> Hi,
>
> i can feed any external signal in the DE external input
> For example i can feed the audio that come from an external
> keyboard or from one of my pedals Or i have to preamp it
>
>
> thanks in advance
> diego

You can feed any audio signal with line level to the DE audio input (i.e.
typ 1V level). But it's not possible to use a microphone or electric guitar.
These need to be amplified. If you want to adjust the level of the external
signal (in relation to the internal VCO) and external attenuator (e.g.
A-183-1) or amplifier/attenuator (e.g. A-183-3) is recommended.

Best wishes
Dieter Doepfer