Grid View and Filter : Feature Request

This is a feature request for Grid Filter or Grid View Modes. The purpose of the feature is to temporarily change the Grid lines behind figures to give a better understanding of what is actually happening tonally and provide more direct editing capabilities. The manual states "The line grid says almost nothing about the true pitch of the notes produced." While this is due to the nature of the unique characteristics of the Phrasing system, it can also cause unnecessary confusion. This feature would help bridge traditional MIDI sequencing with Synfire's approach.

There have been similar requests on this forum listed here.
(https://users.cognitone.com/node/1477)
(https://users.cognitone.com/node/1414)

Addressing the Issue:
With Interpretation Voice Leading set to 'None' one is able to compose in the restraints of the current Scale. Since the Grid has somewhat arbitrary meaning, many 'slots' often have the same pitch. [With one symbol selected, pressing the Up key will move up the grid, but this does not mean it will move up the scale diatonically, rather it will sometimes repeat a note] This can be frustrating when one has to 'find' the desired note in the Grid Line. Another problem with this design occurs when transposing a figure up/down on the Line Grid. This is especially true when using scales with many half-steps.
[If a figure is created with a diatonic pattern 1-3-2-4 (ex melodic minor scale) and one would like to move the whole diatonic pattern up one step 2-4-3-5, the whole figure must be redrawn to find the notes, as using the arrow key UP one step puts some of the symbols in different Grid Line slots that have the same pitch. The output becomes 2-4-3-4]

In short Synfire lacks an intuitive nature when trying to compose parts selectively with Interpretation off.

The solution is to have Grid View Modes or Filters:

-Horizontal Scale: each slot signifies one note of the set diatonic scale
-Vertical Scale: same as above
-Arpeggio: each slot represents one step of the chord tones *only Arp and Chord Figures Editable

The Filter essentially collapses the grid by eliminating repeating notes and directly shows the available notes specified by harmonic context.

(The slots would operate similar to a normal piano roll - notes cannot be placed slightly above/below or on the line between the slots like in the current Grid)

Since Synfire is already conforming the given harmony section to these parameters, it may not be difficult to filter the way the grid is being displayed and it would be very valuable and intuitive when composing, massively simplifying input and ridding of guesswork.

A further idea: A global check box could initiate a full piano roll, with only tones from current scale set editable. This would give users moving to Synfire a traditional view of what is happening in their composition.
It was noted by the developer that editing in mentioned Views/Piano Roll would not be possible with Interpretation turned on, as it would defeat the nature of Interpretation itself. This may be the case, however, displaying the different Grid Views/Piano roll would give the composer a greater understanding of how their figures are being translated and a better sense of the project from a traditional standpoint. [ A note could be added under the View stating that edits can only be made with Interpretation turned off. ]

I feel that implementing this feature is feasible from a developer's standpoint and would add a significant level of control to Synfire all while bridging the gap between prototyping and sequencing.

mock-up (GridFilter.jpg)