Mapping Alesis QX25 knobs

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Hi everybody,

I’m trying to map my QX25 knobs with Cantabile.
I want them to increase/decrease the gain of a rack in a song, not set a gain value. The problem is that the knobs behavior is to set a value from 0 to 127, not increase/decrease.

Is there any trick in Cantabile to do this ?

Best regards,


I can’t see any way to convert absolute controller values to relative ones - problem is that once you reach the ends of the 0…127 range, the values sent by the knob don’t change anymore. Is there any way you can re-program the knobs of your QX25 to send increase/decrease messages?



Not sure whether the ability is there or not from reading this chart. (From a QX49)