Sign in to follow this  
Followers 0
Zam

JU60

3 posts in this topic

Hi all

My next midibox project concern my juno60

There is two topic, all the CV handling for all slider parameter, no test yet, but I have a clear view about what I'll do about it.

Then the keyboard, note on/off to remote play the JU60 via midi note...

I try interfacing a matrix "reader" with 1 DIN scanning the JUNO CPU output (to KB), and a "return" with 1 DOUT to the JUNO CPU, with "result" but not usable. The idea is to active a DOUT pin at the proper instant compared to DIN scan (which row is scanned) so the JU60 CPU know which note is virtually pressed...

I guess my issue here is the time sensitivities (as maybe component and clock between two system)

The question is simple, what is the fastest possible loopback latency with mios (MB_NG in my case) to trig a DOUT pin according to a DIN status ?

For what I see so far in my Oscope, the JUNO seem to scan the KB (and other buttons...) within 1ms so I guess I should send a DOUT trig in less than 100us (and for less than 100us) after the DIN "read" a row.

I think a lot about the method and end up with this idea, a matrix reading a matrix, but I don't know if my approach is the good one...

Input welcome

Best

Zam

 

ps: I also think about DCB emulator with midibox, but I'm not good enough to code this...

 

Edited by Zam

Share this post


Link to post
Share on other sites

Posted (edited)

@Zam
I just restore then mod a juno 60 for a friend using the juno-66 from tubbutec, it works great!
The only critic is that they provide not enough length cable, I was obliged to change them to follow the existing cabling path, I did not change the MIDI I/O cable then cable is straight from cpu to old DCB position(not very good too).
But this mod is great and add a lot of features to the juno-60 I highly recommend it to you, do not reinvent the wheel, they made it very well.

IMG_0181.jpeg?raw=1

IMG_0186.jpeg?raw=1

IMG_0188.jpeg?raw=1

IMG_0185.jpeg?raw=1

IMG_0189.jpeg?raw=1

Best regards
Bruno

Edited by Antichambre

Share this post


Link to post
Share on other sites

Salut Bruno !

Yes you'r right, that also my conclusion since I post this

But I personally don't like the idea to swap the MCU

I will probably go for the CHD solution

http://www.chd-el.cz/index.php?id=468&lngid=en

Hooked at a midibox core (via J11) to have USB midi and 16 ch Ain/Aout (J19) to read/write analog pot and automate all parameters :rolleyes:

If only I have time and code skill, I'll design a full midibox HW and SW solution for Juno60 retrofit...

Best

Zam

 

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!


Register a new account

Sign in

Already have an account? Sign in here.


Sign In Now
Sign in to follow this  
Followers 0