# Little Phatty & Slim Phatty Forum **URL:** https://forum.moogmusic.com/c/the-moog-forum/little-phatty-slim-phatty-forum/13.md [Latest](https://forum.moogmusic.com/latest.md) · [Categories](https://forum.moogmusic.com/categories.md) · [Tags](https://forum.moogmusic.com/tags.md) --- ## [About the Little Phatty & Slim Phatty Forum category](https://forum.moogmusic.com/t/about-the-little-phatty-slim-phatty-forum-category/15)
**Author:** [@system](https://forum.moogmusic.com/u/system)\ **Replies:** 0\ **Last updated:** [March 29, 2006, 1:27am UTC](https://forum.moogmusic.com/t/about-the-little-phatty-slim-phatty-forum-category/15 "2006-03-29T01:27:17Z")
Everything Phatty. --- ## [Little Phatty LCD screen fading](https://forum.moogmusic.com/t/little-phatty-lcd-screen-fading/36264)
**Author:** [@Progmaster](https://forum.moogmusic.com/u/Progmaster)\ **Replies:** 0\ **Last updated:** [August 2, 2026, 12:22pm UTC](https://forum.moogmusic.com/t/little-phatty-lcd-screen-fading/36264 "2026-08-02T12:22:28Z")
Hi all - the LCD display on my Little Phatty is starting to fade so it’s getting hard to read. Any thoughts about where I can get this fixed? I’m in Gloucester, UK. --- ## [CV in mod for Slim Phatty still available?](https://forum.moogmusic.com/t/cv-in-mod-for-slim-phatty-still-available/36227)
**Author:** [@oortone](https://forum.moogmusic.com/u/oortone)\ **Replies:** 1\ **Last updated:** [July 24, 2026, 10:22am UTC](https://forum.moogmusic.com/t/cv-in-mod-for-slim-phatty-still-available/36227 "2026-07-24T10:22:00Z")
Hello! I read here that there has been a factory modification for the CV input of Slim Phatty (and Little Phatty I guess) so it can be “played” the normal way using 1V/oct. But that post is very old. Anyone heard if th… --- ## [Using a sustain pedal with the little phatty](https://forum.moogmusic.com/t/using-a-sustain-pedal-with-the-little-phatty/36120)
**Author:** [@mozietoes](https://forum.moogmusic.com/u/mozietoes)\ **Replies:** 1\ **Last updated:** [June 23, 2026, 10:13am UTC](https://forum.moogmusic.com/t/using-a-sustain-pedal-with-the-little-phatty/36120 "2026-06-23T10:13:51Z")
Hi all. Can anyone help with using a sustain pedal with the little phatty? I was watching this video https://youtu.be/j-38Rrd9bsQ?si=wFYVHCojryIJSSQk&t=208 And although I have OS3.1 (653), I don’t see the options A… --- ## [Moog Little Phatty needs to be debugged](https://forum.moogmusic.com/t/moog-little-phatty-needs-to-be-debugged/22984)
**Author:** [@Jme\_Nwmn](https://forum.moogmusic.com/u/Jme_Nwmn)\ **Replies:** 2\ **Last updated:** [June 17, 2026, 12:39pm UTC](https://forum.moogmusic.com/t/moog-little-phatty-needs-to-be-debugged/22984 "2026-06-17T12:39:29Z")
Hello friends, I recently acquired a Moog Little Phatty (the original one with the orange LEDs and the wood cheek ends. I’ve dug around on here and done some research and it appears that it needs to be debugged. It’s a… --- ## [WANTED: Stage II Factory presets](https://forum.moogmusic.com/t/wanted-stage-ii-factory-presets/22575)
**Author:** [@Blueberrymusic](https://forum.moogmusic.com/u/Blueberrymusic)\ **Replies:** 2\ **Last updated:** [April 1, 2026, 5:33am UTC](https://forum.moogmusic.com/t/wanted-stage-ii-factory-presets/22575 "2026-04-01T05:33:04Z")
Hey all, Just bought a moog little phatty tribute edition today and am loving it, but wanted to try out all the other factory presets from the Stage I and Stage II. Unfortunately I can’t seem to find the Stage II factor… --- ## [Little Phatty Firmware Update 3.2 Issues](https://forum.moogmusic.com/t/little-phatty-firmware-update-3-2-issues/14556)
