VigaMusicTools intraMic User Manual page 18

How to actually adjust the preamp's input gain ?
The adjustment is made with the screwdriver provided, wich you should insert
very gently into the hole at the back of the preamp housing. The increase in
gain is made by turning slowly clockwise.
The orange LED serves as an input level indicator. When you play fortissimo,
the LED should slightly dim, but not go out cleanly. Insist especially on the note
high B, high F # and higher overtones.
For all intents and purposes, please find below general indications of settings,
which however remain largely dependant on your equipment and type of
playing.
soprano
sax.
Adjustment zone where the first saturations are encountered
Adjustment zone without risk of saturation
18
alto tenor
sax. sax.
barytone soprano
sax. clar.
bass
clar.