NAME
smmixer - get/set Linux soundcard packet radio modem driver mixer
SYNOPSIS
smmixer [-i device] [ params ]
DESCRIPTION
smmixer displays and/or sets the input source and input and output
levels of a soundcard modem port.
OPTIONS
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].
PARAMETERS
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.
CONSIDERATIONS
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.
SEE ALSO
smdiag (8), sethdlc (8), linux/drivers/net/soundmodem.c
AUTHOR
smmixer was written by Thomas Sailer (sailer@ife.ee.ethz.ch).