DX7mega128
Page 1 of 8
User Guide v1.30
www.musictechnologiesgroup.com
Preliminary
Yamaha DX7mega128 Expansion User Guide
* Welcome to *
* DX7mega128 *
1: Introduction
The DX7mega128
1
is essentially a “lite” DX7 S type expansion. It provides the
following new features:
MEMORY EXPANSION
4x memory expansion: There are now 128 patches
2
(what Yamaha calls "voices")
arranged in 4 banks of 32. Each patch is directly selectable by standard MIDI Patch
Change messages.
The Function Settings can be saved as a single global value or on a per-patch basis.
GLOBAL PARAMETERS
MIDI Transmit Channel: You can set the MIDI OUT channel from 1 to 16. (MIDI IN is
already settable in the Yamaha factory DX7 v1.8 firmware using button Function 8).
Local On/Off: You can set whether the local keyboard sounds the internal FM sound
engine (or not).
MIDI Receive in OMNI mode (receives on any/all channels).
PATCH PARAMETERS
Programmable Keyboard Zone: Each patch can utilize a settable active keyboard zone
(low key to high key) within which the local keyboard sounds the internal FM sound
engine per patch.
Programmable Patch Volume: Each patch can utilize a volume to even out the DX7
levels when changing patches.
Voice Stacking: You can stack and detune two or four voices of the same patch. You
then have a choice of 16x1, 8x2, or 4x4 polyphony. The detuning can provide chorus
effect and/or chording and/or octaves (for example).
BUG FIXES
Includes the fixes for the DX7 Fixed Frequency table bug and also includes the faster
boot.
[v1.30+] Hardware-selectable MIDI Velocity Offset fixes the stock DX7 velocity issue.
1
The information provided in this document is intended for informational purposes only and is subject to
change without notice. Information may be changed or updated without notice. We may also make
improvements and/or changes in the product(s) described in this information at any time.
2
In this document the term "patch" is used to denote a programmed sound. For some unknown reason back
in the 80's, Yamaha called these "voices". The typical use for "voices" these days is to indicate the degree
of polyphony (how many keys you can hold down at once and get sound for).
