HX3.5 DSP Updates

Preliminary

While organ sound generation is done entirely in hardware (FPGA), the HX3.5 board uses an additional Digital Signal Processor (DSP) for reverb effects (EFX) and General MIDI voice generation. With an extended HX3 licence, 128 GM sounds are installed as a so-called soundbank. Up to two soundbanks can be installed at a time; a second soundbank may contain additional, more sophisticated instruments (with same MIDI GM bank and program numbers) which replace the instruments in first soundbank.

At this time, the DSP firmware and DSP soundbank(s) cannot be updated by SD Card; use USB connection to PL3 or HX3.5 instead. Please follow instructions below carefully.

Update by USB

HX3 DSP Update Application

In USB firmware/soundbank update mode, HX3.5 cancels the "MIDI over USB" mode and registers as a DFU-capable device. An updater application named "DreamDFU.exe" (Windows OS only) handles all further USB communication.

To update the DSP firmware, proceed as follows:

• Attach FTDI serial cable to HX3.5 PL19
• Attach USB cable to HX3.5 Board. PC should recognize a USB MIDI device.
• Connect with HX3.5 Editor to FT232R cable. If successfull, HX3.5 should read parameters and will show actual values.
• Open HX3.5 Update/Finalize window and click "Start DFU". PC will deregister USB MIDI and recognize a DFU device instead.
• HX3.5 will show "DSP update (DFU)" on MenuPanel display.
• Start DreamDFU.exe and open DSP firmware file "HX35_5504-FW.dfu". DreamDFU.exe should show a window as seen in picture.
• Click "Update". A process bar will indicate update.