency
  Specifies the FM frequency in MHz. Float value from 87.5 to 108.0. Using the frequency control puts the tuner in “radio” mode.
volume
  Integer value from 0 to 255.
mute
  Mutes the card (volume is not affected), ‘`on`’ or ‘`off`’.
mono
  Forces card output to mono, ‘`on`’ or ‘`off`’. Only for cards that allow forced mono.
reference
  Reference frequency. Can be 25 kHz, 50 kHz and 100 kHz. Not all cards allow the reference frequency to be changed.
sensitivity
  Station locking sensitivity. Can be 5 mkV, 10 mkV, 30 mkV and 150 mkV. Not all cards allow the station locking sensitivity to be changed.

All the remaining controls (mode, signal, stereo and card capabilities) are read-only and can be viewed using option `-a`.

# ENVIRONMENT

The following environment variable affects the execution of `radioctl`:

`RADIODEVICE`
  The radio tuner device to use.

# FILES

/dev/radio
  radio tuner device

# EXAMPLES

Print all device variables, along with their current values:

    $ radioctl -a
    volume=255
    channel=0
    chnlset=weurope
    frequency=106.30MHz
    mute=off
    reference=50kHz
    signal=on
    stereo=on
    mode: radio
    card capabilities:
            manageable mono/stereo

# SEE ALSO

radio(4)

# HISTORY

`radioctl` command first appeared in OpenBSD 3.0.

September 12, 2015 | Debian