smmixer - get/set Linux soundcard packet radio modem driver
mixer
smmixer [-i device] [ params ]
smmixer displays and/or sets the input source and input and
output levels of a soundcard modem port.
smmixer accepts the following option:
- -i
- The device argument specifies the soundcard modem device which
should be configured or interrogated. It will usually have the following
form: sm[0-3].
The AD1848 (WSS) mixer accepts the following
parameters:
- ol=val
- sets the level of the left output to the specified value. Legal values are
from -100..0dB.
- or=val
- sets the level of the right output to the specified value. Legal values
are from -100..0dB.
- o=val
- sets the level of both outputs to the specified value. Legal values are
from -100..0dB.
- il=val
- sets the level of the left input to the specified value. Legal values are
from 0..43dB.
- ir=val
- sets the level of the right input to the specified value. Legal values are
from 0..43dB.
- i=val
- sets the level of both inputs to the specified value. Legal values are
from 0..43dB.
- sl=val
- sets the source of the left input to the specified value. Legal values are
line, aux1, mic or dac.
- sr=val
- sets the source of the right input to the specified value. Legal values
are line, aux1, mic or dac.
- s=val
- sets the source of both inputs to the specified value. Legal values are
line, aux1, mic or dac.
The CT1335 (SB2.x) mixer accepts the following parameter:
- o=val
- sets the output level to the specified value. Legal values are from
-46..0dB.
The CT1345 (SBPro) mixer accepts the following parameters:
- ol=val
- sets the level of the left output to the specified value. Legal values are
from -46..0dB.
- or=val
- sets the level of the right output to the specified value. Legal values
are from -46..0dB.
- o=val
- sets the level of both outputs to the specified value. Legal values are
from -46..0dB.
- s=val
- sets the input source to the specified value. Legal values are mic,
cd or line.
The CT1745 (SB16, SB32 AWE) mixer accepts the following
parameters:
- ol=val
- sets the level of the left output to the specified value. Legal values are
from -62..18dB.
- or=val
- sets the level of the right output to the specified value. Legal values
are from -62..18dB.
- o=val
- sets the level of both outputs to the specified value. Legal values are
from -62..18dB.
- il=val
- sets the level of the left input to the specified value. Legal values are
from -62..18dB.
- ir=val
- sets the level of the right input to the specified value. Legal values are
from -62..18dB.
- i=val
- sets the level of both inputs to the specified value. Legal values are
from -62..18dB.
- s=val
- enables the specified value as a source. Legal values are line, line.l,
line.r, midi, midi.l, midi.r, cd, cd.l, cd.r or mic.
It is important that the audio levels of your radio match those of
the soundcard. To help achieve this, use the smdiag utility.
This utility can only be used after the interface is started up,
i.e. after ifconfig sm? up.
The sound driver and the soundcard modem driver are mutually
exclusive, i.e. they cannot both access the same soundcard at the same time.
Even worse, the sound driver reserves the soundcard as soon as it gets
loaded. The souncard modem driver however reserves the card only when the
interface is started, i.e. during ifconfig if up.
9600 baud may not currently work on SoundBlaster cards with DSP
revision 4.x, i.e. SB16 and SB32 AWE. This is because they seem to not be
fully backwards compatible.
smdiag (8), sethdlc (8),
linux/drivers/net/soundmodem.c
smmixer was written by Thomas Sailer
(t.sailer@alumni.ethz.ch).