Behringer DEEPMIND 6 Manual - Page 31

CALIBRATE Calibration Menu

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31 DeepMind 6 User Manual CALIBRATE (Calibration Menu) This menu in the SYSTEM SETTINGS menu allows you to perform CALIBRATION of the VOICES, MOD WHEEL, PITCH WHEEL, AFTERTOUCH and PEDAL INPUT. 1. To navigate the options in the CALIBRATION menu, use the BANK/UP or BANK/DOWN switches. 2. Selected parameters are adjusted using the -/NO or +/YES switches, the rotary knob or the DATA ENTRY fader. The rotary knob has a click which allows very accurate control. The fader allows rapid adjustment across the full range. 3. In order to start a calibration routine, make sure that the '

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31
DeepMind 6 User Manual
CALIBRATE (Calibration Menu)
This menu in the SYSTEM SETTINGS menu allows you to perform CALIBRATION of
the VOICES, MOD WHEEL, PITCH WHEEL, AFTERTOUCH and PEDAL INPUT.
1.
To navigate the options in the CALIBRATION menu, use the BANK/UP or
BANK/DOWN switches.
2.
Selected parameters are adjusted using the -/NO or +/YES switches, the
rotary knob or the DATA ENTRY fader. The rotary knob has a click which
allows very accurate control. The fader allows rapid adjustment across the
full range.
3.
In order to start a calibration routine, make sure that the '<' symbol on the
appropriate CALIBRATE line is highlighted, and then press the +/YES switch.
The DeepMind 6 has 6 voices. Each voice has its own LFO, OSC, VCF, ENV and
VCA stages.
The CALIBRATION routine is used for Voice checking, OSC wave shapes, VCF self-
oscillation, Pulse Width modulation and the VCA bias.
VCF
- Unlike many other synthesizers, the DeepMind 6 is capable of accurate
pitch tracking even when the filter resonance is pushed to (and past) the
point where the filter starts to self-oscillate. When using this self-oscillating
feature of the VCF as a sound source, the VCF calibration ensures the correct
response when playing the entire scale of the keyboard.
The DeepMind 6 VCFs are calibrated at the factory during production.
However, because its filters are voltage controlled and can be affected
by extremes of temperature, you may need to use the built-in calibration
function to fine tune them occasionally. Calibration may also be required
after a firmware upgrade or when requested to do so by an authorized
Behringer support technician.
OSC
- The DeepMind 6 OSCs are calibrated at the factory during production.
The oscillators are discrete analog circuits, but they are digitally controlled.
Compared to a Voltage Controlled oscillator (VCO), the OSC has far superior
stability, especially when they have very high frequency, low-jitter master
clock sources, as used in the DeepMind 6. This stage calibrates the slope of
the sawtooth waveform to ensure even volume and pulse-width across the
full range of the synthesizer.
This means that the OSCs should never need re-calibrating except after a
firmware upgrade, or when requested to do so by an authorized Behringer
support technician.
CALIBRATE VOICES
Overview of the calibration routines:
•
ALL
- This will initiate all of the routines.
•
VOICE CHECK
- This performs a series of functionality tests on each voice.
•
VCF
- This routine puts the voice into self oscillation and tunes to 1 kHz in
order to calibrate the resonance of the VCF for that voice. The routine then
puts the voice into self oscillation and checks the tuning at 50 Hz, 220 Hz,
880 Hz and 10 kHz to ensure the VCF is performing as expected. The test is
repeated for all voices.
•
VCF FINE
- This routine tests the scale and offset for all voices.
•
OSC
- This routine adjusts the slope of the sawtooth at octave intervals. This
ensures the precision of the slope so that it performs as designed. The test is
repeated for all voices.
•
PW
- This routine adjusts the pulse width (mark to space ratio) of the
pulsewave. This ensures the precision of the ratio so that it performs as
designed. The test is repeated for all voices.
•
VCA
- The Voltage Controlled Amplifier (VCA) uses a bias voltage to set its
operating level. This bias voltage is balanced so that the VCA responds as
designed. The test is repeated for all voices.
To start the calibration routine, please follow the procedure below:
1.
In order to start the calibration routine, make sure that the '<' symbol is on
the appropriate CALIBRATE line and highlighted, and press the +/YES switch.
Note:
The calibration run time is shown on the bottom of the screen so that
you can plan your work around any of the calibration phases.
2.
The calibration routine will then start. Throughout the tests you will see
various waveforms being played. It is safe to turn down the volume while
the calibration routine is running.
Note:
While the calibration is running, you can mute the signal using the
BANK/DOWN switch and un-mute using the BANK/UP switch.
3.
When the calibration routine is complete, you will see a summary of the test
results as shown below. The 1st column is Voice 1, 2nd is Voice 2, and so on:
Note:
During the calibration, the GLOBAL and -/NO switches will be flashing.
If at any time you want to cancel the calibration routine, you can press the
-/NO switch. No previous calibration data will be changed if you cancel
the routine.