Yamaha montage6 Owner's Manual page 71

 When the Part produces a wrong pitch, is the appropriate tuning system selected from the Micro Tuning parameter?
• In case of Normal Part (AWM2) and Drum Part
[EDIT]  Part selection  ELEMENT/OPERATOR [COMMON]  [Part Settings]  [Pitch]  "Micro Tuning Name"
• In case of Normal Part (FM-X)
[EDIT]  Part selection  ELEMENT/OPERATOR [COMMON]  [Pitch/Filter]  [Pitch]  "Micro Tuning Name"
 When the Part produces a wrong pitch, is the LFO Pitch Modulation Depth set too high?
• In case of Normal Part (AWM2)
[EDIT]  Part selection  Element selection  [Element LFO]  "Pitch Mod"
• In case of Normal Part (FM-X)
[EDIT]  Part selection  ELEMENT/OPERATOR [COMMON]  [Mod/Control]  [2nd LFO]  "Pitch Modulation"
 When a Part produces a wrong pitch, are Coarse tune and Fine tune settings appropriate?
• In case of Normal Part (AWM2) and Drum Part
[EDIT]  Part selection  Element/Key selection  [Osc/Tune]  "Coarse"
[EDIT]  Part selection  Element/Key selection  [Osc/Tune]  "Fine"
• In case of Normal Part (FM-X)
[EDIT]  Part selection  Operator selection  [Form/Freq]  "Coarse"
[EDIT]  Part selection  Operator selection  [Form/Freq]  "Fine"

When the Part seems to produce the wrong pitch, is the destination of the controller set to "Pitch"?
[EDIT]  Part selection  [Mod/Control]  [Control Assign]  "Destination"
No effect is applied.
 Is the Effect Switch turned off?
[UTILITY]  [Effect Switch]

Is the Variation Send or Reverb Send set to a value other than "0"?
[EDIT]  Part selection  ELEMENT/OPERATOR [COMMON]  [Effect]  [Routing]  "Var Send"
[EDIT]  Part selection  ELEMENT/OPERATOR [COMMON]  [Effect]  [Routing]  "Rev Send"
 Is the Variation Return or Reverb Return set to a value other than "0"?
[EDIT]  PART [COMMON]  [Effect]  [Routing]  "Var Return"
[EDIT]  PART [COMMON]  [Effect]  [Routing]  "Rev Return"
 Have any or all of the Element/Keys' Insertion Effect Output parameters been set to "thru" in the effect setting?
[EDIT]  Part selection  ELEMENT/OPERATOR [COMMON]  [Effect]  [Routing]  "Element 1-8"
 In case of System Effect, have any or all of the effect types been set to "No Effect"?

In case of Insertion Effect, have any or all of the effect types been set to "Thru"?
 Check whether the Insertion Switch parameters are set properly or not.
[EDIT]  Part selection  ELEMENT/OPERATOR [COMMON]  [Effect]  [Ins A]/[Ins B]
Cannot start the Arpeggio.
 Check whether the [ARP ON/OFF] button is turned on or off.
 Count the number of Parts whose Arpeggio switches are turned on.
You can play back the Arpeggios of up to eight Parts simultaneously.
 Are the Arpeggio related parameters such as Note Limit and Velocity Limit set appropriately?
[EDIT]  Part selection  ELEMENT/OPERATOR [COMMON]  [Arpeggio]  [Common]
 Is the Arpeggio Type parameter set to "off"?
[EDIT]  Part selection  [Arpeggio]  [Individual]  "Name"
Troubleshooting
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MONTAGE Owner's Manual