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PPG | EVU
|The PPG EVU is Wave 2.3 in a rack. There is no display nor control knobs however it features 8 separate outputs that could be adjusted in the stereo spectrum for some unique sound placement.
The PPG EVU is largely considered much more stable than the PPG Wave 2.2 keyboard. A player could have one PPG Wave 2.2 and up to 3 PPG EVU rackmount units connected to a Waveterm computer for a full 32 voices.
The EVU extends the sound and compositio· nal bounderies of the PPG System. The EVU is a System Component in which sounds and Se· quences can be loaded from the WAVE TERM. Electronically speaking the EVU corresponds to a WAVE 2.3 (without the Keyboard). It has 8 Voices with 16 Oscillators, eight 24dB/Oct VCFs, eight VCAs etc. All controls of the WA· VE 2.3/2.2 can be switched to the EVU to modulate all the sounds stored there. New methods have been employed in the design of the EVU. For example, the EVU has, apart from the well known WAVE 2.3/2.2 functions, addition superior control possibilities which the WAVE 2.3/2.2 Keyboard Control Panel could not manage.
The EVU itselfs has only the most important control elements since the usual functions are normally carried out by the WAVE 2.3/2.2 Keyboard and the more complex ones from the WAVE TERM.
The EVU has eight Voices which can produce a sound stored in the eight BANKS at each musical event. These BANKS can be loaded with eight digitally stored 8 bit or 12 bit natural sounds or Wavetables using the WAVE TERM. These sounds can either be played on the WAVE 2.3/2.2 or PRK Keyboards, or by EVU Sequencer.
Using the WAVE TERM you can load either own recorded 8 bit sounds into the EVU BANKS, or 12 bit sounds supplied by PPG, or Wavetables with Sound Programs from the 100 available.
The BANKS can be loaded with completely different sounds. In order to not have the trouble of loading the same natural sound or Wavetables every time they are required the BANK arrangement can be stored on to diskette. The WAVE 2.3/2.2 control functions can be switched to the EVU to modulate the 8 bit or 12 bit sounds stored there. These modulations can be stored without losing the original sounds. Loading the EVU with completely different sounds (eg: kickdrum, snare, bass, cymbal, sax, synthi, tom-tom, trumpet) allows multi instrumentation either played by hand on the keyboard or by the Sequencer. Each sound receives its register either on the WAVE 2.3/2.2 Keyboard or on the PRK.
Acoustic instruments obtain their individuality not only through their frequency but also through their specific sound quality. In order to make them sound realistic in various registers the EVU uses MULTI SAMPLING. This means that several BANKS will be loaded with the same sound (in various registers eg: Grand Piano) sampled at different pitches. These sounds are then distributed over the Keyboard. The EVU Programs can be stored on to cassette. Natural sounds and whole compositions can only be loaded from the WAVE TERM. When playing on the Keyboard the WAVE 2.3/2.2 Programs can sound simultaneously with those of the EVU. The EVU has the same Wavetables as stored in the WAVE 2.3/2.2 and therefore whole D data blocks created with the WAVE 2.3/2.2 can be loaded from the WAVE TERM into the EVU.
Controlling the BANKS with the Event Generator
Simular to the WAVE 2.3/2.2 the EVU has an 8 Voices polyphonic Sequencer. This Sequencer can play Sequences created with the WAVE 2.3/2.2 or WAVE TERM. In addition when using the Sequencer it is possible to playa Sequence with either a WAVE 2.3 or 2.2 and simultaneously the other eight Voices of the EVU with completely different sounds or notes. If you have a secont EVU you can extend this up to 24 Voices.
The number of Voices is the same as number of tracks. If for example you have the following instruments in the BANKS - flute, tenor sax, E-bass, synthi sound, kickdrum, snare, hihat, and tom-tom - you can have the flute play the E-bass, kickdrum, hi-hat and snare lines in four polyphony and than when the toms playa fill have it revert to its own line. These lines can be played in any imaginable register and at any loudness desired.
By entering values 0-7 at BANK (EDIT Mode) every note can receive its own colour when using the Sequencer (the UPDATE modulation can be done at a later date as usual). The 8 Voices have their own seperate outputs in the form of jacket sockets on the front of the EVU. These can be fed to the inputs of a mixing desk.
|LFO||1 Saw Up, Saw Down, Square, Triangle|
|Engine Detailed||2 WT OSC, 30 Wavetables with 64 waves per table. 8-bit|
|Filter (VCF)||1 24dB Slope (4-pole), Low Pass (CEM3320)|
|Envelope (VCA)||2 ADSR, 1 AR|
|Recording||8 track, 1000 note, 10 sequences.|
|Legend:||Obvious||Y: Yes, N: No, N/A: Not Applicable|
|VCO||Voltage Controlled Oscillator||DCO||Digital Controlled Oscillator|
|LFO||Low Frequency Oscillator||Sub||Sub Oscillator|
|VCF||Voltage Controlled Filter||VCA||Voltage Controlled Amplifier|
|Velocity||As with a piano, the harder you hit a key, the louder the sound, unlike most organs which always produce the same loudness no matter how hard you hit a key.||Aftertouch||Pressing a key after you activated it. Channel Aftertouch, no matter which key, it will send a Channel message. Poly Aftertouch, sends the pressure per key instead of the whole channel.|
|Values for OSC, LFO, Filter, Envelope are per voice unless stated otherwise.|