Home › Forums › Products › Stompboxes › Going Microtonal on h90
- This topic has 5 replies, 3 voices, and was last updated 1 week, 6 days ago by
TOTAL.
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March 5, 2026 at 12:25 pm #194856
Is it possible at all?
That would be my main addition to the wishlist. -
March 6, 2026 at 9:19 am #194862
Not with a Scala or MTS-type of overlay, but you can, in a more limited sense. The default PolyFlex Program is a good template as a starting point.
Manual Flex A & Manual Flex B are mapped to EXP1. Use the dropdown menu to change that to Preset HotKnob.

From there, change the the Mix to 100, with Auto Engage being an option. Your base tones (Shift A & B) at Unison. Both Flex A & B to +m2 or -m2, depending on the direction you want to achieve. From there, adjust the Preset [A] HotKnob for the depth of microtonal detuning. The image shows both voices up an eighth-tone.
At that point, you can leave it as shifted, bend up an 1/8th with a Dual Flex performance switch, or remap to expression pedal to introduce ‘blue note’ bends. With a couple more quick tweaks (Mix = 50 and Flex B opposite of Flex A), it transforms into a finely-adjustable dual detuner.

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March 6, 2026 at 9:20 am #194863
Can you be more specific?
The Harmonizer and pitch shifting algorithms are quantized to 12-ET. However, certain algorithms will allow you to adjust by cents.
More information for what you’re looking for would be helpful for answering your question.
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March 7, 2026 at 3:23 am #194876
For the first time realizing that sometimes it is individual notes rather the all the octave tones that don’t sound quite right.
My groovebox allows automating micro pitch shifts per event so I’m not out of options, but having this preconfuricurable by the first effect of h90 would open new possibilities to better sounding improvisations.
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March 7, 2026 at 3:30 am #194877
brock, thanks for your reply. I intuit that your solution adds pitch shifting as a manual or semi-manual detune layer, not a note-aware microtonal system?
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March 7, 2026 at 3:38 am #194878
As I think further, what I am looking for would only fully work if at the level of synth, where every note in a chord informs sound creation.
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