MIDI Control of System Tempo?
Posted: 22:41, 2 January 2017
XV-2020
I'm trying to figure out if System Tempo can be adjusted by way of keyboard controller (Alesis VI49) knobs and/or switches.
It was easy to assign Volume Control - CC 7 - to one of the knobs, for example, since the XV-2020 owners manual makes that function clear (pg. 103).
Patches can have one or more clock-based parameters (LFO Cycle, MFX delay time, etc.) whose rate can be set to follow the System Tempo setting. Pages 100-102 actually show examples of this using Matrix Control, but stop short of explaing how the System Tempo itself is controlled.
I know this can be done by means of XV-2020 Editor application's virtual control surface, but whether it can be done from the external keyboard is not addressed. The following are the MIDI messages sent when adjusting System Tempo with the Editor. Each string begins with F0 41 10 00 10 12 02 00 00, followed by:
1F 01 04 5A F7 for 20 BPM,
1F 07 0F 49 F7 for 127 BPM,
1F 08 00 57 F7 for 128 BPM, and
1F 0F 0A 46 F7 for 250 BPM.
Apparently System Tempo is a function of System Exclusive messages (see pg. 147 under 1-2-1 System Common), and from my online research it appears that these might be sent via something called NRPN or maybe RPN.
Again, the manual is of no help to me here, even though it makes a tantalizing reference to something of the sort on page 100 under Source 1-4 (Matrix Control 1-4 Source).
Anyway, it seems to me that full-blown synthesizers woud probably have this capability, and I'd like to know if anyone could help me solve this riddle as it applies to my simple setup.
Thanks very much.
I'm trying to figure out if System Tempo can be adjusted by way of keyboard controller (Alesis VI49) knobs and/or switches.
It was easy to assign Volume Control - CC 7 - to one of the knobs, for example, since the XV-2020 owners manual makes that function clear (pg. 103).
Patches can have one or more clock-based parameters (LFO Cycle, MFX delay time, etc.) whose rate can be set to follow the System Tempo setting. Pages 100-102 actually show examples of this using Matrix Control, but stop short of explaing how the System Tempo itself is controlled.
I know this can be done by means of XV-2020 Editor application's virtual control surface, but whether it can be done from the external keyboard is not addressed. The following are the MIDI messages sent when adjusting System Tempo with the Editor. Each string begins with F0 41 10 00 10 12 02 00 00, followed by:
1F 01 04 5A F7 for 20 BPM,
1F 07 0F 49 F7 for 127 BPM,
1F 08 00 57 F7 for 128 BPM, and
1F 0F 0A 46 F7 for 250 BPM.
Apparently System Tempo is a function of System Exclusive messages (see pg. 147 under 1-2-1 System Common), and from my online research it appears that these might be sent via something called NRPN or maybe RPN.
Again, the manual is of no help to me here, even though it makes a tantalizing reference to something of the sort on page 100 under Source 1-4 (Matrix Control 1-4 Source).
Anyway, it seems to me that full-blown synthesizers woud probably have this capability, and I'd like to know if anyone could help me solve this riddle as it applies to my simple setup.
Thanks very much.