Just Phil

are you trying to emulate "Polyphonic Pressure", or "Polyphonic Aftertouch", or just "Aftertouch"? There is some confusion relating to the term pressure sensitive, with some using it as a synonym for velocity sensitive. To avoid this confusion, pressure sensitivity is sometimes called aftertouch. Both velocity and (true) pressure sensitivity are supported independently by the MIDI standard. Many keyboards already have this implemented...

fak beat me to it.. he also plugs midibox.org in the vid 8)

thats what i was going to do... gonna order one instead and see what happens

can anyone direct me to where i shoudl be reading about this?

interested in next order

thats them plan... but there is alot of LOST information on these boards... and unless somethign makes it to the WIKI dont blame me if i ask a question about it.... I do search the forums... but EVERY RESPONSE i read on these topics is always a THEORY or untested issue... i plan on ordering parts for teh board in early '08 so i'd like to have my research done by then.... my problem is my inablity to really express what i'm asking over the internet... i work much better with people... of course i dont know anyone doing this and especially what i've been planning... can anyone suggest any links, or manufacturers to steer me in the right direction? i need MULTIPLE (12-16), x/y touch input devices (communicating via any protocoll neccessary) that output a MIDI signal to a pc, and eventually a display with a general point of where the device is currently at... while trying to avoid joysticks..... (the software will further modify the midi signal and i would like that placement of the x/y displayed)

because i need between 12-16 each of them mapped to their own parameters... and i need them available on the fly... i cant be switching between modes, banks etc... the visual feedback doesn't need to be precice.. i'm just looking at all my options... like i said in the other thread if i HAVE to i will buy 16 korg kp3's but i'd rather try to implement my own way with my own basic graphics..... if anyone has and advice on how i can do this please let me know...

Audiocommander, first of all my box needs approximately 16 x/y interfaces (between 12-16 budget will dictate), where i'm really staying away from joysticks for because of the the functions they will be controlling. i also need visual feedback of where the pointer is at any point... i will stop at NOTHIGN to make it happen, if necessary i will HIRE a programmer to make it work. But i'd prefer to learn to code/program, (no more then 2 languages or i may go insane) i dont care if the x/y control is PS/2 or anythign.. all i need to know is.. what touch x/y touch sensor (no velocity) do i need to hook up and make work with midibox hardware.. OR any other hardware for that matter... IF i have to i will buy 12-16 KORG kaoss pads and be done with it and mount them to a panel.. i hope that you understand where i'm going with this.... this isn't just a fun project i have people depending on me to make this work!!!!!

ok :) i'm glad because you've been alot of help steering me in the right direction!

can i scale values of a non linear screen with a lookup table type program on the pic?

Oh and i thought that the pic chip doesn't have enought memory to write ps/2 drivers let alone LCD drivers?????

i dont mind doing custom work.. i jsut have no electronics knowledge, and no programming knowledge.... and i'm trying to implement what i want ANY way i CAN.... but i'm still learning and therefor asking alot of questions..

ok, i understand.. but what if their resistive screen isn't 10k of resistance then it wouldnt' be linear if hooked up to the midibox?

Ok i'm back on my x/y touch interface spree!!! but this is a new idea which i'd like your input on... So im' building a midibox and have a decent budget to work with. i am looking to implement 2 or more really nice touch interfaces with visual feedback... so i saw this display... http://shop-on-line.tvielectronics.com/product_info.php?pName=touch-screen-lcd-module-7&cName=touch-screen-lcd-modules that comes with this controller... http://shop-on-line.tvielectronics.com/product_info.php?pName=tc51854-lcd-controller&cName=lcd-controllers it says that "5 port pins of ATmega16 microcontroller (PA6, PD2, PD5, PD6, PD7) are available for your personal use" and it also says at this link... http://www.tvielectronics.com/TC_Controller_Descriptions.html#Touch_screen_controller The touch screen controller can respond by sending out X and Y coordinates of touch screen contact location... to computer or microprossessor... so my question is if i wrote some custom code into the midibox hardware would i be able to interpret that code as MIDI... if so is there anythign else i'd need to make this work? If not, would i be able to write a program into their ATmega16 chip (just like tk did for midibox) and just use that to send midi out and jsut stuff it into the same box as the midibox? my intention is to put 4 of these as an x/y controller and program their (or midibox if neccesary) controller to display the position of the current state of the control. i'm willing to lean to code these things eventually and any programming languages neccessary.

What about using a PIC18F4620/PIC18F4685 and give the touchpads their own CORE module?

well i only need 16 for absolute midi control, and 1 to actually control the computer :) also this is the problem.. but what i do want to see is if i can find anywhere on the circuit where i can "steal" a signal that i could use to drive midibox hardware.. i mean it's either resistive or capacitive correct.. if not it's only 50$ wasted.. and i still can use three of them for my own purposes :)

audio commander.. i wasn't angry in my post at all.. i jsut typed my reply's in red to be able to seperate them from the original quote! I do plan on getting 30 of them and seeing if i can make em work... i have a tendency to make electronics into fireworks... i will post my findings here... about the PS2 pads, what about plugging into the PS2 interface in the computer and just bypass the midibox hardware all together?

Now im' not lazy i've done alot of research in great detail.. i've been really reading but noone has CONFIRMED schematics or got one working.. so the fact is, now i will know that I have to be the one to try it all! All my findings will be documented and put on the WIKI.. with pictures etc.. so I am a community minded person and have spent over 400hours on here, ucapps, the wiki, and other various sites researching my options I'm sorry that I forgot to mention the plan is to connect more then 8 x/y's to an MB64 used to control ableton. Would i be able to take the PS2 touchpads here http://www.voti.nl/shop/p/S-Touchpad.html and use the PS2 interface and control midi? in the mb64 platform? are is there an appropriate part number for the spectrasymbol x-y pads because i see that people have been getting all kinds with weird diagonal x-y axis???

does anyone have any idea if this woudl work? sounds like it woudl induce a latency... but woudl it work?

Many questions looking for recent information! Okay after looking aroudn for a few days now, did anyone get an X/Y touch pad controller to interface with their midi box? Secondly did anyone figure out the definitive solution to the problem that occurs when you take your finger off of the membrane? this thread provides only a little useful information! http://www.midibox.org/forum/index.php?topic=5023.75 How difficult would it be to design a sample and hold circuit to get an one of these to work? If thats even the case???? has anyone wrote a ps/2 -> IIC or I2C whatever i'ts callled to get these working? (same as the VOTI.nl part) http://www.goldmine-elec-products.com/prodinfo.asp?number=G1283&variation=&aitem=1&mitem=36 anyone ripped one of these apart? do they have a sample and hold circuit in them? can we steal a signal from anywhere on the circuit? IF i need to make any circuits, to make this work i'd be willing to do a bulk PCB run for the whole community so everyone can have an x/y pad on their midi box... cmon guys lets pull together and make these things work.. we're soo close...

Going to bump this question as im' hoping that now someone may have an answer for me too!!!!