vpme.de t43 price : $129.99

a switchable precision adder and 43 semitone transposer in 4hp

the sum output gives the sum of cv inputs a and b and can add or subtract cv input c. the switches allow to add or subtract 1, 2, 4, 12 or 24 semitones so a total of 43 semitones or 3.5 octaves can be added or subtracted from the cv sum.

e.g to add a fourth (5 semitones) use switches +1 and +4, to add a minor seventh (10 semitones) use switches +1 oct and -2

t43 uses precision opamps and voltage references in order to give you perfect tuning across the whole transposition range

download the users manual here.