Moog Music Little Phatty Stage II - Manual (Page 43)

Page 44
LP Stage II User’s Manual - The User Interface
Page 45
LP Stage II User’s Manual - The User Interface
Notes: All calibration procedures should be thoroughly reviewed before proceeding. Observe the following
precautions and recommendations before attempting any calibration operation.
1. The LP must be at a stable and constant temperature during calibration. You should allow the LP to
warm up 30 minutes before beginning any calibrations.
2. The Note Calibration procedure takes about two hours to cover the full MIDI note range. If you are
performing this calibration, allow sufficient time for the calibration process to complete.
3. The LP is calibrated at the factory. The Note Calibration operation is not necessary unless the LP
goes out of tune. The Note Calibration overwrites the current calibration lookup table (LUT). Performing a
Factory Restore operation will not cause the LUT to revert to the factory calibration.
4. You can exit out of a calibration at any time by pressing the MASTER button. For the Note Calibration
operation, only those notes that have already been calibrated will be saved. The remaining notes will
revert to their previous calibration values. Interrupting the Note Calibration operation in this manner may
result in inaccurate tuning.
5. Note Calibration is not meant for overall tuning drifts, such as if the LP is 10 cents sharp. Small tuning
drifts are best taken care of using the AutoTune function.
6. If you perform a Note Calibration, it is highly recommended that you also perform the Oscillator 2
Frequency Calibration to ensure accurate frequency tracking with the new LUT.
The sixth page of the System Utilities menu allows you to calibrate the
Little Phatty. In the past, calibration of analog synthesizers had to be
performed manually by experienced service personnel. The LP’s built-
in calibration utilities now allow you to perform many of these proce-
dures yourself, without the expense and hassle of shipping the LP back
to the factory for calibration. The LP’s calibration utilities allow you to
perform individual calibrations on the pitch wheel, oscillators and note
range. For example, the Note Calibration operation individually tunes
each note exactly for each oscillator and octave setting. This tuning
information is stored in the LP’s EEPROM and referenced when play-
ing a note to guarantee that the LP’s oscillators will be in tune. Other
calibrations ensure that variable controls such as the pitch wheel and
oscillator 2 detuning function predictably and precisely.
To access the calibration options, press ENTER, then use the VALUE
knob to select the desired calibration.
While the restore process is taking place, the LCD will briefly
display a ‘RESTORING FACTORY DEFAULTS’ message. When
complete, the screen will return to the System Utilities menu.