Enhance "Enforce Scale" or "Note Range and transpose" midi tool

[TabulaNul]

Is your feature request related to a problem? Please describe. Enforce Scale midi plugin is limited to Major Scale.

Describe the solution you'd like Modify "Enforce Scale" plugin to integrate all the scales that Riban included in the Sequencer. Chromatic, Natural Major, Natural Minor, Melodic Minor, Harmonic Minor, Indian, Oriental, Japanese, Pelog, etc....

Describe alternatives you've considered Enhance "Note Range and Transpose" to integrate scales option.

[riban-bw]

The source for this is at https://github.com/x42/midifilter.lv2/blob/master/filters/enforcescale.c. It may be worth asking Robin (via an upstream feature request) to enhance this or maybe someone can provide a pull request against the upstream project. It would probably need quite some changes though. I would suggest parameters:

• Scale: Defines the relative offsets of each note in each scale, e.g. Chromatic, Major, Minor, etc.
• Tonic: Defines the base note of the scale, e.g. C, C#, D, etc.

Such changes may be unacceptable upstream in which case it may be worth using Robin's code as inspiration for a new plugin.

[TabulaNul]

I opened a feature request https://github.com/x42/midifilter.lv2/issues/33

Otherwise It could be interesting to add this kind of feature directly in "Note and Range transpose" in Zynthian.

[riban-bw]

Ooh yes! I like that idea a lot. It would sit nicely in the key range control. Let's see what the Christmas elves can work up...

[riban-bw]

Before this elves start to whittle will you please describe the workflows that warrant such a feature? I'm not clear on how this works be used so some want to see the wrong thing implemented. Also it helps to understand why a feature is desired, not just what a user (thinks they) want.

[TabulaNul]

This is how I use a midi effect scale :

I use it when I want to play in the right scale without music theory knowledge.

Prevent wrong notes when playing on a keyboard.

• Select from a list of predefined scales (Min/Maj, Ionian, Dorian, Oriental, Persian, Hungarian ...)
• Select Root key (C, C#, D, etc)
• Filter out "wrong" notes that are outside of a scale
• Remap notes to the closest "right" note

Like you say It would sit nicely in the note range and transpose control ! Your selected list of scales in the Zynsequencer is great !

In my DAW, it’s presented this way :

I sometimes use a script, I don’t know if you want to check it, it’s not made by me, I don't know the programming language used.

[jofemodo]

It's kind of javascript.

I also like the idea of implementing this in the zynthian's key-range screen. Ableton UI is really nice and not too difficult to replicate ;-)

But first, we should have this functionality in the zyncore library.