I agree about filter. That’s why I left this idea aside.
Much more interesting would be to mess with the digital nature of the synth
That’s beyond my skill set 
the front is aluminium ?
tx81 front panel is aluminum
Good job! It looks awesome. Would you please let me know what is the exact model of the display you have used? I found a LCD for my DX21 but as you correctly mentioned, it causes noise on output sound. I am desperately searching to find any working LCD for my gear. The original one is completely toast and doesn’t show anything.
Thanks
to be honest with you i can’t remember. it was long time ago. my best guess it was made by midas as i was using them at the time. from my later experience winstar modules were in most cases noise free. the exception was 16x1 in dx100. however winstar 16x2 was noise free in dx100.
i have recently used/tested sureno modules (available on aliexpress) and despite they are sometimes noisy, noise goes away when adding a high impedance resistor in parallel with one of the capacitors on oled pcb.
sorry i can’t give you any details you asked for but i hope the above will help you a bit.
edit: i have re read my earlier posts and i was correct in saying it was midas module.
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