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MIDI CPU configuration not update !

September 9, 2014, 8:23 am
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Connect MIDI CPU to MIDI Interface :


Test sending SysEx to the MIDI CPU.


1.Disconnect power to the MIDI CPU.
2.Connect the “CAL L” terminal to ground.
3.Re-connect power to the MIDI CPU. The Activity LED will remain lighted.
4.Send the firmware update SysEx message to the MIDI CPU.

F0 00 01 5D 04 01 00 00 00 4C 00 00 00 F7

The LED blinks continuously when the receipt of a firmware update SysEx message.

and then I'm try again. Some time the Activity LED will deactivate.

5.Disconnect the “CAL L” terminal.
6.Disconnect power to the MIDI CPU.
7.Power up the MIDI CPU, and send the following SysEx message: F0 00 01 5D 04 0B 7F F7

8.Test input terminal : 0 It's return message : Note On,Note off (Factory Default config)



Help me ,Please. Thank you.
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De-bouncing buttons - circuit question

September 10, 2014, 7:18 am
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Hi all

I've made a basic foot pedal using the out of the box config of the MIDI CPU with 3 momentary buttons wired to the first 3 logic inputs.

over time the buttons are degrading and sending multiple MIDI notes in quick succession so I suspect I need to add some de-bouncing circuitry

given that the logic inputs are held at +v via internal pull up resistors, do I simply need to wire a capacitor across the button (i.e. between the logic input and ground) - and if so what sort of capacitor is recommended? (electrolytic? etc) Or should a resistor also be added from the input to +v??

many thanks for any suggestions (including suppliers of better foot-stompable but non-bouncy buttons!)

cheers
:L
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Reset CC values from potentiometers after restart

September 10, 2014, 8:36 am
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Hi MIDI CPU community.
I have a question.
I'm wondering if what I'm experiencing with my MIDI CPU is normal.
I have 8 x 10k potentiometers soldered to control terminal 8,9,10,11,12,13, 16, 17 and a switch hooked to control terminal 7.
Each pots send a different cc number (from 20 to 27) on MIDI channel 1.
The switch sends a note on message on channel 1.

After powering up the MIDI CPU with a 9v battery, I monitor the output of the MIDI out.
Here's what is wrong :
If I turn the pot on terminal 8 (CC #20) for example, it sends the right CC value but it also sends some CC values configured for other pots.
Same thing happen when I turn the other pots.
The trick I found to make things works right is, after powering up, to turn all the pots from minimum value to maximum value.
Then, after this routine, all the pots works fine sending the right CC number.
Is there something wrong with my configuration or is it normal to kind of reset the pots when the MIDI CPU is restarted?
Thank you for your help.
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Phantom CC messages

September 15, 2014, 5:57 am
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I am trying to get 5 CPUs programmed and at least one is giving me headaches! I am using a 12 x 6 matrix so all 24 pins are used because the sense lines require two pins. Two of my CPUs have been successfully programmed and function essentially as expected although they do not give the proper MIDI channel. The third CPU seems to accept the program but when I press keys not only do I get the note on/off data, several keys also produce CC data. Also, when I go to retrieve the data, the CC messages never stop. Here is the code I have sent to the CPUs. The only thing changed from one to the next is the channel #. However, all CPUs continue to send data out channel 1.

Code:
// Fixed Header
F0 00 01 5D 04 01
// Layer 00h
00

// Control Terminals 0-11 are select lines.
// 0, 2, 4, 6, 8, 10 monitor data on terminals 12-15 (address 01h)
// 1, 3, 5, 7, 9, 11 monitor data on terminals 16-23 (address 02h)
00 00 2D 01 24 04
01 00 2E 01 2C 00
02 00 2D 01 30 04
03 00 2E 01 38 00
04 00 2D 01 3C 04
05 00 2E 01 44 00
06 00 2D 01 48 04
07 00 2E 01 50 00
08 00 2D 01 54 04
09 00 2E 01 5C 00
0A 00 2D 01 60 04
0B 00 2E 01 68 00

// Control terminals 12-23 are data lines.
// Use mode 7Fh (input only) for both transitions tt=0 and tt=1.
0C 00 7F 00 00 00
0C 01 7F 00 00 00
0D 00 7F 00 00 00
0D 01 7F 00 00 00
0E 00 7F 00 00 00
0E 01 7F 00 00 00
0F 00 7F 00 00 00
0F 01 7F 00 00 00
10 00 7F 00 00 00
10 01 7F 00 00 00
11 00 7F 00 00 00
11 01 7F 00 00 00
12 00 7F 00 00 00
12 01 7F 00 00 00
13 00 7F 00 00 00
13 01 7F 00 00 00
14 00 7F 00 00 00
14 01 7F 00 00 00
15 00 7F 00 00 00
15 01 7F 00 00 00
16 00 7F 00 00 00
16 01 7F 00 00 00
17 00 7F 00 00 00
17 01 7F 00 00 00

// Footer
F7
Since no terminals are programmed as CC inoputs, how could the CPU be sending out CC data?

