MOTM

Something to be aware of........

When the Mixer is is dual 3:1 mode, each set of pots is set for full dynamic
range. That is to say,
if you have 3 full-scale inputs (-5V to +5V) the output with all pots on
11...err...10 is -5V to +5V.

So, the 'channel gain" is 0.333

But, what happens in 6:1 mode?

On the 'log pot' side, the output is summed into the second mixer with a 1/2
scale factor. So, for
the "audio" side, the channel gain is 1/6 (0.166666).

So: in 6:1 mode the 3 log pot channels are 'full range', 0-10 for their gain
ranges.
the 3 linear pots are at 1/3 channel gain, so they are more sensitive and
cranking all 6 pots to
max will cause the output to be +7.5V to -7.5V pk-pk.

Now, this is *not* going to "blow stuff up" or such. This is just the
MAXIMUM CV range for MOTM modules.
Look in the back of the manuals, I spec -7V to +7V control voltage range.

So, in this manner of compromise, we trade off knob 'sensitivity' in 3
channels to get max range in the other 3
AND still keep the overall output at the max spec limit.

Paul S.

>so they are more sensitive and cranking all 6 pots to max will cause
the output to be +7.5V to -7.5V pk-pk.

What a about a peak LED? Bloody great these things.

I have tried different arrangements with my mixers, and I actually quite
like a through-gain of 1 with the pots maxed out. Somehow it seems to
make perfect sense. Set the control to 10 and get a gain of 1, set a
control for 2 and get a gain of 0.2. For log pots... oh crikey,
perceived loudness???.

Maybe you do need two types of mixer. Analogue Systems have two types...
same PCB but different pots.

AND... I prefer an extra jack output for the bias output. You can
squeeze it next to the switch.

Regards,

Tony Allgood  Penrith, Cumbria, England

My music: www.mp3.com/taklamakan