MPU(4) BSD Kernel Interfaces Manual MPU(4)NAME
mpu -- Roland MPU401 (and compatible) MIDI UART driver
SYNOPSIS
mpu* at acpi?
mpu* at eso?
mpu* at fms?
mpu* at isa? port 0x330 irq 9
mpu* at sb?
mpu* at ym?
mpu* at yds?
midi* at mpu?
DESCRIPTION
The mpu driver provides support for the Roland MPU401 (and compatible) MIDI UART cards.
Access to the device is through the MIDI driver.
SEE ALSO eso(4), fms(4), isa(4), midi(4), sb(4), yds(4), ym(4)HISTORY
The mpu device driver appeared in NetBSD 1.5.
BSD December 2, 2004 BSD
Check Out this Related Man Page
CMPCI(4) BSD Kernel Interfaces Manual CMPCI(4)NAME
cmpci -- C-Media CMI8x38 audio device driver
SYNOPSIS
cmpci* at pci? dev ? function ?
audio* at audiobus?
mpu* at cmpci?
opl* at cmpci? flags 1
DESCRIPTION
The cmpci device driver supports C-Media CMI8x38 based sound cards.
The device has SPDIF input/output interfaces, 16bit CODEC with analog mixer, OPL3 FM Synthesizer, and MPU401 compatible MIDI I/O port inter-
face.
MIXER DEVICE
The mixer device of cmpci driver can be accessed via mixerctl(1) command. The complex structure is analyzed as follows.
SPDIF in ----------------------
#1(coax)->|spdin1 | R -----------------------
#2(opt)-->|spdin2 spdif.input |--*->--|spdin spdif.output |--> SPDIF
-->|spdout | | -->|playback | output
| ---------------------- | | -----------------------
--------------------<------+-*
---------<-------------------+-+----------------------------------
| ------------------------ | | ----------------------- |
-->|legacy spdif.output. |--+-*-->|spdout | |
-->|wave playback | ----->|spdin spdif.monitor |---- |
| ------------------------ NC-|off | | |
---------<-- spdif ----------------------- | |
-------+------- dac ----------------------------- v |
wave -->|playback.mode|---->|inputs.dac|-*->|inputs.dac.mute|->----- |
playback --------------------------- R ----------------- | + | |
-------------------------------------- |mix| |
FM synthesizer -->|inputs.fmsynth |--*->|inputs.fmsynth.mute|-->----- |
----------------- R --------------------- *->--
CD ---------------------- --------------------------- v
LINE-IN ->|inputs.{cd,line,aux}|-*>|inputs.{cd,line,aux}.mute|->-----
AUX ---------------------- R --------------------------- | |
------------------ | |
PC-SPK -->| inputs.speaker |----------------------------------->| + |
------------------ | |
------------------------------------------------ |mix|
MIC --*-->|inputs.mic.preamp|->|inputs.mic|->|inputs.mic.mute|->| |
| -----------------------------------------------------
| ----------------------------- |
--->|record.mic|-->| | v
------------ | record.source |-->to -----------
*R-->| (select, mix) | recording |outputs.*|-->
---------------------------- SPK
(front)
Note the 2nd SPDIF input exists only on CMI8738/PCI-6ch versions.
MIXER EXAMPLES
Here are examples about wave playback and SPDIF input/output ports.
Playback to speaker, SPDIF input to SPDIF output
mixerctl -w playback.mode=dac spdif.output=spdin spdif.monitor=off
Playback to SPDIF output, SPDIF input to speaker
mixerctl -w playback.mode=spdif spdif.output=playback spdif.output.playback=wave spdif.monitor=spdin
SPDIF input to both SPDIF output and speaker
mixerctl -w spdif.output=spdin spdif.monitor=spdin
Playback to both SPDIF output and speaker
mixerctl -w playback.mode=spdif spdif.output=playback spdif.output.playback=wave spdif.monitor=spdout
Mix playback and SPDIF input to speaker
mixerctl -w playback.mode=dac spdif.monitor=spdin
SEE ALSO mixerctl(1), audio(4), midi(4), mpu(4), opl(4), pci(4)HISTORY
The cmpci device driver appeared in NetBSD 1.5.
BUGS
4ch/6ch playback is not yet available. Joystick port is not supported.
spdif.output.playback=legacy does not seem to work properly.
BSD June 22, 2005 BSD