Recording multichannel audio from Roland octa capture

[noviceaudio]

I have a roland octa-capture usb device. I want to capture the audio from its 8 inputs.

I checked lsusb, and got

Bus 002 Device 019: ID 0582:0120 Roland Corp.

Next, I went into alsamixer, and switched the device to OCTA-CAPTURE, and it says "This sound device does not have any audio controls", which is not a good sign.

Next, I opened up audacity, and I can see OCTA-CAPTURE as one of the possible recording options. The options I have are

OCTA-CAPTURE: USB Audio (hw:2,0): Front Mic 0
OCTA-CAPTURE: USB Audio (hw:2,0): Rear Mic 0
OCTA-CAPTURE: USB Audio (hw:2,0): Line 0
OCTA-CAPTURE: USB Audio (hw:2,0): Front Mic 1
OCTA-CAPTURE: USB Audio (hw:2,0): Rear Mic 1
OCTA-CAPTURE: USB Audio (hw:2,0): Line 1

I see 6 things while there should be 8. Also I don't know what the mapping from the ports on the hardware to the labels in Audacity are.

Anyway, I chose one of the options and then proceeded to connect a mic to all 8 input ports, but all i get in white noise.

Any help at all would be appreciated.

[steve]

Roland say that Linux is not supported.
Reports from Linux users that I've been able to find from searching the Internet all say that the Roland OCTA-CAPTURE USB does not work on Linux.
I did find one old message where someone said they were able to use it by running Windows XP in Virtualbox - they gave no details, and running audio capture in a virtual machine is far from ideal, but if you have an old copy of XP kicking around, it may be worth trying that.