20 Feb
2006
20 Feb
'06
3:56 a.m.
Adrian Blockley wrote:
I am trying to connect to an external midi device
(casio CTK-900
keyboard) through a cheap soundcard (Cmedia 3738 chip) with
midi interface.
Running
aplaymidi --port 16:0 mysong.MID
produces no output or error message but the following is printed using
dmesg:
cmd: 0xff failed at 0x330 (status = 0xff, data = 0xff)
This means the MIDI port wasn't initialized correctly.
It seems C-Media changed their latest chip revisions in some
incompatible way.
My guess is that the midi i/o port address is wrong.
Now i don't
understand a great deal about PCI but my guess is that the midi i/o port
address on the sound card probably isn't 0x330 (please note I've also
tried 300, 310 and 320).
The driver configures the card to use the port address that was
specified by the user. Well, it tries to.
I've tried using the Windows device manager to
find out what address
port I should be using but i can only find the address of the sound
card and not the mpu401.
The card shadows the MIDI port registers in its main PCI address space,
but the instructions in C-Media's so-called datasheet don't work.
I'd recommend to get another card. Any other card.
HTH
Clemens