Set message value without sending midi

Developers
1

Is it possible to prevent a midi message being sent when the value of a message is changed with a function call <message>:setValue(newValue)?
What i want to achieve is updating the value of the pots by incoming sysex messages from a DAW. But the pots shouldn’t fire a cc message in response, because this will lead to a midi loop with the DAW sending the sysex messages and ultimately lead to a crash of the DAW. The pots should only emit midi messages when they are turned on the E1 controller.

2

Maybe not the most elegant solution, but you could set the pot to type virtual and write a custom handler for the pots, that checks if a message was being sent before processing the value.

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3

A very handy callback is parameterMap.onChange.
The first line in the function is enough to reach what you want.

function parameterMap.onChange(valueObjects, origin, value)
  if origin == MIDI then return end
    for i, valueObject in ipairs(valueObjects) do -- -- onChange manually or via LUA
    local parameterNumber = valueObject:getMessage ():getParameterNumber ()
    local parameterType = valueObject:getMessage ():getType ()
    if parameterType ~= PT_VIRTUAL then return end
    -- from now on only virtual parameters, manually changed
   .....
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4

The 4.0 has a Lua function (a method of the parameterMap) that allows setting the value without triggering all associated actions (sending a message, triggering callbacks, etc). I will provide all necessary info when the beta firmware is okayed by the community.

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