Arturia Forums
Hardware Instruments => MiniBrute => Topic started by: oyarsa on April 25, 2016, 02:31:54 am
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In searching for the proper calibration method for my MiniBrute I have come across "Technical Note 06" which is for the MicroBrute. I assume the calibration technique is similar for both instruments, however I need to be clear which trimmer pot is "OFFSET" and which one is "SLOPE".
The 2 holes are in a different location on the Mini so clarification would be helpful. When looking at the back panel (keys facing away) which one is "OFFSET" and which is "SLOPE"?
Thanks!
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Hi,
You need Technote 01 for the Minibrute,
It says something like this:
let the synth warm up for at least 10 min
Connect a digital tuner to the output,
Slide up the sawtooth waveform fader to maximum level.
Press the Octave buttons until reaching the center position: green LED is lit.
Make sure the Fine Tune knob is at center position.
Find a plastic (!!) 2mm flat screwdriver,
First:
Press the lowest key on the left of the keyboard, and hold it down.
The frequency should be a perfect C at 130.80 Hz (0 cent).
If it is not the case, turn the Slope trimmer to reach this value.
The Slope trimmer is nearest the MIDI in/outs, the other one is the Offset trimmer
Then:
1) Press the upper most key on the right of the keyboard and hold it down.
Turn the Offset trimmer to reach C at 523.30 Hz (+/- 5 cents).
2) Press the lowest key on the left of the keyboard, and hold it down.
Turn the Slope trimmer to reach C at 130.80 Hz (+/- 5 cents).
Repeat steps 1) and 2) until both notes are in tune (+/- 5 cent)
Full “0-cent accuracy” can not be achieved: +/- 5 cents tolerance generally is OK.
Expect some drift at the extremes (up to +/- 20 cents): C-3 will *not* be accurate, neither will be C5.
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Very helpful....Thank you.