**Author:** [@icosa](https://forum.moogmusic.com/u/icosa)\ **Replies:** 24\ **Last updated:** [March 14, 2026, 10:38am UTC](https://forum.moogmusic.com/t/little-phatty-firmware-update-3-2-issues/14556 "2026-03-14T10:38:05Z")
Hey all, Just picked up a Little Phatty and have been enjoying it immensely. It’s the stage 1 version without USB. It currently has firmware 3.1 on it. I went to go and update the firmware with the supplied HEX file for… --- ## [Soil phatty blink issue](https://forum.moogmusic.com/t/soil-phatty-blink-issue/35563)
**Author:** [@lyricpadilla](https://forum.moogmusic.com/u/lyricpadilla)\ **Replies:** 1\ **Last updated:** [February 7, 2026, 7:10am UTC](https://forum.moogmusic.com/t/soil-phatty-blink-issue/35563 "2026-02-07T07:10:13Z")
Anyone have a solve for this? My Slim Phatty just blinks like this when I turn it on and I get no response when holding master or store. There’s also a click noise that correlates to the blink. Can’t even get to a place … --- ## [Slim Phatty - Minitaur - Polychain?](https://forum.moogmusic.com/t/slim-phatty-minitaur-polychain/17330)
**Author:** [@Gametime](https://forum.moogmusic.com/u/Gametime)\ **Replies:** 6\ **Last updated:** [February 5, 2026, 11:28am UTC](https://forum.moogmusic.com/t/slim-phatty-minitaur-polychain/17330 "2026-02-05T11:28:18Z")
Hi , is it possible to polychain this 2 little synths together ? Are there any demo’s ? Can someone confirm this works ? And my last question if it is possible can some one explain how to set it up. :smiley: Thank… --- ## [I would like the factory presets.(LP TRIBUTE EDITION)](https://forum.moogmusic.com/t/i-would-like-the-factory-presets-lp-tribute-edition/22157)
**Author:** [@longsky](https://forum.moogmusic.com/u/longsky)\ **Replies:** 8\ **Last updated:** [January 6, 2026, 10:52pm UTC](https://forum.moogmusic.com/t/i-would-like-the-factory-presets-lp-tribute-edition/22157 "2026-01-06T22:52:06Z")
hello. I own the Little Fatty Tribute Edition. I bought it second hand. I would like the factory presets. I like Special “thanks to Bob.” Factory presets appear to have been posted in the past, but have been removed… --- ## [Slim Phatty pitch bender issues](https://forum.moogmusic.com/t/slim-phatty-pitch-bender-issues/23166)
**Author:** [@mwm](https://forum.moogmusic.com/u/mwm)\ **Replies:** 2\ **Last updated:** [December 4, 2025, 6:55am UTC](https://forum.moogmusic.com/t/slim-phatty-pitch-bender-issues/23166 "2025-12-04T06:55:55Z")
I have 2 Slim Phatties - one responds ok to pitch bend messages, one not - controlled via same midi keyboard. The one with odd pitch bend behaviour: pitch bender upper and lower range do not work on the entire mechanic… --- ## [Little Phatty wheels and plastics issues](https://forum.moogmusic.com/t/little-phatty-wheels-and-plastics-issues/23108)
**Author:** [@victormurphy](https://forum.moogmusic.com/u/victormurphy)\ **Replies:** 2\ **Last updated:** [October 2, 2025, 8:51pm UTC](https://forum.moogmusic.com/t/little-phatty-wheels-and-plastics-issues/23108 "2025-10-02T20:51:36Z")
Hello, I am considering picking up a Little Phatty. it looks like there might be a few issues with the wheels and the keys. Do I understand correctly that there is an outgassing issue with the pitch and mod wheels which… --- ## [Slim Phatty Firmware](https://forum.moogmusic.com/t/slim-phatty-firmware/23255)
