Waldorf PPG Wave 2.V, Руководство по эксплуатации

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PPG Wave 2.V
Operation Manual 31 Waldorf
Gate-signal is active for as long as you hold down the key. If you let go of it, Gate im-
mediately becomes inactive. In the sound creation process, this Gate signal can e.g. be
used to trigger an Envelope, which in turn controls the VCA.
LFO
LFO is an abbreviation for Low Frequency Oscillator. An LFO creates a periodic oscil-
lation with a low frequency. It has selectable waveforms. Same as an Envelope, it can
be used for modulation purposes.
Low pass Filter
Low pass filters are often used in synthesizers. This filter type attenuates all signal com-
ponents above its corner frequency. Frequencies below the corner frequency are not
attenuated.
MIDI
MIDI is an abbreviation for “Musical Instrument Digital Interface”. It has been develo-
ped at the beginning of the 80s and its purpose was, to connect electronic instruments
of different type and brand with each other. MIDI represented a considerable step for-
ward, as up to its development, no common standard existed to connect several sound
modules. MIDI made it possible, to use simple and always the same connection me-
thods to interconnect the devices. The basic principle is this: You always connect a
sender with several receivers. For instance, if a synthesizer should be played by a com-
puter, then the Computer is the sender and the synth is the receiver. For this reason, all
MIDI devices, except for rare exceptions provide two or three connection sockets.
The sending device transfers the information to the outside world via its MIDI Out so-
cket. The data travel through a cable and arrives at the MIDI In socket of the receiving
device. The MIDI Thru socket has a special purpose. It makes it possible that one sen-
der can reach several receivers. It simply mirrors the incoming signal without changing
it in any way. Another receiving device can therefore be connected to this socket. This
procedure results in a chain that interconnects one sender and several receivers. It is of
course desirable, that the sender can address each single device separately. For this
reason, the communication between the individual devices follows certain rules.
MIDI Channel
Important part of most MIDI messages. A receiving device only reacts to the incoming
messages, if its receive channel is identical with the send channel (which is part of the
message). This enables a dedicated transfer of information to one certain receiver. 16
MIDI channels are available and you can select from these. Over and above, a device
can also be switch into Omni mode, which lets it receive on all 16 channels.
MIDI Clock
The MIDI Clock message can be used to control the tempo of a musical piece. It is used
to synchronize time-dependent processes.
Modulation
Modulation is the process of influencing a sound generating element by sending it a
signal from a source called modulation source. Generally used modulation sources are