radioctl - control radio tuners
radioctl [-f file] [-n] -a
radioctl [-f file] [-n] name
radioctl [-f file] [-n] name=value
The radioctl command displays or sets various variables that
radio tuner behavior. If a variable is present on the command line,
radioctl prints the current value of this variable for the
By default, radioctl operates on the /dev/radio device.
The options are as follows:
-a Print all device variables and their current values.
Specify an alternative radio tuner device.
-n Suppress printing of the variable name.
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
The exact set of controls that can be manipulated depends on
The general format (in both getting and setting a value) is
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'.
Float value from 87.5 to 108.0.
volume Integer value from 0 to 255.
mute Mutes the card (volume is not affected), `on' or
mono Forces card output to mono, `on' or `off'. Only for
allow forced mono.
Reference frequency. Can be 25 kHz, 50 kHz and 100
kHz. Not all
cards allow the reference frequency to be changed.
Station locking sensitivity. Can be 5 mkV, 10 mkV,
30 mkV and 150
mkV. Not all cards allow the station locking sensitivity to be
All the remaining controls (signal, stereo and card capabilities) are
read-only and can be viewed using option -a.
The following environment variable affects the execution of
RADIODEVICE The radio tuner device to use.
/dev/radio radio tuner device
$ radioctl -a
radioctl command first appeared in OpenBSD 3.0.
OpenBSD 3.6 September 16, 2001
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