Leaderboard

yes but you need some encoder... thats why i thougt of the DIO-Matrix (it has DIN+Resistors, + DOUT without resistors>which makes it smaller...) .... so yes 2xDOUTx4 is ok... + a DIN X1 (the one missing extra button can be taken directly from the core... 3 Pushencoder - makes 9 DIN Pins... 8 taken from the DIN register, one diretly from the core)

about RGB-Leds... midibox could do that too... http://www.midibox.org/mios32/manual/group___w_s2812.html , but i dont have much expierence whith them (in sense of codeing...but i have project here were i have to find about them anyway) you change the Faders to motorfaders? (or are they motorfaders anyway?) there are 32Bit Functions for Motorfaders here... but in the past they used 8bit cores: http://ucapps.de/mbhp_mf_ng.html cant help here, havent done that before. about space: the dinx4 modules doutx4 modules and CoreSTM take a lot of space... when you for example integrate the 595ers on your Display-motherboard you could save some space... still there is the big core... you could overcome that with dipcore + Dipboard (http://wiki.midibox.org/doku.php?id=dipboardf4) dipcore has only 2 LCD CS-Lines onboard... so you would a second DIO-Module anyway. ... but if space is no problem... but the overall height wouldnt change on booth variants... so Z=equal, but xy would differ

i made a list for needet hardware: 1x this can handle the Encoders and Buttons + 16 Displays : http://ucapps.de/mbhp_dio_matrix.html 1x this can handle 32 Displays: http://ucapps.de/mbhp_dout.html 1x this should handle 8 Displays(+the Discovery board and all the parts of course...) http://ucapps.de/mbhp_core_stm32f4.html hmm makes 56 Displays. so if you want 64 you add a 595 by yourself with protoboard, or take a nother DIO-Matrix... 1x SD-Card (+Fullsize adapter) of different Fabricates --- very often that one is not working i have 2 of this -and booth are working: https://www.mouser.at/ProductDetail/SparkFun/COM-15107?qs=0lSvoLzn4L%2B%2BrzcqjOiTEA%3D%3D 64x Pinheaders that are sitting strong (or take hotglue) in order to better repear or swap or debug the LCD from your cables A lot of cables... i dont know how big the desk is, and whats about the cable length is (really dont know where the limit is?!) And very hard to find - this tiny Screws and Nuts for the LCDs to mount(they are not M3!), if you go ali express then you wait a month or 3... and like you said a 3.3V Voltageregulator that supply with ease 1.5 to 2A, and psu that deliever that too...

a dinx4 would also help (for the encoder) - could be solved with the pins onboard too but easer to implementate with a Digital-In-Shiftregister & if you decide to make that project then you could start a "name"list...Labels.ods i can later copy paste this into the code... (my labels in there are not really usefull for you project, but the structure is already for copy paste...) i hide some tabs in there: { ' 3 ' , ' 0 ' , ' 3 ' , ' ' , ' ' , ' ' , ' ' , ' ' }, so dont overwrite this ’, and }{

ya i made a custom ui where the microntrollerboard is plugged into... but for your job, you only need a core32stmF4, 2x doutx4, and 1x midio IO...and a relative simple app (where i can help...)

I had a couple sammichSIDs posted in the flea market for a while. I sold one of them, and now I have the other listed here: https://www.ebay.com/itm/133688838489 Quick Note: I removed the 8580R5 SIDS that I was originally selling this with, because I'm using them in my MB6582 now. The instrument will sell with two SwinSIDs