[sdiy] Clipping summing opamp issue..

[Jean-Pierre Desrochers]

Hi list,

Suppose the following setup:
6 VCO's wave outputs wired to summing amp inputs.
Each VCO has +/-5vpeak waveforms. (10vpp)
At some points all VCO's will allign their
peak levels all together. 
That means 6 X 5vpeak = 30vpeak (instantaneous)
positive or negative.. doesn't matter here.
This means clipping to me for normal summing
opamps supplied to +/- 15vdc.. ??
How do you guys manage this overvoltage situation?
By reducing the summing gain of the receiving opamp?
If so let's reduce the summing opamp to 50%.
Then if sometime we receive only one wave form
to this opamp it's gonna be attenuated at 50%...
bad thing to me. 
Conclusion, to me a autovariable gain (compressor)
summing amp would be neat here keeping a strong level
but never clipping..
What do you do in your projects to overcome this?

JP