Doepfer

I'm having a few problems with pitch.
If I take a voltage out of the 155 - through a splitter to a 111 & two 110's. I can't get the three in tune with each other. The two 110's are similar, but the 111 is about a fifth out, and the tune knob hasn't a big enough range to fix this.
I thought maybe the splitter was the problem as the pitch was different after the splitter, so I got a bus access to send the 155 voltage into the bus to the oscillators - this didn't help and seemed to go more out of tune.

Any ideas. Is there some internal adjustment on the oscillators which needs adjusting?
Also if I take a voltage and want to split it to control the pitch of a few oscillators then what is the best way? I also picked up a buffered splitter off Analogue Solutions which I thought might be more stable with voltage.

peace James

Hello James

> Any ideas. Is there some internal adjustment on the oscillators which needs adjusting?
> Also if I take a voltage and want to split it to control the pitch of a few oscillators then what is the best way? I also picked up a buffered splitter off Analogue Solutions which I thought might be more stable with voltage.
Trimmer P7 on the A-111 mainboard (the one of the three trimmers, which 
is the closest to the front potentiometers) is the one, which you can 
use to adjust the so called offset tuning. Do not touch any other trimmer.

Florian

> Hello James
>
> > Any ideas. Is there some internal adjustment on the oscillators
> which needs adjusting?
> > Also if I take a voltage and want to split it to control the
> pitch of a few oscillators then what is the best way? I also
> picked up a buffered splitter off Analogue Solutions which I
> thought might be more stable with voltage.
> Trimmer P7 on the A-111 mainboard (the one of the three trimmers, which
> is the closest to the front potentiometers) is the one, which you can
> use to adjust the so called offset tuning. Do not touch any other trimmer.
>
> Florian

In addition there is also a document on our website:

www.doepfer.de/a100_man/A111_Adjust.htm

Best wishes
Dieter Doepfer

Thanks Florian & Dieter,
I'll check the instructions and adjust my A111.
James