Here’s his description of his midiclock-integrated setup :
The Headsynth is a facemask with seven knobs and an accelerometer reacting to head movements.
(is not really a synth, just a MIDI-controller to make it look and feel like you have a synth in your head!)
The Gravity Harp is a metal frame with 2 pendulums, 2 springs and 2 goseneck lights, their movements being sensed by 2-dimensional accelerometers.
The analog signals are converted to MIDI to live-generate and modulate electronic music and vector graphics.
My aim is to go beyond the practice of merely adding suitable visuals to music (or vice versa) and create a supra-modal instrument where visual and musical expression as well as physical movement and spatial experience are linked together already from the onset of their conception.
MIDIclock has become an essential part of my live setup, allowing me to control the tempo (for example from one of the knobs of the Headsynth mask), keeping synch between synth arpeggios, beats and delay effects…
Thank you Serge !

Matti Kallioinen Live Setup with Midiclock

Create MYINPUTDRV.INI in the subdirectory indrv.

Create this content (for example, this is for my LPD8, K1 button, use midi learn later on to override the midi input code with your own)
[DEVICECONFIGURATION]
DEVNAME=MYTESTDEVICE
[SPECIAL_COMMANDS]
INPUT0=B901E0
ACTION0=10000

[CUSTOMRANGE_TRANSFORMS]
RANGEMIN_E0=00
RANGEMAX_E0=7F
RANGEMULTIPLIER_E0=2
RANGEOFFSET_E0=0
RANGEMAP_E0=CUSTOMRANGE_MAP3

[CUSTOMRANGE_MAP3]
0=0
1=1

Then use an excel file such as those below, to create a custom range mapping.
Openoffice calc example of the CTRL to BPM mapping example
Excel version of the CTRL to BPM mapping example

Copy the values from the excel file into the INI file.
You will get something like this. (replace , by . if necessary, this depends on your regional settings).
[CUSTOMRANGE_MAP3]
0=25.158
1=25.651
2=26.16
3=26.684
4=27.224
5=27.78
6=28.351
7=28.937
…
This example mapping shown in a chart :

Now save the INI and start midiclock, after setting the correct input code for your controller,
you can use this custom map. (and you can create any new one using calc or excel)

The resulting sample input driver is available here (rename to MYINPUTDRV.INI and place in indrv) .
enjoy !

Alternatively, you could, for example, control the tempo by tapping your G7.1ut’s pedal:

you can find a draft version of the documentation for midiclock
here.

Enjoy !

Here’s a quick guide how to set this up :
On the screen shown below, edit parameter (5) :Midi Sync.

You can set this to Auto or MIDI to synchronize with midiclock :
Setting MIDI : the XS will always sync to the external midi clock
Setting Auto : the XS will sync to the external midi clock when it is received.
When no midi clock is received any more, the XS will switch to the last received tempo.
This will also be the value of the internal clock.

Use the following menu :
[F5] MIDI –>[SF3] SYNC–>MIDI Sync :
Set to ‘internal’ for synchronization to internal clock. Use this setting when this synthesizer is to be used alone or as the master
clock source for other equipment.
Set to ‘MIDI’ for synchronization to a MIDI clock received from an external MIDI instrument via MIDI.
Determines whether Song/Pattern/Arpeggio playback will be synchronized to the instrument’s internal clock or an
external MIDI clock. Of course this is also the recommended setting if you want to sync to midiclock.

By setting the external clock to ‘on’ in the utility menu, you can enable the midi clock reception for your instrument.