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 (
[email protected]).