# Creating a cheaper MIDI Analyzer

**URL:** <https://lookmumnocomputer.discourse.group/t/creating-a-cheaper-midi-analyzer/7892>\
**Category:** DIY STUFF\
**Created:** [June 4, 2025, 4:50pm UTC](https://lookmumnocomputer.discourse.group/t/creating-a-cheaper-midi-analyzer/7892 "2025-06-04T16:50:04Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![craigyb](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/craigyb/32/21602_2.png) [@craigyb](https://lookmumnocomputer.discourse.group/u/craigyb)\
**Post date:** [June 4, 2025, 4:50pm UTC](https://lookmumnocomputer.discourse.group/t/creating-a-cheaper-midi-analyzer/7892/1 "2025-06-04T16:50:04Z")

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Based on the previous design that used a Teensy 4.0

[![](https://global.discourse-cdn.com/free1/uploads/lookmumnocomputer/original/3X/d/b/db7ae05c4617356eb6a300c73ad0a669f33db54b.jpeg "MIDI Analyzer, a cheaper version") ](https://www.youtube.com/watch?v=chNPQs3ckSo)

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**Author:** ![craigyb](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/craigyb/32/21602_2.png) [@craigyb](https://lookmumnocomputer.discourse.group/u/craigyb)\
**Post date:** [June 5, 2025, 2:40pm UTC](https://lookmumnocomputer.discourse.group/t/creating-a-cheaper-midi-analyzer/7892/2 "2025-06-05T14:40:47Z")

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The finished version before casing it up, added USB MIDI and fixed the EEPROM section to store filters.

[![](https://global.discourse-cdn.com/free1/uploads/lookmumnocomputer/original/3X/b/c/bc780f4e10f3115944c0f87b03f32d50c5a7450f.jpeg "Final version of the new Pico based MIDI Analyzer and filter") ](https://www.youtube.com/watch?v=LInYfgomll8)

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**Author:** ![craigyb](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/craigyb/32/21602_2.png) [@craigyb](https://lookmumnocomputer.discourse.group/u/craigyb)\
**Post date:** [June 6, 2025, 4:59pm UTC](https://lookmumnocomputer.discourse.group/t/creating-a-cheaper-midi-analyzer/7892/3 "2025-06-06T16:59:29Z")

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Finally cased it today and decided that the NEOPixel leds are nicely filtered by the glossy laminated paper.

[![](https://global.discourse-cdn.com/free1/uploads/lookmumnocomputer/original/3X/b/0/b0b0cede5717456dfda9b486b5bc85f10e937d6d.jpeg "RP2040 based MIDI Analyzer filter in its case.") ](https://www.youtube.com/watch?v=NrIv72pcqZI)

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**Author:** ![antoine.pasde2](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/antoine.pasde2/32/326_2.png) [@antoine.pasde2](https://lookmumnocomputer.discourse.group/u/antoine.pasde2)\
**Post date:** [June 12, 2025, 2:55am UTC](https://lookmumnocomputer.discourse.group/t/creating-a-cheaper-midi-analyzer/7892/4 "2025-06-12T02:55:23Z")

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Nice finished product.  
The Error indication LED flashes quite a bit, what causes that?

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**Author:** ![craigyb](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/craigyb/32/21602_2.png) [@craigyb](https://lookmumnocomputer.discourse.group/u/craigyb)\
**Post date:** [June 12, 2025, 4:33am UTC](https://lookmumnocomputer.discourse.group/t/creating-a-cheaper-midi-analyzer/7892/5 "2025-06-12T04:33:22Z")

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No that’s just an optical illusion, the error led is red obviously, but that’s just the midi activity led (blue) playing tricks on the camera.