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Usb; Sound Generation - KETRON SD4 Manuel D'instruction

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• Press the value +/- keys to change the instrument's operating mode.

usb

The USB connection enables MIDI connection and communication between the sd4 instrument
and a personal computer. In particular, when sd4 is connected to a Master usb device, it is
able to use power directly from the usb connection. The usb connection alone is therefore
sufficient to switch the instrument on and set it in the selected operating mode. The first time
that sd4 is connected to a computer's usb port, it is detected and installed automatically by
the system. The device is recognised by the personal computer as a mIdI device with three
different virtual MIDI ports. The reaction of such ports is basically identical to the real ports
at the back of the instrument. The MIDI data are exchanged between the sd4 instrument and
the PC via USB to be able to exploit the instrument also as a MIDI interface. Supposing indeed
you have a Master keyboard with the classic Midi Out connector (five-pole) and you want to
connect it to a Computer that does not have the dedicated Midi In connector. To resolve the
problem, simply install the sd4 instrument between the Master keyboard and the Computer
in the following manner:
When you use the USB connection, remember that, considering that all the MIDI ports are
always connected, the MIDI data output from the personal computer could be sent back to the
inputs of the same and produce annoying sound loops. To avoid these problems, disable the
Midi Thru function of the sequencer used or set the Midi outputs of SD4 in "OFF". For further
details, consult the Midi Menu section of this manual.

sound generatIon

The sound generation of the instrument consists of the following sections:
• 3 GM banks of 128 sounds each
• 32 Drum set
• 82 Grooves (Drum 2)
There is another special bank of 128 sounds for a total of 512 different sounds.
There are also 128 presets, each of which may comprise a maximum of three GM sounds. A
Preset is in other words, a combination of sounds that can be assigned to each of the three
right, left or bass sections of the
instrument. For example: preset
49 (Piano&Strings) consists of the
following 3 overlapped sounds.
30
"ACC": Accordion
"ORG": Organ
"MID": 2 x Midifile

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