i found a post at VGuitarForums
it looked very easy to build a converter to control the Variax via MIDI.
in the post is written that you have to send a SysEx wakeup call to the variax before sending MIDI Program canges.
But my Variax 300 understand the command without sysex.
i only had to connect pins 4 and 5 of the MIDI Socket to pin 7+8 of the RJ45 Socket and it works.
In addition i use a power supply (9V DC) at pins 1+2 of the RJ45 to power the variax.
this little prototype works fine.
Now i can use different Guitar Models on my variax without doing complicated switching on the guitar.
I only have to switch to another performance slot.
if anyone is interested i can post a list with the Guitar Models on the Variax and their corresponding program Numbers.
Wow ... very interested (V'ax 500 + 700) - Thanks for the heads up! - The list would be most useful.
Found the Model-list at
edit: sorry, this is not the excel file where i copied the model list. at the moment i don't find the original post, but this file can be interesting too.
and added the pgm numbers as they are sent from the Kemper
Thank you ... I now have the PGM numbers
(note: the Model list 'is not available' from the link)
you have to be a registered user of the line6 forum to download this file
i did some more research.
i added a RCA Connector to my prototype
i connet it to the input of this cheap digital to analog converter.
The Output of the coverter i connect to the effects loop return of the Kemper.
When i am switching to a preset for the variax, i engage the loop and switch from normal Guitar to variax.
With this few parts i can connect the variax with only one cable.
I also did an update to the preset list
you can still access the factory settings (Programs 61 and above) after overriding the settings with your own guitar models/tunings.
looks interesting. JTV59 owner here.