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3.5 Using the VIRTUALIZER PRO in a MIDI system
With its built-in MIDI interface the VIRTUALIZER PRO can be integrated into any MIDI system. It transmits
and receives both program change and controller change information to perform program changes via MIDI
from a sequencer or any other MIDI device. Wire and set up the VIRTUALIZER PRO as shown below:
Fig. 3.4: Connecting the VIRTUALIZER PRO via MIDI to a sequencer/computer and a keyboard (optional)
3.6 Saving data via MIDI
The VIRTUALIZER PROs MIDI implementation also allows for archiving one or several presets on an external
storage medium. Proceed as follows:
Connect the MIDI OUT jack of the VIRTUALIZER PRO to the MIDI IN jack of a MIDI data recorder (e.g.
sequencer). Press the STORE and In/Out keys simultaneously to enter MIDI mode. Set program change
mode to 0 and controller change mode to 3. Now quit MIDI mode by pressing the STORE key. Use the jog
wheel to select the preset whose data you wish to save. When the preset is activated its parameters are
transmitted as controller data and can be recorded on a sequencer or similar device. Repeat this routine until
all presets of your choice have been sent to the external data recorder.
To load archived data back into the VIRTUALIZER PRO, you must enable controller reception in MIDI mode
(see 2.5). Then, start the sequencer to automatically transmit each preset data set back to the
VIRTUALIZER PRO. Press the STORE key, select a program location to store the data and then press the
STORE key again. If you want to automate MIDI store functions you must enable the store mode, to switch on
the reception of controller #28. This allows you to directly store any modifications of the actual preset on the
preset number that is transmitted with the controller. You can also restore a complete preset that has
previously been recorded with a MIDI sequencer on the same location it had before.
4. TECHNICAL BACKGROUND
4.1 Digital Audio Processing
In order to convert an analog signal e.g. music into a series of digital words, a so-called Analog to Digital
Converter or ADC is used. The converter works by viewing the incoming signal 44,100 times per second,
giving a rate of 44.1 kHz, and in each case measuring the signal amplitude, and giving it a numerical value.
This form of measuring the signal regularly over a period of time is known as sampling, the conversion of the
4. TECHNICAL BACKGROUND
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