**Author:** [@Ococis](https://forum.moogmusic.com/u/Ococis)\ **Replies:** 5\ **Last updated:** [September 21, 2025, 7:32pm UTC](https://forum.moogmusic.com/t/slim-phatty-firmware/23255 "2025-09-21T19:32:49Z")
Hi, Does anyone has any firmware version specifically for the Slim Phatty? I was able to unbrick it but, i found some firmware that keeps the buttons inverted, it is driving me crazy. Any help is appreciated. --- ## [Hex files for LP](https://forum.moogmusic.com/t/hex-files-for-lp/19849)
**Author:** [@alex\_mauillon](https://forum.moogmusic.com/u/alex_mauillon)\ **Replies:** 7\ **Last updated:** [August 14, 2025, 1:29am UTC](https://forum.moogmusic.com/t/hex-files-for-lp/19849 "2025-08-14T01:29:38Z")
Hello! My little Phatty became a brick. I have a problem like on this page http://www.canecreek.co.uk/page12/index.html I have a Debug programmer for jtag. Where can I get the StageData and StageSystem firmware for ins… --- ## [Potentiometer and encoders for sub phatty](https://forum.moogmusic.com/t/potentiometer-and-encoders-for-sub-phatty/23358)
**Author:** [@Philphil82](https://forum.moogmusic.com/u/Philphil82)\ **Replies:** 2\ **Last updated:** [August 11, 2025, 11:47am UTC](https://forum.moogmusic.com/t/potentiometer-and-encoders-for-sub-phatty/23358 "2025-08-11T11:47:47Z")
Hi, Just bought a sub phatty however a few knobs stopped working (octave, headset and some filters). Do you know where I can source these potentiometers and encoders? I found a few but not 100% of the size etc. Thanks… --- ## [Firmware 1.03 and 2.0 etc missing?](https://forum.moogmusic.com/t/firmware-1-03-and-2-0-etc-missing/23165)
**Author:** [@Xaviduch](https://forum.moogmusic.com/u/Xaviduch)\ **Replies:** 1\ **Last updated:** [July 29, 2025, 4:11am UTC](https://forum.moogmusic.com/t/firmware-1-03-and-2-0-etc-missing/23165 "2025-07-29T04:11:35Z")
Hi, I am really surprised because since I upgraded the 1.03 to the 3.21 (I don’t remember exactly the way I did it) my LP is working perfectly except because it doesn’t receive through MIDI IN. I posted an specific pos… --- ## [Moog Little Phatty Stage II Parts / Repair / Service](https://forum.moogmusic.com/t/moog-little-phatty-stage-ii-parts-repair-service/23356)
**Author:** [@POLITEMIKE](https://forum.moogmusic.com/u/POLITEMIKE)\ **Replies:** 0\ **Last updated:** [July 27, 2025, 1:54pm UTC](https://forum.moogmusic.com/t/moog-little-phatty-stage-ii-parts-repair-service/23356 "2025-07-27T13:54:02Z")
I’ve just purchased a second hand Little Phatty Stage II. It needs a little bit of cosmetic love…change of panels, new keybed, new back panel. I’m wondering if there’s anywhere I can get it serviced with these new parts… --- ## [Blank screen all lights on...](https://forum.moogmusic.com/t/blank-screen-all-lights-on/15426)
**Author:** [@montoyadnb](https://forum.moogmusic.com/u/montoyadnb)\ **Replies:** 4\ **Last updated:** [July 16, 2025, 4:13pm UTC](https://forum.moogmusic.com/t/blank-screen-all-lights-on/15426 "2025-07-16T16:13:50Z")
I recently turned on my Sub 37 to find the screen blank and all lights turned on. I attempted to update the firmware, still no change. Please help! --- ## [USB MODULE forever...](https://forum.moogmusic.com/t/usb-module-forever/23168)
