Moog Music Forum

Hey Moogers,
My Slim Phatty has been operating fine since I got it about 7 months ago, but in the past week it's been drifting by a considerable amount, octave to octave. I've followed through on the manual's calibration instructions several times but it's still consistently pitchy. Another thing to note is that the Fine Tune's Auto mode is stuck on 48.00 instead of the usual 60.00, even after 24 hours of being powered up. Does you guys know what this might be?

Try disconnecting your midi input while the unit is warming up. It could be that something in your rig is sending note-ons to your phatty while it is trying to tune....

You can manually change the AutoTune target value back to 60.00 using the Value knob. Here are the instructions from the LP Stage II manual (I bet it's the same for the SP):

"When AutoTune is enabled, the display shows the actual value of the
last note played (displayed as the MIDI note number, shown here as
‘60’), and the current tuning value (displayed in cents, shown here as
‘.00’). In this mode, the LP will continually tune to this value. To adjust
the note that you are tuning to, cursor over to the Note value in
the display and use the VALUE knob for precise adjustments. Hitting
another note on the keyboard will set that note as the new target for
tuning. You can exit out this menu by hitting the MASTER or PRESET
buttons, and the LP will remain in the AutoTune mode, maintaining the
current tuning."