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PPG | 390 Drum Unit


The PPG PRK is a velocity sensitive 72 key master keyboard to be used only with the PPG synthesizers.

The PPG PRK was created for a number of reasons; firstly many PPG owners wanted to have velocity sensitivity when using their PPG synths - the PPG PRK offers this.
Also the 'closer-to-piano-feeling' was something that musicians wanted at this time - the PPG PRK offers this as well.

The PPG PRK also offered optional voice boards to be inserted into the unit. 
This does not mean that the PPG PRK itself can create any sounds - but by inserting the optional sound cards you could send the information on these to the PPG Wave 2.2, PPG Wave 2.3 or PPG EVU.

The PPG PRK FD was the second and last master keyboard from PPG.

It still offered 72 keys (6 octaves), a nice velocity sensitive keyboard and resembled the original PPG PRK in many ways.
But the idea from the PPG PRK to include optional ROM sound cards was no longer available because of the included floppy drive.

It also included MIDI - and had one MIDI in and four MIDI outs. So you could control not only PPG Components with the PPG PRK FD - but also other MIDI devices.

The PPG PRK FD has a 5.25 inch floppy drive (hence the name FD = Flopp Drive) and could - unlike the PPG PRK - be used to load samples, sequences, programs and wavetables to other PPG components.

So a musician could sit back home in the studio creating music using the PPG Waveterm / PPG Wave 2.2, PPG Wave 2.3 and/or PPG EVU system - and could leave the PPG Waveterm back home when going on the road.

The PPG PRK FD uses the much faster Motorola 68000 processor as opposed to the Motorola 6809 used in the PPG PRK.


Model390 Drum Unit
Engine TypeDigital
Voices (max)8
Engine Detailed8 Bit Samples in Eprom
Key typeN/A
CV-gate8x Trigger in
Extra info2 made
Produced:1982 - 1982
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.

Manuals, patches etc.


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