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RADIOCTL(1) NetBSD General Commands Manual RADIOCTL(1)
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by Kimmo Suominen.
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radioctl -- control radio tuners
radioctl [-f file] [-n] -a
radioctl [-f file] [-n] name
radioctl [-f file] [-n] -w name=value
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.
Attempt to set the specified variable name to value.
Specify an alternative radio tuner device.
-n Suppress printing of the variable name.
Values may be specified in either absolute or relative forms. The rela-
tive 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 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'.
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 `off'.
mono Forces card output to mono, `on' or `off'. Only for cards that
allow forced mono.
Reference frequency. Can be 25 kHz, 50 kHz and 100 kHz. Not all
cards allow to change the reference frequency.
Station locking sensitivity. Can be 5 mkV, 10 mkV, 30 mkV and 150
mkV. Not all cards allow to change the station locking sensitiv-
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 radioctl:
RADIODEVICE The radio tuner device to use.
/dev/radio radio tuner device
radioctl command first appeared in OpenBSD 3.0 and NetBSD 1.6.
NetBSD 7.0 September 16, 2001 NetBSD 7.0