Korg POLYSIX M Owner's Manual
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Korg POLYSIX M Owner's Manual

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KORG POLYSIX
A MIDI Retrofit Kit for the KORG POLYSIX
Owner's Manual
"Korg USA proudly announces the PS6-MRK MIDI Retrofit Kit for the Korg Poly-6 Synthesizer.
Thanks to modern software/hardware technology, a great classic analog synthesizer, the Korg Poly-6, has now
been upgraded with one of the most advanced and comprehensive MIDI Retrofits ever devised for a pre-MIDI
synthesizer.
With MIDI, your Poly-6 can now join the MIDI revolution, easily connecting with other MIDI synthesizers,
expander modules, sequencers, drum machines, personal computers and more ... " - so far the original text of the
MIDI retrofit kit produced by Korg in 1986. This has now come true once more with the present retrofit kit designed
by Ricard Wolf (Sweden) and Johannes Hausensteiner (Austria).
• Comprehensive MIDI implementation:
Note number, bend and mod wheels, pedals, arpeggio clock, program change and program dumps.
• Memory expansion to 128 programs
• Individual parameter update in realtime via MIDI
• A number of other enhancements such as sustain pedal, edit recall and arpeggiator MIDI sync.
Polysix M - MIDI-upgrade for the Korg Polysix:

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  • Page 1 ... " - so far the original text of the MIDI retrofit kit produced by Korg in 1986. This has now come true once more with the present retrofit kit designed by Ricard Wolf (Sweden) and Johannes Hausensteiner (Austria).
  • Page 2 Features MIDI IN functionality: note on, note off, all notes off, bend wheel, mod wheel, program change, sustain pedal, chord memory pedal, arpeggio switch, MIDI clock, start and stop (for the arpeggiator), sysex program dump, mode messages, active sensing. MIDI OUT functionality: note on, note off, all notes off, bend wheel, mod wheel, program change, sustain pedal, chord memory pedal, arpeggio switch, sysex program dump, active sensing.

  • Page 3: Chord Memory

    Connections Rear panel MIDI jacks: 1) MIDI IN Connect to MIDI Out of other synthesizer, computer, etc. 2) MIDI OUT Connect to MIDI In of other synthesizer, computer, etc. 3) MIDI THRU MIDI Thru delivers a copy of the signal received at MIDI In. 4) VCF fcM IN The VCF fcM IN jack can act as a modulation pedal.
  • Page 4 2) NEW CONNECTORS On the rear panel of the Polysix M there are three DIN connectors on the left hand side of the panel (rear view). From left to right these are MIDI THRU, MIDI OUT, and MIDI IN. (This order is employed by most manufacturers.) All data sent to the synthesizer is received via MIDI IN and all MIDI data that the synthesizer transmits is sent via MIDI OUT.

  • Page 5: Edit Recall

    To store the program in group 1, program A1 instead: (1) Press WRITE. WRITE starts flashing. (2) Select memory group 1 by holding MANUAL and pressing 1. 1 starts to flash indicating memory group 1. (3) Release MANUAL. (4) Press A to select bank A. (5) Finally press 1 to store the program.
  • Page 6 6 keys to be pressed always be heard so as not to ’lose’ any notes? In many cases this is set by the manufacturer of the instrument and cannot be changed. The Polysix M however offers the possibility of adjusting the key assign mode to suit the style of music and playing.

  • Page 7: Sustain Pedal

    The greatest omission from the original Polysix is without doubt the lack of a sustain pedal input. This has been corrected in the Polysix M. The pedal connected to the CHORD MEMORY input on the rear of the instrument can function either as a sustain pedal or as a chord memory pedal.
  • Page 8 MANUAL instead of TO TAPE to start the dump. In order to load back program data via MIDI it is only required to transmit the data via MIDI to the Polysix M. Upon receiving the data it will be automatically stored in the internal memory.
  • Page 9 9) MIDI OUT PARAMETERS To set the MIDI OUT parameters press POLY in tape enable mode. POLY will light up indicating that the MIDI OUT parameter mode has been selected. The following parameters are available: A) MIDI FILTER LEDs A..D indicate MIDI filters. MIDI filters inhibit certain MIDI data from being transmitted. The following filters are available: A - note data (note on/note off/all notes off) B - wheel data (bend and mod wheels)
  • Page 10 When omni mode is off (WRITE LED is off) MIDI data is only received on the channel indicated by 1..8. Note that local and omni modes can be controlled via MIDI using the LOCAL and OMNI MIDI commands (see the Polysix M MIDI implementation). D) MIDI IN CHANNEL The MIDI IN channel is indicated and selected in the same manner as the MIDI OUT channel.

