Pitfalls

Pitfalls

microtonal scale explorer / chord arpeggiator / isomorphic grid keyboard

Firstly many thanks to inspiration from Stephen Weigel, Sevish, Erv Wilson, and other explorers of microtonal/xenharmonic scales.

item: There are pitfalls in using equal division within which
         to calculate 2-interval-patterns which the unwary traveler
         will most certainly fall into.
                                                                              - Erv Wilson [0]

I’ve invested several weeks encoding some of my naïve interpretations into Pitfalls - a norns library for exploring microtonal scales and chords.

If there’s interest I can hone pitfalls into a library for reuse - anywhere microtonal scale pitches are desired.

Already there are some concepts forming:

scale = Scale:new(2, 1, "LLsLLLs")
scale:set_mode(2)
intervals = ScaleIntervals:new(scale)
pitches = Pitches:new(scale, intervals, tuning = 432, midi_start = 60)

Requirements

  • norns
  • optional:
    • grid (64 or 128 varibright)
    • or midigrid (see edit settings to change grid lib)

Documentation

Explore & play your own microtonal scales.

Set interval structure as a sequence of large L and small s steps.

For example, C Major diatonic scale:

   LLsLLLs  L: 2  s: 1  base: C

A 19 EDO, 7 note scale:

   LLsLLLs  L: 3  s: 2

Toggle note/chord arpeggiator to hear scales.

Optionally play scale via grid as a isomorphic keyboard.

Controls:

-- E1 change cutoff filter
-- E2 change value
-- E3 select step or parameter to change
-- K1 
-- K2 toggle arpeggiator
-- K3 

Download

Available on maiden, or:

pitfalls v0.1.0 einfach einem

pitfalls v0.2.0 fuoco fawkes

  • in progress
  • may add monophonic pitch-bend live retuning
    • to play microtonal scale pitches on external synths via MIDI

Source

References

[0] An Introduction to the Moments of Symmetry

46 Likes

microtones!!! this looks like an amazing way to start reprogramming my brain. can’t wait to try.

1 Like

enjoy! I learnt a lot about structuring Lua from reading your arcologies sourcecode!

1 Like

Interesting - I was just discussing microtonal electronic instruments with someone and Pitfalls appeared…

By the way, anyone who is wondering how to add midigrid to this script just needs redacted (EDIT: ignore me, because @delineator cleverly allowed for midigrid already!)

Any chance we can begin to potentially add crow to this as well? Analog oscillators could match beautifully with this!

3 Likes

Actually you don’t need to alter the pitfalls sourcecode to use midigrid.

Instead I’ve added a grid_lib parameter.

You can change the grid_lib parameter option, and save a default PSET file like so:

K1 -> E1 right -> Parameters EDIT -> PITFALLS -> grid_lib -> choose between grid, midigrid/lib/midigrid, and midigrid/lib/mg_128

K2 -> PSET -> SAVE -> OK

2 Likes

Fantastic! That’s really great and I can confirm it works with mg_128. Nice!

I don’t have a crow setup myself. I could take a peek at other libraries to see what’s required code-wise.

1 Like