Odd time signatures have always fascinated me. As a guitarist drawn to progressive metal, I spend a lot of time trying to internalize patterns that don't fit neatly into 4/4. 11/4 is particularly tricky—it's long enough to feel disorienting but short enough that you can't just count it out.

The Problem with 11

Most odd times subdivide into comfortable chunks. 7/4 becomes 4+3 or 3+4. 5/4 is just 3+2. But 11 is awkward. You could do 4+4+3, or 3+3+3+2, or 6+5—each feels different, and none feel natural without practice.

I wanted to find phrasing patterns that would help me internalize 11/4 on guitar. Specifically, I wanted:

  • Multiple subdivision approaches to try
  • Accent patterns that emphasize each subdivision
  • Custom annotations I could use while practicing

Using ChatGPT as a Collaborator

This was early 2023, when ChatGPT was still novel. I approached it as a brainstorming partner rather than an authority. The conversation went something like:

"I want to practice 11/4 on guitar. Can you suggest different ways to subdivide 11 beats and describe how each would feel rhythmically?"

What I got back was surprisingly useful. Not because the model "understood" rhythm in any deep way, but because it could systematically enumerate possibilities and describe them in ways that helped me think.

The Subdivisions

We explored several patterns:

  • 4+4+3 — The "almost 12" feel. Two solid phrases, then a truncated third.
  • 3+3+3+2 — Triplet-ish with a short tail. Feels more circular.
  • 5+6 — Asymmetric halves. The 5 rushes into the longer 6.
  • 6+5 — Opposite feel. The 6 establishes, then the 5 compresses.
  • 4+3+4 — Palindromic. Has a nice symmetry to it.

The Annotation System

I asked ChatGPT to help me design a notation for marking these patterns on tablature. We ended up with a simple system:

| 1 2 3 4 | 1 2 3 4 | 1 2 3 |   ← 4+4+3
| 1 2 3 | 1 2 3 | 1 2 3 | 1 2 |   ← 3+3+3+2
| 1 2 3 4 5 | 1 2 3 4 5 6 |       ← 5+6

Simple, but it made a real difference when practicing. Being able to see the groupings while playing helped my hands internalize what my ears were struggling with.

What I Learned

The exercise taught me two things:

First, LLMs are useful collaborators for systematic exploration. They won't have creative insights, but they'll patiently enumerate options and help you organize your thinking.

Second, the value wasn't in finding the "right" subdivision—it was in trying all of them. Each pattern activates different musical instincts. 4+4+3 feels rock-adjacent. 3+3+3+2 feels more jazz or fusion. Knowing multiple approaches means I can match the feel to the context.

This experiment was one of the sparks behind Co-Composer. If exploring odd rhythms through conversation was useful, what about a visual tool that let you build and hear polyrhythmic patterns in real-time?