Doepfer

Hi Nick

> 1.  The schematic for the A-110 shows Linear FM and Soft Sync 
> options.  Are these possible?  
I added them and it works fine (to be true: I did not add, but I moved 
the log-FM-Input to the lin-FM-connector and did the same with 
soft/hard-sync. I hope there will be some day, I will add switches to 
the module...

> 2.  What value pot/resistor would need to be added to make a Fine 
> tune control for A-110, and where to connect on circuit board?  I 
> compared 110 to 111 visually, couldn't decide....
If you want to add an pot then add the combination of R9/P1/R5 (connec 
it to the same point). The value of R5 defines the amount of the tuning 
pot. A value of 10 Mega-Ohms should be good for a fine tune pot (this 
value is estimated).

> 3.  Has anyone added CV control to A-140, 145, 146?  
You need completely different circuits to CV-control the ADSR or LFO. 
Due to this A-141 and A-147 exist.


> 4.  Has anyone tried to add Resonance Insert to any filters, 
> especially the Wasp?  I did.....mixed results.  
I do not have the wasp filter, but I did it with other filters. As you 
said: The results are mixed. There are some modules, which have an 
remarkable effect on a normal audio signal, but the effect in a 
resonance loop is quite boring (the opposite is also valid).
I personally like to distort/waveshape the resonance signal; a phaser in 
the resonance loop is not that amazing ;-)

There is also one aspect to be kept in mind: The effect of the resonance 
depends completely on the phase relation of the signal. So: If a module 
reverts the phase of the signal, the amount of resonance may change 
completely. So perhaps a A-175 is required to revert the phase again.


Florian