[sdiy] Re-amping device

[Paul Perry]

At first glance you would think all one needs is to get the levels right, to
drive the effect.
And for synth stuff that would - I think - be true.

But I have heard of the guitar guys having to use more elaborate setups,
because of the weird input impedances that some classic guitar effects have.
Some guitar effects assume that you are driving them from a guitar
(reasonably enough). You can fool them, but just taking the signal level
down to an appropriate level - maybe by an impedance matching transformer,
maybe by a simple op amp or transistor circuit with a gain of 1/20 - and
putting a guitar pickup in series with the output.
The idea is to have a low (or negligible) impedance from the amplifier or
transformer, then put the guitar coil in series with the output, and this
makes the signal look as though it is coming from a guitar.
How essential is it? Depends on the effect. It wouldn't make a difference
with any modern effect.

The short of it: I expect it only matters for guitar, and then only if you
are obsessive and using some vintage fx designs.

paul perry Melbourne Australia