Gotharman TubaZ, User Manual

Page: 2 / 7

Thank you very much for purchasing / consider to purchase my TubaZ eurorack
module.
Please read this manual before setting up your TubaZ, to avoid malfunction caused
by wrong handling.
TubaZ are a 12 dB tube bandpass filter with the controls CutOzzz, Rezonanz and
Drive. CV control are possible of all 3 parameters. I designed it with the purpose of
adding crunch, edge and distortion to my eurorack system. It is not an ideal
bandpass filter, that cuts off all frequencies above and below the center frequency.
Because of its high drive, there are, in most cases, some bleedthrough of the
harmonics, that should have been cutted off. You might consider calling it a ”Band
Add” filter. The main purpose of it, was to add edge, not to be a perfect bandpass
filter.
CutOzzz controls the center frequency of the filter. Harmonics at frequencies
above and below the cutozzz frequency, are cutted off with a slope of 12 dB.
Because of the structure of this filter, there might be some bleedthrough of
frequencies, that should have been cutted off.
Rezonanz controls the sharpness of the filter.
Drive controls the input level of the audio signal going through the filter. At higher
settings this will cause the filter to distort, depending on the level of the input
signal.
Gotharman, June 2014