**Author:** [@Xaviduch](https://forum.moogmusic.com/u/Xaviduch)\ **Replies:** 1\ **Last updated:** [July 7, 2025, 2:18pm UTC](https://forum.moogmusic.com/t/usb-module-forever/23168 "2025-07-07T14:18:35Z")
Hi, I asked for help about trying to fix the issue with LP stage 1 because it’s not receiving MIDI IN from Cubase or another keyboard. No solutions founded… So I decided to check for myself a way to downgrade the firmw… --- ## [Sub phatty firmware needed ...](https://forum.moogmusic.com/t/sub-phatty-firmware-needed/23293)
**Author:** [@Qooja](https://forum.moogmusic.com/u/Qooja)\ **Replies:** 0\ **Last updated:** [June 8, 2025, 2:31pm UTC](https://forum.moogmusic.com/t/sub-phatty-firmware-needed/23293 "2025-06-08T14:31:55Z")
Hi everyone! Maybe someone has the firmware for sub phatty? Accidentally killed my synthesizer with the wrong firmware… I’d be very grateful! :folded\_hands: --- ## [Slim Phatty Firmware rev:3.11](https://forum.moogmusic.com/t/slim-phatty-firmware-rev-3-11/23261)
**Author:** [@perttumusic](https://forum.moogmusic.com/u/perttumusic)\ **Replies:** 0\ **Last updated:** [May 15, 2025, 6:42pm UTC](https://forum.moogmusic.com/t/slim-phatty-firmware-rev-3-11/23261 "2025-05-15T18:42:42Z")
Hello, i plucked in Slim Phatty analog synth and tried to send mididata from logic.. no response.. i assume i need to instal firmware / driver, but cant find anything from Moog website (except user manual), so annoying … --- ## [Latest USB F/W download link dead](https://forum.moogmusic.com/t/latest-usb-f-w-download-link-dead/20337)
**Author:** [@B.Minor](https://forum.moogmusic.com/u/B.Minor)\ **Replies:** 11\ **Last updated:** [May 13, 2025, 4:19am UTC](https://forum.moogmusic.com/t/latest-usb-f-w-download-link-dead/20337 "2025-05-13T04:19:14Z")
Even after updating my Little Phatty SE II accordingly to the latest OS “V3.21S 691”, I realized that the USB firmware on my LP was still set to “V32” (the LCD menu shows “VERS:3.21 691/32” whereas the two digits after t… --- ## [No Audio from my Slim Phatty](https://forum.moogmusic.com/t/no-audio-from-my-slim-phatty/23214)
**Author:** [@Stani](https://forum.moogmusic.com/u/Stani)\ **Replies:** 0\ **Last updated:** [April 5, 2025, 1:01am UTC](https://forum.moogmusic.com/t/no-audio-from-my-slim-phatty/23214 "2025-04-05T01:01:15Z")
Hi there… I am getting no audio from my slim phatty. It’s connected via a midi cable to my old korg wavestation, I see the a little triangle flash up when ever e hit a key on my keyboard but no sound is coming from the … --- ## [Firmware update OS 1.03 to 3.21](https://forum.moogmusic.com/t/firmware-update-os-1-03-to-3-21/19346)
**Author:** [@art507](https://forum.moogmusic.com/u/art507)\ **Replies:** 25\ **Last updated:** [April 2, 2025, 4:30pm UTC](https://forum.moogmusic.com/t/firmware-update-os-1-03-to-3-21/19346 "2025-04-02T16:30:53Z")
Hi! I just bought a second hand MOOG Little phatty Stage I with the OS 1.03. Could anybody explane me please what is exactly the upgrade procedure? I know that I have to do several upgrades step by step. I would l… --- ## [LP Firmware 3.0 link](https://forum.moogmusic.com/t/lp-firmware-3-0-link/23196)
