I may be having an issue but I don’t know if what I am experiencing is representative of normal behavior. In FMOD I’m using Standard Metering Channel Order. Just so there’s no question, my OS X system/interface output works just fine for other purposes (surround panning in a DAW, listening to a surround speaker output test), when set up in this standard order:
L-1, R-2, C-3, LFE-4, L Surr-5, R Surr-6, L Rear- 7, R Rear-8
When panning in FMOD, even restricting to only one speaker output, like this…
…the meters clearly show that audio is only leaving the event on channel 5 (Left Surround). But my system output looks like this:
Obviously, the expected result is audio coming out of only output 5. But there’s a nontrivial spillage coming out of 1 & 7 as well.
If I pan to only Left Rear, I get this result:
Channel 5 is even hotter than 7, which is where 100% of the audio should be coming from. But there’s even spillage into channel 6 (Right Surround).
Also to note is that L, C, R work as expected in FMOD when audio is panned in their zones.