Help!
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CS-01 MKII assembly for UMR2

September 16, 2014, 8:00 pm
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Hi,

So apparently the CS-01 MKII is a bit different of a board to the MKI. I had a friend solder up my UMR2 to the board and he was unsure if the following points with the red and black wires were correct, since the black has two points on the board instead of just the one on the MKI and schematic. He assumed that it was fine to solder to the two points since he said he figured this was just for ground, but to check before I fired everything up so I don't toast the board.

Can you please confirm?



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Yamaha Psr 500m adding CC

September 17, 2014, 4:16 pm
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Please let me know if this is possible. I have a Yamaha PSR-500m that I already took apart.

I removed all of the fluff and now have just the main board, the keys with circuits, and the power switch. It works great as is except for two things.

I want to add a mod wheel (which it never had), and the octave buttons were part the extra circuits that I removed and it doesn't seem possible to tie into.

So...my plan is to cover both of these with a separately powered Midi Cpu mounted internally and either plugged in or hardwired after the existing midi signal. I will build a case for this after i get everything in order.

Is this possible or a silly plan? Since the CC output is generated from the Midi CPU itself it should merge, correct?

*One thing I left out which you probably figured out is that I will be using this as a controller for VSTs.
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25key bluetooth keyboard

September 18, 2014, 6:29 pm
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So what I would like to do is build a portable midi keyboard probably by a repurposed toy keyboard or buttons. It will have 4 potentiometer. For the bluetooth I was thinking about using the adafruit bluefruit
http://www.adafruit.com/products/1697
My question is, is this possible? If not is there any way to add bluetooth to the midi CPU?
- Mike OP
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Cheap midi USB/Midi interface fix (?)

September 22, 2014, 2:30 am
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I am facing (awaited) difficulties sending sysex messages with my cheap USB/midi interface.

I have already ordered a M-audio midisprot uno interface (hope it will work fine), but looking for some more information I have found this.

http://www.arvydas.co.uk/2013/07/che...y-be-required/

I will for sure open mine. Just curious about what I will see inside :rolleyes:

some more experiment here
http://www.frank-buss.de/midi/index.html

It seems that often only the three first bytes are send , which explain why note on/off messages works but not sysex.
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CPU won't take a program

September 26, 2014, 6:17 am
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I have five cpu boards. I have been able to program 4 of them but the fifth does not want to take any new configuration data. It does respond to dump requests but every time I try to send a new config file I just get the same data back from the dump. When I send the file, the LED blinks briefly. I've tried sending with both SendSX and MIDIOX. I've also tried two different MIDI interfaces - a Behringer FCA610 and a Yamaha UX16.
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MIDI retro fit for lowrey magic genie 44

October 2, 2014, 1:03 pm
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Hey there,

I'm new to the forum (but not new to modding). I have an old lowrey organ that I want to midi retrofit. I just want it to receive midi on and off keys. That's the extent of it.

The schematics are here:

http://www.lowreyforum.com/manuals/T...enie_Part1.pdf

Was just wondering if this was possible?

Thanks.
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SIMI Midi display pedal

October 3, 2014, 6:00 am
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Hi .

I don't know if it is allowed to post here for third party products, but I have read today about what is for me a very original and complementary product to all Highly liquid products, and I wanted to share that with you.

http://moltenvoltage.com/products/SI...n_Voltage.html

http://www.youtube.com/watch?v=Ms5eg...d=1&autoplay=1

http://moltenvoltage.com/downloads/S...ers_Manual.pdf

This little pedal is simply an all in one solution for a nice MIDI information display to complement DIY project based on Midi cpu or other product from Highly liquid. (I am currently working on a midi controller for an Axe FX II based on midi cpu)
just connect the midi out from controller to midi in of this pedal, and you get display of midi message !!
And the display can easily be customized :D

We can also imagine to directly include the pedal as it is in our own enclosures, due to a limited size for a big display !

Original and nice pedal in my humble opinion.

Nota : Maybe talked a little to quick.
It seems that it accept just midi programm change messages, but small midi sysex messages too)
It remains an original product
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Project for live and production music

October 9, 2014, 4:37 am
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Hello everyone.

I will surely in a few months try to build the perfect machine to fulfill my expectations.

I need 16 motorized faders, 48 rotary and 48 buttons, if possible assignable color lights on the buttons and the rotary.
I'm totally new in the building of my own machine but i got all the tools, a certain sense of logic, and people who knows more than me to help me.

I'll need this machine to product music in a simplified way in ableton live and also to do live music with the company of my homemade electronic drum.

I also need to built a 13 triggers to midi box for this drum but i think this is not really the good site maybe.

For the moment instead of this midi interface i'll just take a Behringer BCF 2000, but i need it to be really bigger and i also love the fact that i can build it myself, making just what i need to be perfect and not buying pre-made stuff that will never completely satisfy me.

I wanted to ask what i need for it.

