Creating real time Sys Ex messages for the Roland XV3080

Forum for JD, JV, XP and XV synthesizers from 1990's
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technical2654
Posts: 2
Joined: 10:27, 4 June 2014

Creating real time Sys Ex messages for the Roland XV3080

Post by technical2654 »

I want to use my Novation X Station to control the Roland XV3080 synth module. The Novation allows me to enter a string of up to 20 hexadecimal bytes to be defined for each controller on the Station. I don't quite understand how to set up the correct Data Set 1 string, mainly because the guide (http://www.chromakinetics.com/handsonic/rolSysEx.htm) and Roland's user manual (http://www.media.rolandus.com/manuals/XV-3080_OM.pdf page 187) don't clarify how this is done dynamically, i.e. for a real time controller rather than for a one-off message calculated by the user.

Let me use as an example the Patch Tone TVF Env Time 1 parameter. My questions:
  • How do I find the full address of the parameter in the Parameter Address Map? The guide instructs me to add a Start Address to the Offset Address, but I'm confused. The Offset Address of this parameter is 00 55. Which Start Address do I add to this, and why?

    What do I put in the data string for the data value, as that depends on the control setting?

    What do I put in the data string for the checksum value, as that depends on the data value of the control setting?
rcraven
Posts: 629
Joined: 14:36, 9 September 2007
Location: Melbourne Australia

Re: Creating real time Sys Ex messages for the Roland XV308

Post by rcraven »

The sad news is that Roland use a checksum to make sure the sysex received has not been corrupted.
This checksum is calculated using the address and data.
As, I can only find one variable, the data byte (DV), and no way to calculate the checksum you can't use a varying sysex message for the XV3080 with the X-Station (the BCR200 does it quite happily).

Instead have a look at the Matrix Control in the patch to assign a CC type as the Source and and TVF ENV A-TIME as the Destination and use that type CC messages out from the X-Station,

All the best
Royce
technical2654
Posts: 2
Joined: 10:27, 4 June 2014

Re: Creating real time Sys Ex messages for the Roland XV308

Post by technical2654 »

Thank you, that's very helpful.
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