filter; a modification for external audio input; and some users have added a switch to control the filter slope, adjusting it from a 4 pole (24db/oct) to a 2 pole (12db/oct). It is also possible to install an additional EPROM containing the firmware of the EX800. That way it is possible to receive MIDI-sysex data, but keyboard-functionality will then be disabled. Before powering up the synthesizer users can select the firmware of choice by using a selective switch. The most recent modification to the Poly-800 family is the Hawk-800 Firmware upgrade which is both a hardware and firmware modification, radically updating the features and capabilities of the synthesizer. There is also the AtomaHawk-800 which adds software and MIDI control to the more popular hardware modifications. References External links Synth Museum Vintage Synth Explorer Yahoo! group for users and abusers of KORG POLY 800 and EX800 synths Korg poly800 resource info, sounds, pictures and mp3 demo New patches from AnalogAudio1 for the Poly-800 II P Analog synthesizers Polyphonic synthesizers