**Author:** [@AntoineF](https://forum.moogmusic.com/u/AntoineF)\ **Replies:** 1\ **Last updated:** [April 1, 2025, 6:31am UTC](https://forum.moogmusic.com/t/lp-firmware-3-0-link/23196 "2025-04-01T06:31:36Z")
Hi, I would like to upgrade the firmware of my Little Phatty. I have version 2.1 and I would like to upgrade to version 3 but the Moog Music website does not offer the download. Can someone help me or send me the file … --- ## [Little Phatty MIDI DIN version doesn't receive MIDI](https://forum.moogmusic.com/t/little-phatty-midi-din-version-doesnt-receive-midi/23158)
**Author:** [@Xaviduch](https://forum.moogmusic.com/u/Xaviduch)\ **Replies:** 2\ **Last updated:** [February 6, 2025, 9:00am UTC](https://forum.moogmusic.com/t/little-phatty-midi-din-version-doesnt-receive-midi/23158 "2025-02-06T09:00:44Z")
Hello! Well, I suppose I could reopen a thread about it, but I don’t think I’ve read any with the exact same problem. MIDI din version (not usb) issue: Little Phatty does not receive midi. I have had my Little Ph… --- ## [Slim Phatty Problem - Midi](https://forum.moogmusic.com/t/slim-phatty-problem-midi/9173)
**Author:** [@rager8](https://forum.moogmusic.com/u/rager8)\ **Replies:** 40\ **Last updated:** [January 30, 2025, 8:23pm UTC](https://forum.moogmusic.com/t/slim-phatty-problem-midi/9173 "2025-01-30T20:23:15Z")
Hey all, I just got this slim phatty a couple days ago and you can imagine my reaction when it just started having issues a few hours ago. The module will not play notes from the keyboard: I double checked the midi c… --- ## [Little Phatty Stage II – Preset Transfer Gone Wrong - Need Help!](https://forum.moogmusic.com/t/little-phatty-stage-ii-preset-transfer-gone-wrong-need-help/23150)
**Author:** [@sonashi](https://forum.moogmusic.com/u/sonashi)\ **Replies:** 0\ **Last updated:** [January 30, 2025, 1:56pm UTC](https://forum.moogmusic.com/t/little-phatty-stage-ii-preset-transfer-gone-wrong-need-help/23150 "2025-01-30T13:56:50Z")
Hey all, Hoping someone can help! I sent a new preset bank (official Moog percussion presets) to my Little Phatty Stage II via USB, and it completely freaked out. Now: USB MIDI doesn’t work on my new Mac (but does on … --- ## [Post Your Phatty Tribute Number!](https://forum.moogmusic.com/t/post-your-phatty-tribute-number/2857)
**Author:** [@soundengine](https://forum.moogmusic.com/u/soundengine)\ **Replies:** 290\ **Last updated:** [January 17, 2025, 8:12pm UTC](https://forum.moogmusic.com/t/post-your-phatty-tribute-number/2857 "2025-01-17T20:12:40Z")
Whilst I await for my LP to arrive, I thought it would be fun for everyone to just simply post their LP number, and where they are located. for example, mine would be: 1200(or something like that since its taking forev… --- ## [LP Stage II and Tribute Edition patches compatibility](https://forum.moogmusic.com/t/lp-stage-ii-and-tribute-edition-patches-compatibility/23138)
**Author:** [@art507](https://forum.moogmusic.com/u/art507)\ **Replies:** 1\ **Last updated:** [January 14, 2025, 9:47pm UTC](https://forum.moogmusic.com/t/lp-stage-ii-and-tribute-edition-patches-compatibility/23138 "2025-01-14T21:47:30Z")
Hello! Does anyone know if the presets created on LP Stage II (latest firmware installed) are compatible with the Tribute Edition? Thanks. [Next page](https://forum.moogmusic.com/c/the-moog-forum/little-phatty-slim-phatty-forum/13.md?page=1)