Thanks by advance and pardon my english, i'm french...
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POD HD Pro foot controller

October 9, 2014, 7:53 am
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Hi guys! I'm newbie on this forum, in MIDI and in schematics so don't be mad, please =)
I want to build foot controller for my POD HD Pro, something like Voodoo Lab GCP . I want it to have 8 buttons for turning on/off stomp boxes in the effect chain, 4 buttons to switch between ABCD presets, 2 buttons for bank up/down and 2 output for exp pedals. Also I want it to have led indication on each button (indication for chosen preset and for turned on/off stomp boxes in the preset). So can you show me, what info will be useful for me? how much midi cpu's I'll need? I'll be grateful for any help :)
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Kimball organ conversion

October 10, 2014, 3:15 pm
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Hi, i have a kimball organ model 531 and was trying to see if its possible to use one of the midi boards sold here to convert it over? The organ still works and want to be able to use the stock speaker system built in if possible. I really don't know where to start and if its even possible with this organ.

Having both keyboards and the bass pedals setup to midi would be nice but just the keyboards would work fine.Added a few pictures of it too.

http://imgur.com/yz2fdHC,15vfEg0#0
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sending midi chords

October 22, 2014, 9:27 pm
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For years I have been searching for a midi controller that will send a chord and not just one note. I play bass guitar in a blues band & I want to play Hammond organ type chords with the foot controller. Since most of our songs are 3 chord progressions I really only need 3 buttons to push. In the version 1.3 discussion you explained how by using layers I could send a 4 note chord with each analog switch. The tricky part I think would be figuring out how to change keys for the next song. Maybe a couple of CPUs daisy chained with each one programmed for that key? Is this a feasible project?
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boss dr110

October 25, 2014, 11:23 pm
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hi, is there a way of adding din sync to the boss dr100?
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Midi Foot Controller for Kemper Profiling Amp

October 26, 2014, 5:21 pm
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Hi guys,

first of all I have to say, this is a very interesting forum about very
interesting products. I'm pretty new to the whole midi programming thing
but I have professional help at hand to realize the little project I want to do.

So here's what I want:

I'm a guitarist using a Kemper Profiling Amp and I want to control it. Change patches and effects on and off.
I thought about it a bit and since I want to keep things simple, I think I can control everything I want with a single layout. So no program changes, only CC.
The KPA allows me to change rigs via MIDI CC.
So every button in the final layout will have one single CC to send which I hope will be relatively easy :-)
I want to have some LED indicators to show me what I'm currently using. That will be a bit more complicated I guess. There will be five buttons for rig change and there should be only one LED active at once. So if i press button two, only the second LED is on etc.
One of the buttons should be TAP-Tempo so the LED should be blinking in time.

I also want to be able to connect two expression pedals to my midi-footcontroller, which will also have only one single thing to do.

I'm not yet sure about the way to show me what rig I'm in.
Since I've seen videos where Midicontrollers take over the name and tuner ability of the kemper, I guess it is sending some date on its midi-out. But I'm not yet deep enough into it to know how this works :-)
In the best case I can integrate some kind of little display that shows me whats going on in the KPA. If it is not possible I will live with that.

So what product(s) do I need to realize this? And how complex will my unit be?

Thanks in advance!
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New user, simple 5-switch 3-LED foot controller

October 29, 2014, 8:43 pm
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Hi everyone,

Just received my MIDI CPU and am planning to build a pretty simple foot controller. I have all the parts and the soldering skills (I've built and modded many guitar pedals), but am new to coding SysEx messages. I've done the power test, CT test, and confirmed that I can send and receive MIDI through an M-Audio UNO. I'm using SysEx Librarian and MIDI Monitor on a Mac.

The controller will have 5 momentary switches and an expression pedal input to supplement a Roland GR-55. 3 of the switches will send CC messages to turn on/off effects and have latching LEDs to indicate status. The other 2 switches will be bank up/down (no LEDs) since the GR-55 has no dedicated bank switches.

With only 5 switches and 3 LEDs I believe I won't need a matrix, but I'm still a little cloudy on the concept of a switch on one CT controlling the on/off state of an LED on another CT.

Also, I can't tell how the input jack for an expression pedal is wired. I'm using a Roland EV-5, which has a TRS plug. Is it wired like a pot? Tip to DC+, sleeve to G, ring to a CT? And what are the advantages/disadvantages between internal and external reference voltage, or do certain situations require one or the other?

Slowly working my way through the firmware manual just to begin grasping the concepts. Looking forward to the build and, of course, appreciative of any help with the code.

Arch
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Casio PT-1

October 31, 2014, 1:03 pm
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Hi everyone,
I'm interested in retrofiting the Casio PT-1.

Since I fully understand and manage to apprehend the John and other's guides to UMR2 for others model, but I can't begin to comprehend from scrath the matrix and scopes, if someone had some clues to help me out starting... maybe a similar synth already done with a guide here... (the VL-1 ? but it seems problematic here with low voltage : http://forum.highlyliquid.com/showthread.php?t=1226)

Thanks if anyone could help a little. The PT-1 seems pretty common to me, it's a shmae I couldn't find any tutorials out there. Anyway, I'll report back with full details and video.

Thanks again. Attached, the matrix.

Attached Images
 
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slateboy's SysEx coding tool?

November 2, 2014, 12:03 am
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