mpu-401 uart

как настроить midi в gentoo
1)Я сделал все как написано в руководстве, но все равно не работает.
2)Что такое mpu-401 UART

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localhost koder # aplaymidi -l
Port Client name Port name
20:0 MPU-401 UART MPU-401 UART MIDI
128:0 TiMidity TiMidity port 0
128:1 TiMidity TiMidity port 1
128:2 TiMidity TiMidity port 2
128:3 TiMidity TiMidity port 3

-------------------------------------------------------------------

cat /proc/asound/oss/sndstat

Sound Driver:3.8.1a-980706 (ALSA v1.0.12rc1 emulation code)
Kernel: Linux localhost 2.6.18-gentoo #1 SMP Mon Oct 9 09:56:59 Local time zone must be set--see zic m x86_64
Config options: 0

Installed drivers:
Type 10: ALSA emulation

Card config:
NVidia CK804 with ALC850 at 0xfe02d000, irq 217
MPU-401 UART at 0x330, irq 10

Audio devices:
0: NVidia CK804 (DUPLEX)

Synth devices: NOT ENABLED IN CONFIG

Midi devices:
1: MPU-401 UART MIDI

Timers:
7: system timer

Mixers:
0: Realtek ALC850 rev 0
1: mixer10

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aplaymidi --port=20:0 Sobaka_baskerv.midi

Cannot connect to port 20:0 - Input/output error
-------------------------------------------------------------
aplaymidi --port=128:0 Sobaka_baskerv.midi
звук не выводится.