2 channels only output from Saffire Pro 24

[jwkb]

I'm using a Saffire Pro 24 for MIDI input and audio output for running GrandOrgue on 64 bit Lubuntu 14.04 kernel 3.19.
MIDI is fine but I can only get stereo output, not the full 6 channels. Running
speaker-test -c 6 -t wav
only ever outputs channels 0 and 1 (Left and Right Front). These come from Saffire physical outputs 1, 2 and also from 3, 4. There is never any output from 5,6.
I cannot get channels 2,3,4,5 from speaker-test to ever come out of the Saffire.

This is 'as is' following installation of Lubuntu and the GrandOrgue software. I haven't changed any audio settings or installed anything else. Onboard audio is disabled in BIOS.

Does anyone have suggestions on what I need to do to get the full 6 channel output?

(I found a link on LinuxMusicians for getting the saffire pro 40 working:
http://www.audiorecording.me/focusrite- ... ide.html/2
however I haven't followed it as my understanding is that firewire is now handled through the kernel instead of using ffado)

[jwkb]

Problem solved - the companion Windows software Saffire Mix Control stores last used settings into the hardware so it can be used stand-alone. After resurrecting the old Windows drive I found the routing I had described exactly matched what was showing in Mix Control. All six channels now working correctly, but it would be nice to be able to control the hardware from Linux.

[varpa]

There is a ffado-mixer for the Saffire Pro 24 so you can configure it from linux. Try the command "ffado-mixer". There is documentation (in French) about the Saffire Pro 40 mixer which is similar to the Pro 24, just with more channels here:
http://www.linuxmao.org/ffado-mixer+saffire+pro+40