Problems with USB MIDI cable
Posted: Wed Mar 19, 2014 3:29 pm
Hi,
I got myself a cheapo USB MIDI cable from ebay, mainly for playing around, and I have some weird problems.
Besides my computer on Opensuse 12.3, I have a Roland SC-55 sound module and a PC-200 Mk. II keyboard.
MIDI output works perfectly, i.e. playing MIDI files to the SC-55.
When I connect the PC-200 directly to the "In"-cable, nothing happens. No LED flickering and kmidimon doesn't see any packets.
When I connect the PC-200 to the SC-55 MIDI in and the USB MIDI in cable to the SC-55's MIDI thru, the MIDI in LED on the cable is flickering and notes come to the computer, however, also lots of trash. E.g. when I move the volume controller, the computer sees some stray note on/off packets in between.
Connecting the PC-200 directly to the SC-55 also (of course) works without any problems.
-Stefan
Edit: dmesg:
[25532.661216] usb 4-3: new full-speed USB device number 2 using ohci_hcd
[25532.807912] usb 4-3: New USB device found, idVendor=1a86, idProduct=752d
[25532.807924] usb 4-3: New USB device strings: Mfr=0, Product=2, SerialNumber=0
[25532.807931] usb 4-3: Product: USB2.0-MIDI
[25533.116601] ALSA clock.c:237 5:3:1: cannot get freq at ep 0x84
[25696.751138] ALSA clock.c:237 5:3:1: cannot get freq at ep 0x84
[25696.775193] ALSA clock.c:237 5:3:1: cannot get freq at ep 0x84
I got myself a cheapo USB MIDI cable from ebay, mainly for playing around, and I have some weird problems.
Besides my computer on Opensuse 12.3, I have a Roland SC-55 sound module and a PC-200 Mk. II keyboard.
MIDI output works perfectly, i.e. playing MIDI files to the SC-55.
When I connect the PC-200 directly to the "In"-cable, nothing happens. No LED flickering and kmidimon doesn't see any packets.
When I connect the PC-200 to the SC-55 MIDI in and the USB MIDI in cable to the SC-55's MIDI thru, the MIDI in LED on the cable is flickering and notes come to the computer, however, also lots of trash. E.g. when I move the volume controller, the computer sees some stray note on/off packets in between.
Connecting the PC-200 directly to the SC-55 also (of course) works without any problems.
-Stefan
Edit: dmesg:
[25532.661216] usb 4-3: new full-speed USB device number 2 using ohci_hcd
[25532.807912] usb 4-3: New USB device found, idVendor=1a86, idProduct=752d
[25532.807924] usb 4-3: New USB device strings: Mfr=0, Product=2, SerialNumber=0
[25532.807931] usb 4-3: Product: USB2.0-MIDI
[25533.116601] ALSA clock.c:237 5:3:1: cannot get freq at ep 0x84
[25696.751138] ALSA clock.c:237 5:3:1: cannot get freq at ep 0x84
[25696.775193] ALSA clock.c:237 5:3:1: cannot get freq at ep 0x84