parameter value request with sysex

rawalpundi · Post by **rawalpundi** » Sat May 09, 2015 9:05 pm

Hi,

I have just read this old post about a program for AL-1 settings through a PC :
http://www.korgforums.com/forum/phpBB2/ ... sc&start=0

I am very interested since I am trying to do the same thing with an iPad.

At the moment, I can send sysex message to control parameters from the iPad to the Kronos.
And also to receive and display on the iPad any parameter change on the Kronos GUI.

The last thing I would like to do is to request the current value of a Kronos parameter from the iPad.
But I can't find any information in the technical documentation. Except dump request message but it is to big.

does anyone know if it is possible with a sysex message ?

Thanks,
Guillaume

Chrutil · Post by **Chrutil** » Mon May 11, 2015 5:26 am

Hi Guillaume,
I haven't done any Kronos stuff for a few years now, but last I checked a dump request is all there is - it'll dump program data for a single program, which is quite a big chunk, but we're talking a five, six kilobytes - so a second or two to transfer a program, and you'll keep the data around so you only have to request a program dump when the user actually changes program on the Kronos.

The source code to the AL-1/Polysix editor, is still available at:
http://www.chrutil.com/kronos/AL1EditorSource.zip
if you are interested to take a peek.

Please share any progress you make with the forum! Always fun to see what cool things are made.

Thanks,
C

phenaste · Post by **phenaste** » Mon May 11, 2015 9:35 am

All needed informations are provided in MIDI implementations KRONOS_SysEx_2_1
http://www.gearzonemusic.com/Kronos/KRO ... Ex_2_1.zip

I read that Editor 2.1 (OS 2.1) is compliant with OS 3.0.2 except for Global Data.
So I suppose that Global SysEx are differents...

Now you'll have to decode all the thing to make it works

Cheers.

rawalpundi · Post by **rawalpundi** » Mon May 11, 2015 4:14 pm

Thank you for the answer Chrutil. I was afraid to hear that ... I was looking for an easier way to get a Kronos current value parameter, because I don't develop any app on my own. Instead I use TB Midi Stuff :
https://itunes.apple.com/fr/app/tb-midi ... d480953919

It allows to design a custom MIDI control panel. There is a few hours learning curve, but then it is easy and fast. The tricky part is to understand the sysex Kronos documentation ! (see Phenaste previous post).

For interested people, here is a screenshot of my work in progress :
https://sites.google.com/site/al1contro ... G_0057.PNG

and the associated TBMidiStuff file :
https://sites.google.com/site/al1contro ... /AL-1.tbms

There are only the oscillators and mixer sections. I plan to add filters, enveloppes and so on, as long as there is enough space on the iPad panel !
As I don't know yet how to get the current AL-1 settings from the Kronos, it should be considered as a one way control from iPad to Kronos, starting from a void "Init EXi Program" on the Kronos.