  • Page 11: Test Mode

    This mode is used to check the CV DAC and is not described in the service manual. In the Polysix M both these modes have been merged into one which performs both tasks. The test mode is started in the following manner: (1) Enter tape mode by switching the TAPE switch to the ENABLE position.
  • Page 12 17) Individual Parameter Update Newly recognized MIDI commands allow for individual parameter update in realtime: MIDI Controller CC06 (DATA entry) MIDI Controller CC96 (DATA increment) MIDI Controller CC97 (DATA decrement) MIDI Controller CC98 (Non Registered Parameter Number, fine) MIDI Controller CC99 (Non Registered Parameter Number, coarse) A) Use of NRPN Paramter selecting is done by MIDI controller CC98/99 (NPRN).
  • Page 13 PolySixM PC based editor There is also an editor for PolySixM. It runs on any PC under DOS. For MIDI connection to PolySixM you need a MPU-401 (UART mode) compatible card. To invoke the editor simply type: P6 [o] ... with no option the editor defaults to MPU-401 card with option ’o’...
  • Page 14 DOS session. A) Raw SysEx file format (default extension .SYX): - sysex header: Start of Exclusive Manufacturer ID Korg n .. MIDI channel number g .. patch group: (0 .. all groups) - patch data: 16 bytes patch data * 32 (one group only);...
  • Page 15 5) Edit buffer: The edit buffer consists of 16 bytes with the following layout: Fourteen bytes analog parameters: offset Parameter Effects Speed/Intensity VCF Cutpff Frequency VCF Envelope Intensity VCF Resonance EG Attack EG Decay EG Sustain EG Release VCF Keyboard Tracking Pulsse Width / PWM Depth PWM Speed MG Frequency...
  • Page 16 6) Switch parameter values: As the values of the switch parameters are not always what you would expect the values are given here for reference: Parameter Value VCO Octave 16’ 8’ 4’ 2’ * VCO Waveform SAW+PW ** SAW+PW+PWM * Sub Oscillator 1 Oct dn 2 Oct dn...
  • Page 17 Modifications 1) GENERAL In order to make the MIDI retrofit work some modifications have to be done to several modules of the Polysix. There are additional modifications which are not related to MIDI. Some of them are mandatory, some of them are optional.
  • Page 18 2) MANDATORY MODIFICATIONS A) On KLM-366: Enable voice gates in tape interface mode: • Cut pcb trace IC4/pin1 to via (component side). • Connect IC4/pin1 to IC4/pin16. Separate UNISON LED from unison detune function: • Remove R118 (10k). • Connect IC5/pin13 to IC2/pin14. •...
  • Page 19 C) On KLM-369: Feed the control voltages from the wheels into the multiplexer for A/D converting: • Remove R16 (430k) and J4 (0 Ohm). • Cut pcb trace to IC2/pin2 directly at pin2 (solder side). • Cut pcb trace to IC2/pin4 directly at pin4 (solder side). •...

  • Page 20: Optional Modifications

    3) OPTIONAL MODIFICATIONS Besides MIDI there are following features on the MIDI pcb: A) White Noise generator (programmable level): • Solder the free ends of cable drawing no. PS 6M 00 05 003 to the "upper" end of R150 of each unit on KLM- 366 (refer to drawing).
  • Page 21 4) MOUNT THE PS6M MIDI PCB INTO THE POLYSIX When you have finished all modifications it is time to reassemble your Polysix and mount the heart of your MIDI retrofit kit: the PS6M MIDI pcb. (1) Reassemble the control panel (jack panel assembly, KLM-376, KLM-369, KLM-370, KLM-371, power cord), put the lid in its place and connect all cables.

  • Page 22: Transmitted Data

    POLYSIX-M V2.1 MIDI IMPLEMENTATION (18.Mar.2000) 1) TRANSMITTED DATA (A), (B), (C), or (D) means that the messages are only transmitted when the respective output filters are enabled: (A) - note data (B) - wheel data (C) - program change (D) - sustain pedal / chord memory pedal nnnn is the midi output channel;...

  • Page 23: Received Data

    B) System Exclusive: 1111 0000 System Exclusive 0100 0010 Korg ID 0000 nnnn Device ID (MIDI channel) 0ccc cccc Command Code (see below) 0ddd dddd <data> 1111 0111 End of Exclusive Note: The only system exclusive messages transmitted are program dumps. These may be initiated by: A) Pressing MANUAL in TAPE MODE when neither POLY, UNISON, CH MEM is lit.
  • Page 24 A) Voice Messages: 1000 nnnn 0kkk kkkk 0xxx xxxx Note off (A) Note number Rel. velocity (ignored) 1001 nnnn 0kkk kkkk 0vvv vvvv Note on/off (A) Note number Vel.(0=off,all othr=on) Note: The Polysix-M will respond to the entire MIDI key range 0..127; however notes generating higher pitches than 4’...
  • Page 25 B) System Exclusive: 1111 0000 System Exclusive 0100 0010 Korg ID 0000 nnnn Device ID (MIDI channel) 0ccc cccc Command Code (see below) 0ddd dddd <data> (commands 10h..14h have no data) 1111 0111 End of Exclusive The following command codes are recognized:...
  • Page 26 C) System Realtime 1111 1000 MIDI timing clock Note: The timing clock is for the arpeggiator. The arpeggiator trigger is generated by dividing the midi clock by the required clock division ratio. The midi clock divider operates even when midi sync is not enabled, allowing the arpeggiator to synchronize properly even if midi sync has not been enabled since the reception of the last START command.

  • Page 27: Midi Implementation Chart

    3) MIDI IMPLEMENTATION CHART [ 6 voice polyphonic synthesizer Date : 18.Mar.2000 Model PS-6M MIDI Implementation Chart Version : RW/JH2.1 +----------------------------------------------------------------------+ Transmitted Recognized Remarks Function ... | |-------------------+----------------+----------------+----------------| |Basic Default | 1-16 | 1-16 | memorized |Channel Changed | 1-16 | 1-16, all ch |-------------------+----------------+----------------+----------------| Default...

  • Page 28: Revision History

    Revision History 1) CREDITS I want to thank Ricard Wolf from Sweden for doing excellent work in both hardware and software and making the results available for others. 2) REVISIONS 30.Oct.1999 Firmware: RW1.1 10.Sep.1989 Hardware: PS6M.0A 17.Oct.1999. 25.May 2000 PolySixM ROM RW/JH V2.1: 18-Mar-2000 - MIDI control over single parameters - Reception of MIDI controller...

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