Introduction
This page lists the factory original internal voice and performance data and factory supplied data ROM cartridge voice and performance data for the Yamaha DX7s synthesizer. The lists include the original factory internal voices and factory supplied data ROM cartridge voices.
The following pages on this site also provide information on the Yamaha DX7s:
- How to replace the battery in a Yamaha DX7s
- How to restore Yamaha DX7s factory voice and performance data
- How to run the Yamaha DX7s internal diagnostics
Factory supplied ROM cartridge
The Yamaha DX7s factory supplied data ROM cartridge has four banks, which contain the following data:
Bank 1 (voice & performance memory):
- 64 voice memories
- 32 performance memories
- 2 micro tunings
- 1 system setup
Bank 2 (voice & performance memory):
- 64 voice memories
- 32 performance memories
- 2 micro tunings
- 1 system setup
Bank 3 (fractional scaling memory):
- Fractional scaling data
Bank 4 (voice & performance memory):
- 64 voice memories
- 32 performance memories
- 2 micro tunings
- 1 system setup
Banks one and four contain identical voice data, but bank one performances use cartridge voices and bank four performances use the synthesizer's internal voices. Bank four is a copy of the original factory installed internal voice and performance data; this can be used to restore the factory voices in a DX7s; instructions on how to do this are available on my How to restore Yamaha DX7s factory voice and performance data page.

Yamaha DX7s factory supplied data ROM cartridge
Factory original voice and performance data
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Yamaha TX802 compatibility
The Yamaha TX802 FM tone generator contains identical internal voices to the Yamaha DX7s. They match as follows:
- TX802 internal ROM preset voice bank A contains the same 64 voices as DX7s factory original internal / ROM Banks 1 & 4 voice data
- TX802 internal ROM preset voice bank B contains the same 64 voices as DX7s ROM Bank 2 voice data
The TX802 performance memories DO NOT match the DX7s performance memories, as the TX802 is a multitimbral device and the DX7s isn't.
If you need to restore the original DX7s voices and don't have a DX7s factory ROM cartridge, but do have access to a TX802, you could use the TX802 as a voice data source (though not performance data).
Data can be transmitted directly via MIDI between the TX802 and a DX7s (or DX7 / DX7II / DXII FD) without the need for any other device, but with the following restrictions:
The operating system of the TX802 doesn't provide the option of direct transmission of its preset ROM bank voices, either singly or in bulk format, to another DX or device that can store such data, nor does it provide the option of copying the entire contents of ROM banks A and B in one step to either a RAM cartridge or the internal memory bank of the TX802 itself. Instead, each voice must first be stored individually in each slot of a RAM cartridge or the internal memory, the contents of which can then be transmitted in bulk directly to other devices. Even then, the TX802 transmits voice data only in 32-voice chunks, not 64; the user must select from a menu which chunk to transmit (voices 1-32 or 33-64).
Some, but not all editor / librarian packages can access the ROM banks of the TX802, which can make the job easier. For example, Emagic’s 'SoundDiver', a discontinued editor / librarian for the Mac, is able to retrieve the ROM voices of the TX802 and either transmit them to the internal memory of any DX device, or store them in a cartridge inserted in the DX. 'DX Manager', a Windows editor / librarian by FM-Alive (www.fm-alive.com), supports Yamaha's 6 operator DX and TX series, including the DX7s and TX802.
For more information on restoring the factory voice and performance data see my How to restore Yamaha DX7s factory voice and performance data page.
My thanks to Brett Kaplan for providing this useful information on TX802 compatibility.
Feedback
I'm trying to build an on-line repository of information, specific to the Yamaha DX7s synthesizer. Please get in touch via my contact page with any of the following feedback:
- Requests for additional specific Yamaha DX7s information
- Any errors or omissions in the information provided above
- Any specific Yamaha DX7s information you think may be of use to others