DX7

After tuning each note it is possible to save the tuning by changing the RAM format to "scale mode" (button 20) and turning OFF the INTERNAL MEMORY PROTECT. Pressing STORE button while in the Scales Page, store the scale into any or all of the sixteen slots provided (buttons 17-32). Note that if you store your scale as "Scale 1" (button 17) everytime you turn off and on your DX7 this scale will sound.

More convenient is the ± semitone TUNING ADJUST button number 1 in the KEYBOARD PAGE. Here a semitone equals a numeric value 64. Therefore each increment equals 18.75¢.


	DX7, DX7IID, & DX7IIFD with Grey Matter Response E!

During the 1980s Grey Matter Response built the E! board for the Yamaha DX7 family of synthesizers. Starting with version 1.0 the E! increased the number of internal voices and improved MIDI implementation. Version 2.0 added the capability to tune any key to any pitch with >1/3 cent accuracy. Version 1.1 has three pages: 1. The Function Page 2. The MIDI Page 3. The Memory Page Version 2.0 has five pages: 1. The Function Page 2. The MIDI Page 3. The Memory Page 4. The Scales Page 5. The Keyboard Page
To get a 72 note equal temperament on a DX7 equipped with an E!, each note has to be tuned to the following table: C = 0000/4096 C +16.6 = .0057 C#-66.6= .0114 C#-50¢ = .0171 C#-33¢ = .0228 C#-16.6 = .0284 C# = 341.3 = .0341 C# +16.6 = .0398 D-66.6 = .0455 D-50¢ = .0512 D-33.3 = .0569 C#+16.6 = 0.626 D = .0683 D+16.6 = 0.740 Eb-66.6 = .0796 Eb-50¢ = .0853 Eb-33.3 = .0910 Eb-16.6 = .0967 300¢/Eb = 1024 Eb+16.6 = .1081 E-66.666¢ = .1138 E-50¢ = .1195 E-33.3¢ = .1252 E-16.6¢ = 1308 E = .1365 E+16.6¢ = .1422 F-66.6¢ = .1479 F-50¢ = .1536 F-33.3¢ = .1593 F-16.6¢ = .1650 F = .1707 F+16.6¢ = .1764 F#-66.6¢ = .1820 F#-50¢ = .1877 F#-33.3¢ = .1934 F#-16.6¢ = .1991 F# = .2048 F#+16.6 = .2105 G-66.6¢ = .2162 G-50¢ = .2219 G-33.3¢ = .2276 G-16.6¢ = .2332 G = .2389 G+16.6¢ = .2446 G#-66.6¢ = .2503 G#-50¢ = .2560 G#-33.3¢ = .2617 G#-16.6¢ = .2674 G# = .2731 G#+16.6 = .2788 A-66.6¢ = .2844 A-50¢ = .2901 A-33.3¢ = .2958 A-16.6¢ = .3015 A = 3072 A+16.6¢ = .3129 Bb-66.6¢ = .3186 Bb-50¢ = .3243 Bb-33.3¢ = .3300 Bb-16.6¢ = .3356 Bb = .3413 Bb+16.6¢ = .3470 B-66.6¢ = .3527 B-50¢ = 3584 B-33.3¢ = .3641 B-16.6¢ = .3698 B = .3755 B+16.6¢ = .3812 C -66.6¢ = .3868 C-50¢ = .3925 C-33.3¢ = .3982 C-16.6¢ = 4039
After tuning each note it is possible to save the tuning by changing the RAM format to "scale mode" (button 20) and turning OFF the INTERNAL MEMORY PROTECT. Pressing STORE button while in the Scales Page, store the scale into any or all of the sixteen slots provided (buttons 17-32). Note that if you store your scale as "Scale 1" (button 17) everytime you turn off and on your DX7 this scale will sound. More convenient is the ± semitone TUNING ADJUST button number 1 in the KEYBOARD PAGE. Here a semitone equals a numeric value 64. Therefore each increment equals 18.75¢.
NOTE: E! is no longer manufactured by GREY MATTER RESPONSE. Yamaha DX7 Resource Centre
The Microtonal Synthesis Website
72note.com	email you comments	April 21, 2003

DX7, DX7IID, & DX7IIFD

with Grey Matter Response E!