Tanstaafl

oooooo, they're purdeee !! :)

looks good to me

Yeah, i had that schematic... somewhere on my hard drive, and had been looking for it. Forgot it was Magnus's. Thanx for the reminder/location link. gb

DONE !!!! 2 cores - encoding of old 3 octave keyboard and knob events for my software synths, forwarding of keyboard midi events. 1 core - MidiBoxCV for controlling my analog (Volt/Octave) gear. all wrapped up in a (not so great looking) box. ;D oh, one last thing to do. Make another AOUT board and configure it for my Volt/Hz gear. Not really sure about this bit, but will do some research.... Lin/Expo converter or somesuch maybe. so i guess the block diagram was correct, except for the DOUT module, didn't need to scan the matrix since DINX4 worked for individual key closures. I'll post pictures later this week. Thanx for all the help MidiBoxers !!!! ur the greatest ! gb

EUREKA !!! used SysexBox18f and everything went perfectly!!!! now that I think about it... that was what i ended up doing the last time.... must put a post-it note on the outside of my midibox binder.. :) happy midiboxing!!! gb

nope, oh well, gonna keep beating on it ;) might start from scratch again on this core project. I'll keep you posted. have a GREAT DAY!! gb

oh!! i missed the -os_upload. lemme try that real quick gb

yes to the command line switch. this is so strange... i've done this before and it worked... i have another '452 getting ready to burn it and see what happens. isn't it about midnight over there? do you ever sleep? :) thanx for the help TK ! gb

I know I must be doing something wrong.... i'm attempting to add a 3rd core to my system (at id 0x02, next in line) and cannot seem to upload MIOS after burning this with any other ID but 0x00. I've tried both the IC-Prog and change-id methods. strange... the first 2 cores had no problem with variant ID's. I think I have burned the instructions from all the online resources into my pea sized brain, but am not having any luck. Symtoms: ic-prog method: open bootsrap loader file; change id number (down in right corner) to '2'; burn chip. after this I can not upload anything via midi to the core. the core sends the correct request to upload sysex message with '02' in the ID field (3rd from end, i think), but nothing uploads, core continually sends request to upload. change-id method: burn functional bootstrap loader file(set to ID 0x00); there are variations I have tried after this point. 1. load MIOS 1.8 rc1, get 'ready' display; assemble change-id.asm with ID number at 0x02(or any other number for that matter), convert with hex2pl.....; upload new sysex file to core. system reboots and says 'ID Change 000000000....02'; Core never does anything else... just displays same message, even after reboot. 2. upload change-id sysex file immediatly after burning bootstrap loader(functional as above); this does not appear to do anything. I gotta be missing something obvious again :'(. as always, any assistance will guarantee another star in your Karma Crown ;D thanx, gb

Thanx for the reply TK! Not sure i want to reinvent the wheel with this project.... so i think i will go for the 3 core option.... :) BTW.... great job with the AOUT board! it tracks my PAIA Midi2CV8 perfectly.... now on another note. How about some code that makes MidiCV volt/hz? I have a bunch of exponential gear I would like to control along with linear stuff. I have looked through the code.. but am not an ASM person, trying to locate the conversion values. should / can this be done programatically? or can the exponential response be obtained by changing Rx/Ry/Rp values? thanx in advance and have a GREAT DAY!!! gb

I have had a thread over in the Design Concepts area regarding the following: I have an old Paia keyboard I wanted to interface to midibox. (switch contacts only). I wanted this to drive a dual midibox project I have already built (MoogModular MidiBox). And I wanted to be able to use the keyboard for other midi instruments (softsynths, midi enabled DIY modular analog gear). the above was accomplished yesterday!!! Next, I want to hook an AOUT board to this setup and be able to control analog gear directly. (non midified modular analog gear). My question/dilema is... how do I include the code for MidiBoxCV into my Midibox64 system? Do i recompile MIOS with MidiBoxCV included?... OR... since I am only using 2 cores now... do I add MidiBoxCV to a third core and use MidiLink? (presumably this would be the easiest, but I would like to utilize the spare functions from my exsisting cores) Comments? Clarifications? Thanx in advance and have a Happy New Year !!! gb

! ok, all steps except for CV done! i had not used any of the buttons on my MoogModular MidiBox, so had more than enough for the 37 key Paia keyboard. worx fine! controlls softsynths and outputs key data to other midi boxes. guess I'll need to move to the programming thread now for the rest of the box. i will post pix in the next couple of days. gb

yep... looks like the dxin from keyboard contacts solves that problem.... getting midi data from keys pressed. now... to get aout/CV working.... hmmmm gb

Ok, so maybe i'm asking the question incorrrrrrectly. I see in the midibox64.ini file, that the last 40-50 buttons are actualy midi note on events with note numbers. is it feasible to directly hook up the keyboard contacts to these dxin connections to get midi note data? if not,... does the 8x8 matrix .. do this? I would still want to have the ain 64 pots so I could use this setup as a controller for midi and eventually drive the analog CV board (aout). Am I being a bit too ambitious for one core module? thanks gb

p.s. something along the lines of this (hardware wise)

Howdy MidiBoxers !! I have a new project to put some old odds and ends together into a working controller / keyboard. What I have is an old PAIA 37 key keyboard from the 70's. I want to scan the switch closure (5 rows x 8 cols) matrix with some combination of core / dxin4 . I also want this to output the midi data for keyboard info... so the keyboard can output standard midi data to a rack synth. Next , I am also wanting to control some DIY analog synths from this thing. So I guess an AOUT So, I have all of these things, just wondering where to start with programming all this stuff to work together? thanx in advance gb

duhhhh silly me. i've done this with TTL / MML on my paia and DIY stuff, just wasn't thinking. thanx moebius. gb

thanx moebius! one more silly question..... will J5 directly drive the gates... or should i build a buffer type circuit... ala the resistor/transistor network on the AOUT module? anyway... thanx again gb

been working on the MB CV for a few days now and am ready to lay it down on copper. however, i am a bit confused about something. (probably missing something obvious) the AOUT module page states "The AOUT module provides 8 control voltage (CV) outputs with 12 bit resolution and 2 gate outputs", but the MB CV page states "# 8 CV outputs with 12 bit resolution# 10 gate outputs". where would i find the other 8 gate outputs? or am i overlooking something? thanx in advance MB GURUs ! gb

not if the scope is set for 2.5V / division. smash: looks good to me :)

digit ( al )

y'know... i never realized midio128 could be used to encode a keyboard..... i have a couple of old paia keyboards i have wanted to encode... and have done some with diy matrix scanner but never really been satisfied with the performance/programmability.... dag nabbit, now i gotta start another midibox project...still in the middle of a Logic controller... oh well.... never boring around midibox.org :) gb

Thank you , thank you... d2k... yeah the keyboard is velocity sensitive.. it's the guts and kbd from an old ' cambridge piano learning system ' the original case was way too big to fit on my stand so I made an oak and mahogany surround for it ( i dabble in wood working also... guess most of us here do at one time or another). justin, :-/ i cleaned up the place for an hour before i took the pix.... ;) gb

Howdy Shed, I have the 2 x 2 midiman and am very happy with it, i think they make good stuff. (also have the 1 x 1 aka 'usb keystation 49', and it works fine) good luck! gb

Thanks TK and pay_c !! ;D Yeah, the pix are low res because of bandwidth, I do have the originals (approx 1 - 2 megs each. I will put them up today (links only) next to the web based ones. gb