Doepfer

Hi,

Sorry for the semi offtopic. I have a MS404 which has a problem with 
MIDI to CV conversion. The CV for the pitch and the VCF are only 0.5 
Volt per Octave instead of 1.0 Volt/Octave.

If there is someone who owns a MS404 and is technically enabled to do 
some measuring I would appreciate if he could check the voltages at pin 
12 of IC15 MAX 512 (=Reference voltage for the D/A-converter)
and the voltage at pin 7 of IC16 at different octaves.

Positions of the chips see http://fa.utfs.org/diy/ms404/ms404-1.jpg
Schematics see http://fa.utfs.org/diy/ms404/ms404-schematic-digital.jpg

At my MS404 the reference voltage mesaures around 2.53 Volt. The output 
of O23 (IC16) reads ~0.51 Volts/Octave.

Thank you very much for your help!

Florian