Marbles

#219

It can happen that you think your oscillator is tuned to the correct scale, because some notes of the scale would overlap with the scale you think you set. With more notes appearing you might notice it’s not the correct scale but interpret it as “Marbles switched scales somehow”.

a) Tune your oscillator to the desired root note, after that connect with Marbles’ x out.

b) Connect Marbles’ x out to your osc. Set Steps fully CW (so only the root note and octaves will we played), set Spread to CW or CCW (so the notes won’t change on the output). Set x-Bias to CCW or whatever position you feel comfortable tuning your oscillator with.

Tuning your oscillator will determine the root note. The respective scale is set via longpress Output Range.

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#220

I use the “J5” mode audio recorder of the expert sleepers disting for that. Although it’s supposed to be an audio recorder, it also records and plays back recorded control voltages very well. In addition, when using other modes to playback the recorder control voltages you can do many more things: reversing them, control the speed of playback back etc…

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#221

Does anyone have any thoughts on reducing density output of the “Grids” mode? I like how it works now, but I wish I could change “Fill” somehow how to get less triggers while making sure it still sounds familiar.

#222

If you’re speaking specifically about gates, one possible way of “thinning” is to send to one side of Branches with nothing on the other side and adjust the pot or use a CV to achieve a desired probability, though it WILL be random, and that might not suit your needs…

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#223

id approach this by using an eigth note clock source and an AND gate.
would probably filter out some of the faster sixteenth fills. experiment with clock source frequency or use a trigger sequencer instead of a clock

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#224

Help me wrap my head around this. Marbles’ minor scale seems to contain a major sixth above the root instead of a minor sixth (A instead of Ab with an oscillator tuned to 0V=C). I’ve reset the scale according to the instructions in the manual just to make sure, although I don’t remember ever replacing it, but it’s still the same.

Makes me wonder if I’m making a very obvious mistake here. :slight_smile:

Of course, even with this major sixth I can get it to play correctly in any minor scale by simply tuning my oscillator one fifth below the root of the scale I want (e.g., tune to F for F-G-Ab-Bb-C-D-Eb, i.e. C minor), so it’s not a big problem.

My Marbles' minor mode is actually dorian :thinking:
#225

You could also use a precision adder to shift the scale to any other key.
If your minor scale has an A natural it’s tuned to the dorian mode, so it would make sense that tuning a fifth up sounds right.

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#226

Dorian, exactly!

It’s easy enough to turn it into a natural minor with a precision adder, as you said, or by retuning the oscillator. I just thought it was a little unexpected, given the term “Minor” in the manual, which suggests aeolian mode. Anyone else hearing this with their Marbles?

Edit: this is with the Steps knob at 2 o’clock. The Major scale does sound as expected.

Looking at the minor scale in Marbles’ code, I see that the relative importance of G# is 96 and that of A is 16. So moving the steps knob from 1 to 2 o’clock, A should disappear before G#/Ab does, to go from chromatic to natural minor… but that’s not what I’m hearing. Weird.

#227

If you’re not in a hurry, I can check how it works on mine, but not before next weekend unfortunately

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#228

Thanks! No hurry at all, just curious. :slight_smile: In fact, I think I’ll start a separate thread for this as my case seems unusual, since the code looks correct.

#229

This is a bug (well a data bug) that has been fixed in the most recent batch of modules (and firmware 1.1)

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#230

Thank you, Émilie (I’m relieved it wasn’t my ears playing tricks). I’ll upgrade to 1.1 then!

#231

Lord knows i was confused why i always had to play with bias to get minor scale melodies :stuck_out_tongue:

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#232

Another inqury. As I’m finding a place for Marbles in my performance patch, I end up needing to catch the correct kick drum trigger to reset my other modules to get everything to sync to Marbles’ Grids mode. It’s not fool proof, but I can usually get it within a couple tries. I was wondering if anyone who has looked over the Marbles source code knows whether it would be possible to decouple the Rate or Jitter CV input to repurpose as a Reset while in Grids mode? :thinking:

#233

Quick question about upgrading to firmware 1.1. After upgrading will I need to calibrate?

#234

God no!

#235

Great. I didn’t think so, but sometimes firmware updates require a recalibration, so just wanted to double check.

Marbles is the core of my small eurorack setup, and actually made it possible, as I wanted to keep things to a 104HP skiff, so thanks for creating it and allowing me to build the instrument I’ve always wanted.

#236

A firmware update will require a re-calibration when the new firmware uses a different format for storing settings, and the old calibration data is thus no longer readable. I never change this aspect with my own firmware updates.

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#237

That’s great to know, and removes the worry with doing firmware updates with your modules.

#238

As a fellow fan of Marbles who recently put together a skiff including it for a trip, I’d love to see what’s in your 104hp setup.