Arpangel wrote: ↑Fri Apr 19, 2024 8:25 am
OK, I'm a bit perplexed, and it's my first time using a Farfisa, there seems to be no output volume knob, but there is a volume pedal connected via a 3 pin DIN plug, this doesn’t seem to be working, just tested it.
I dread to ask, but how have you tested it?
It's likely to be a voltage control arrangement rather than straight audio.
Typically, organs of that age used an LDR either as a shunt audio attenuator, or to vary a VCA control voltage. The LDR and light will be inside the expression pedal, with the power to a light bulb controlled by a pot on the pedal. If not plugged in the organ will be at full volume.
So I'd expect a DC voltage on one of the DIN socket pins, ground on another (probably pin 2), and attenuation access to the audio signal or the control voltage on the third.
It also has an "ext-amplifier" output, that doesn’t seem to be working either.
Have you trawled the interweb for user and service manuals? They will undoubtedly answer your questions and help identify any faults.
I found a service manual for the Matador-M quickly, which is probably quite similar.
https://archive.org/details/sm_Farfisa_ ... 7/mode/1up
That document suggests the ext output also comes from the headphone output, so maybe the socket is broken... or try a TS Instrument cable.
It has a headphone out, I’m using that for recording, and its clean, not much noise, although I’m not sure if it's a stereo output...
Unlikely on a mono organ.. but it is probably wired with the same signal on tip and ring, or just on the tip.
... it will only work if the jack plug is pulled half way out.
If the same signal on tip and ring it will cancel out if you plug it to a balanced line input using a TRS-TRS cable! Or, if its just on the tip, try using a standard TS instrument cable.