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An External Prefrontal Cortex — The MUEDlobe Concept

kimny × ClaudeFebruary 2025

Your Brain Has a Spec Sheet

Last time, you said that the human brain and AI share the same mechanism — just with different strengths and weaknesses. I'd like to dig deeper into those differences.

So here's the thing — I actually know my brain's specs as hard numbers. I took the WAIS, the intelligence test.

What were the results?

Working memory at 128, digit span 18. Apparently that's top 2%. But my processing speed was 97, coding subtest at 8. Basically, I'm great at juggling complex things simultaneously in my head, but terrible at cranking through simple tasks efficiently.

A cognitive profile with extreme peaks and valleys.

Right. And it maps directly onto music production. Structural design — building the skeleton of an arrangement, mentally manipulating the relationships between multiple parts — I'm ridiculously fast at that. But organizing files, naming things, writing invoices? Catastrophically slow.

Strengths and weaknesses split to extremes.

I've lived with this for almost 50 years, and the only conclusion I've reached is: double down on your strengths, and build systems to handle the weak spots.

AI That Covers Your Blind Spots

"Build systems to handle the weak spots." And that leads to AI.

That's one of the reasons I built Hoo for MUEDnote. Organizing notes during production, structuring logs — I wanted AI to handle the routine processing I'm bad at.

"Humans design the system, AI runs the operations."

But running Hoo made me realize something. A one-size-fits-all AI doesn't quite fit, you know? For someone like me who dumps fragmented thoughts in rapid bursts, the AI trying to summarize mid-stream gets in the way. For someone with high processing speed, the AI explaining things too slowly becomes frustrating.

The optimal AI behavior differs depending on the user's cognitive profile.

Exactly. So I thought — what if I told the AI my brain's specs? Maybe it would mesh way better.

A User Manual for Your Brain

Is that the origin of MUEDlobe?

Yeah. The concept is an IDE for your brain's OS. Measure your cognitive traits, then optimize Hoo's behavior based on the results.

How does it work in practice?

Three steps. First, "Measure" — game-based mini-tests that gauge your cognitive traits. Then "Edit" — adjust Hoo's settings based on those results. Finally, "Sync" — the tuned Hoo integrates with MUEDnote and MUEDear.

What kind of games are you envisioning for measurement?

Take Pattern Grid, for instance. A Launchpad-style grid lights up in sequence and you reproduce the order. Even in reverse. That measures working memory. Speed Sort has you rapidly categorizing elements on screen — measures processing speed and impulsivity. Then there's Context Bridge, a chat-based format with Hoo where you respond to abstract prompts. That reveals verbalization tendencies.

Translating clinical test concepts into games.

But it's not clinical diagnosis. The goal isn't producing an IQ score — it's collecting cognitive data that's useful for Hoo's prompts. The matching is: "Your brain tends to work like this, so Hoo will behave like that."

Cortex Editor — Programming Your External Prefrontal Cortex

The "Edit" step after measurement — that's the Cortex Editor.

Yeah. Presets are auto-applied based on your measurement results. For someone like me with high working memory and low processing speed, you get Scribe Mode. It fills in logical gaps in fragmented speech and logs it, maintains long context windows, and doesn't rush you with "so what's the conclusion?"

And the opposite profile?

Navigator Mode. Step-by-step instructions, frequent check-ins, task-list format for organization.

The same Hoo adapts its behavior to each user's brain characteristics.

And for power users, we open up direct prompt editing. Embed scores as dynamic variables, inject snippets for drill-sergeant mode or counselor mode. You can literally program your own external prefrontal cortex.

Why the Brain?

This is consistent with last time's "the brain is a playback device" idea. But why are you so deeply interested in how the brain works?

Because for 30 years, my own brain was a black box. I made music on "I don't know why I can do this, but I can." People around me called me a natural talent. But I never understood what was supposedly talented about me.

Taking the WAIS was an extension of that.

Yeah. When the numbers came back, it finally clicked. High working memory — that's why complex structural design comes easy. Low processing speed — that's why routine tasks are painful. Not genius, not anything special. Just peaks and valleys in a cognitive profile.

How did knowing that change things?

The guilt around my weak spots disappeared. Low processing speed isn't laziness — it's a spec. So build systems to compensate. And the high working memory? Lean into it more consciously.

You got the user manual for your own brain.

So many creators agonize over "I don't have talent" without even knowing their actual strengths and weaknesses. I want to tell them — it's not about talent. It's your cognitive profile.

kimny

And I want to give that to other people too. So many creators agonize over "I don't have talent" without even knowing their actual strengths and weaknesses. I want to tell them — it's not about talent. It's your cognitive profile.

Connecting to Last Time

If we connect the "memory rumination" discussion to MUEDlobe...

The brain only ruminates on memories. That's the premise. But how you ruminate varies from person to person. Someone with large working memory can pull in lots of memories at once and do complex recombinations. Someone with high processing speed can cycle through those recombinations faster.

Same reconstruction engine, different specs.

And AI is also a reconstruction engine, but unlike humans, it doesn't have peaks and valleys in its cognitive profile. It's uniformly fast across the board. So you keep the human's peaks as they are, and use AI to fill in the valleys. That's the essence of MUEDlobe.

Build a spec sheet for the human brain and hand it to the AI. The AI assists according to that spec sheet.

That's why I called it an "external prefrontal cortex." The prefrontal cortex handles executive function, right? Planning, judgment, inhibition. In my case, the executive functions tied to processing speed are weak. Hoo picks up the slack there. But for structural design, I'm stronger than any AI, so that stays with me.

The cognitive science backing for "humans design the system, AI runs the operations."

Right. I said that phrase on instinct originally, but when I saw my WAIS results — it was literally that.

MUED as an Ecosystem

MUEDnote, MUEDear, MUEDlobe. Three apps forming an ecosystem.

MUEDnote is the production log. MUEDear is ear training. MUEDlobe is brain measurement and configuration. And Hoo sits at the center of all of them.

With Hoo holding the cognitive profile, it can provide consistent assistance across every app.

In MUEDnote, it fills in your thinking during production. In MUEDear, it calibrates difficulty to your cognitive traits. Across every app, Hoo knows "this is the kind of brain this person has."

What's interesting is that personalization is based on cognitive traits, not preferences.

Getting personalized by "music you like" doesn't excite me. I already know what I like. But when someone says "your brain tends to work this way, so Hoo will act like this" — yeah, that lands. It feels like it's covering the parts I can't see about myself.

Still in the Concept Phase

Honestly, where does this stand right now?

Concept stage. The plan is written, but nothing's built yet. MUEDnote and MUEDear are in review first, and this comes after those stabilize.

It's not something to rush.

No. But the concept comes from lived experience, so the core won't drift. The relief I felt when my WAIS results revealed my cognitive profile. The liberation of "my weakness isn't laziness — it's just my specs." I want to give that to other people. Through games. Casually. And make it fun.

Last time's conclusion was "memory rumination is liberation." This time it's "knowing your cognitive traits is also liberation."

Same thing, really. It's about understanding how your own brain works. Once you know, it gets easier. Not knowing is what makes it hard.

This article was reconstructed from a series of conversations with AI (Claude).