[mc.mixdown~] Scaling @autogain with 'voice' count?

I'm using the autogain attribute with [mc.mixdown~] to keep the 8 chans of my mc patch in check. I am mainly using 1 chan or 'voice' at a time, and dynamically playing and stopping [play~] loops inside the [mc.play~] wrapper to create a soundscape with offset loops. However because [mc.mixdown~] assumes all 8 chans are active at the same time, playing only 1 channel with autogain on causes a huge drop in volume compared to playing with the autogain attribute off.

Is there any way to scale the 'autogaining' so that it scales with the amount of currently active mc chans / 'voices'? I understand it scales equal to the output channel count divided by the input channel count, can I trick it into thinking there is less input channels than there really is?