I use a 4 channel - wav file in a Studio event which is distributed correctly to the two front and the two surround speaker channels (channels 0, 1, 4, 5). In order to have an output on the subwoofer (channel 3) I created a Mix Matrix that takes 25% of each input channel and routes it to the subwoofer channel.
However it happens randomly (NO changes in the code) that the center speaker also shows a signal and sometimes not. Setting the respective entries with setMixMatrix to 0.0f for the center (channel 2) has no effect.
Windows 7 32 bit
FMOD Studio API 1.04.04
Sound Interface: Focusrite Scarlett 18i20
Thanks for your help in advance!