Synth Museum

"Synthesizer preservation via research and education."


The Web SynthArk

K4

Kawai K4

K4

Released: 1989

MSRP: $1445US

Synopsis:

Refined K1 II with dual serial or parallel filters (and associated envelope generators and LFO) and weighted keys Architecture Class: Rompler.

Ebay Description:

The Kawai K4 is a 61 key (velocity and pressure sensitive) 16 voice multitimbral synthesizer, featuring four oscillators (202 samples), a drum kit, amplitude modulation, dedicated DIADSR volume envelopes for each oscillator, dual low pass digital filters, dual LFOs (saw/triangle/square/random waveforms), auto-bend, 64 presets, 32 multi-effects, and MIDI.

Physical

Form Factor Dimensions Weight Audio Input Audio Output Communication Port Control Input Control Output Switch Input Power
61 weighted keys H:88.5mm W:1020mm D:310.8mm 7.3kg no stereo MIDI IN OUT THRU no no sustain DC12V 500mA (5.8W) negative tip (PS121)

Interface

Compatibility Multitimbral Memory Program Memory External Storage External Programming UI Input UI Output
K4 K4r user:64 card:64 user:64 card:64 Program Card (DC-16) MIDI SysEx menu based LCD display

Architecture

Multitimbral Polyphony Unison Architecture
9 2xSource:16 4xSource:8 solo:1 no [DCO1+DCO2]->DCF1 [DCO1+DCO2]->DCF1+[DCO3+DCO4]->DCF2 [DCO1+DCO2]+[DCO3+DCO4]->DCF1->DCF2

Output

Effects Pan Modulator Volume Modulator Headphone
32 multieffects (reverb, delay, chorus, pan, flanger, overdrive) no MIDI-CC7 yes

Control

Arpeggiator Arpeggiator External Sequencer Sequencer Memory Sequencer External Continuous Program Change
no N/A no N/A N/A BendWheel ModWheel MIDIPitchBend MIDI-CC1 MIDI-CC7 MIDI

Keyboard

Key Pressure Chord Memory External Control External Sustain Key Scaling Velocity Curves
channel no MIDI pedal MIDI-CC64 +-8 EG-level:8

Sample

Stereo Sample Depth Sample Rate Sample RAM Sample ROM Sample Points Sample Trigger Sample Loop Sample Edit
N/A 16bit ? no ? N/A N/A N/A N/A

Source

Name Signal Class Waveform Octave Range Amplitude Modulator Harmonics Modulator Pitch Modulator Wave Assign Modulator
Source1 digital additive:96 samples:106 +-2 S1-EG Source2 AM:Source2 pressure Auto-Bend BendWheel Vibrato MIDIPitchBend no
Source2 digital additive:96 samples:106 +-2 S2-EG Source1 AM:Source1 pressure Auto-Bend BendWheel Vibrato MIDIPitchBend no
Source3 digital additive:96 samples:106 +-2 S3-EG Source4 AM:Source4 pressure Auto-Bend BendWheel Vibrato MIDIPitchBend no
Source4 digital additive:96 samples:106 +-2 S4-EG Source3 AM:Source3 pressure Auto-Bend BendWheel Vibrato MIDIPitchBend no
Drum1 digital same as source +-1 velocity no no no
Drum2 digital same as source +-1 velocity no no no

Filter

Name Signal Class IC Resonant Shape Frequency Modulator Resonance Modulator Shape Modulator
DCF1 digital DSP no low pass pressure key LFO velocity no no
DCF2 digital DSP no low pass pressure key LFO velocity no no

Envelope

Name Level Rate Loop Polarity Trigger Level Modulator Rate Modulator
S1-EG attack sustain delay attack decay release no no no pressure key velocity key velocity
S2-EG attack sustain delay attack decay release no no no pressure key velocity key velocity
DCF1-EG attack sustain delay attack decay release no no no velocity key velocity
S3-EG attack sustain delay attack decay release no no no pressure key velocity key velocity
DCF2-EG attack sustain delay attack decay release no no no velocity key velocity
S4-EG attack sustain delay attack decay release no no no pressure key velocity key velocity
Drum1-EG - decay no no no no no
Drum2-EG - decay no no no no no
Auto-Bend initial attack no no no velocity key

LFO

Name Waveform Delay Polarity Sync Delay Modulator Level Modulator Rate Modulator
Vibrato random saw:up square triangle no yes no no pressure MIDI-CC1 ModWheel no
LFO random saw:up square triangle yes yes no no pressure MIDI-CC1 ModWheel no
Rompler Models
K1 K1m K1r K1II K1rII PH50 PHm K4
K4r XD-5 KC10 XS-1 K11 GMega KC20 GMega-LX