Audison bit Ten Secret Channel Mapping

    

The Audison bit Ten car audio processor has 4 input channels and 5 output channels.
When configuring the bit Ten using the Windows application you can select between 4 modes. Each mode has a different mapping of inputs to outputs.

This mapping is not described in the user's guide or made visible in the application. So I measured the mapping by inputting a signal on one input at a time, and measuring on which outputs the signal appeared, and at what level.

I measured for all 4 modes, but only for a set up with 1 subwoofer channel and 4 left/right channels.

Mode: FL + FR + RL + RR

Input		Output
FL	➜	CH1 (Front L)
FR	➜	CH2 (Front R)
RL	➜	CH3 (Rear L)
RR	➜	CH4 (Rear R)
FL -6dB FR -6dB RL -6dB RR -6dB	➜	CH5 (Sub)

Mode: FL + FR + SubL + SubR

Input		Output
FL	➜	CH1 (Front L) CH3 (Rear L)
FR	➜	CH2 (Front R) CH4 (Rear R)
RL -3dB RR -3dB	➜	CH5 (Sub)

Mode: FL + FR

Input		Output
FL	➜	CH1 (Front L) CH3 (Rear L)
FR	➜	CH2 (Front R) CH4 (Rear R)
FL -3dB FR -3dB	➜	CH5 (Sub)

Mode: FLTw + FRTw + FLWf + FRWf

Input		Output
FL -0dB RL -0dB	➜	CH1 (Front L) CH3 (Rear L)
FR -0dB RR -0dB	➜	CH2 (Front R) CH4 (Rear R)
FL -3dB FR -3dB RL -3dB RR -3dB	➜	CH5 (Sub)

This mode is for when the input signals are filtered for a tweeter (Tw) and woofer (Wf). So the front and rear input signals should not overlap in frequency. Therefore they are summed at full level (-0 dB).
To the subwoofer the signals are summed at -3 dB, probably because the tweeter signals are not meant to have any subwoofer frequencies. But still they are added to the subwoofer channel.