Author Archives: grantb4

New MTG Kawai R100 ROM Switcher

Posted on August 22, 2013 by grantb4

As you may have seen in my previous post, my Kawai R-100 Drum Machine came with a 3-EPROM “soundswitcher”. Since this is no longer available, I thought I would make my own. It’s not an exact clone of the Drumware … Continue reading →

Posted in Kawai R100 | Tagged | 5 Comments

Kawai R100 Soundswitcher board by Drumware Inc.

Posted on July 22, 2013 by grantb4

Here are some photos of the ROM switcher board in my Kawai R-100 Drum machine. The expansion board is dated 1987. My unit contains three 4Mbit mask ROMs: MN234000KAA, MN234000KAB, MN234000KAC I think these ROMs are the original R100 and … Continue reading →

Posted in Kawai R100 | Tagged | 3 Comments

Yamaha DX7 SuperMAX is in!

Posted on July 13, 2013 by grantb4

Great expansion and feature upgrade for the beloved DX7.

Posted in Yamaha DX7 | Tagged , , | 5 Comments

NEW Keyboard for SCI Pro One!

Posted on March 18, 2012 by grantb4

A long time ago I ordered a new 37-key Doepfer keybed and cable from in the USA. In fact I think Doepfer gets them from in Europe so there might be a better way to obtain one. The new keybed … Continue reading →

Posted in Pro One CPU | Tagged , | 104 Comments

MIDI Jack mounting

Posted on October 21, 2011 by grantb4

I have received some photos from users showing off their TurboCPU+MIDI installations, but don’t have them at hand right now. What I do have is an interesting photo from the old Oberheim DX or DMX that shows yet another way … Continue reading →

Posted in Pro One CPU | Tagged , | 2 Comments

USB 5 1/4″ Floppy Drive

Posted on April 19, 2011 by grantb4

I know it sounds off-topic, or that I have a fetish with all things vintage, but the reality is that a lot of my EPROM data and other files were kept on 5.25″ floppy disks back in the 80’s. Getting … Continue reading →

Posted in Uncategorized | Tagged , , , | 11 Comments

MIDI Control Surface for Pro One

Posted on July 27, 2010 by grantb4

I just ordered a Behringer BCF2000 MIDI Control Surface and will be looking at creating a template that maps all the changeable parameters to the knobs buttons and sliders. Hopefully there are enough controls on this unit. I wanted the … Continue reading →

Posted in Pro One CPU | 2 Comments

MIDI to CV, Pitchbend and More

Posted on July 5, 2010 by grantb4

Today I did some further experiments on the next little improvement to the MTG Turbo CPU for the Sequential Circuits Pro One: MIDI-to-CV. I’ve acquired a quad DAC (D/A or digital-to-analog converter) board that can be very easily hooked up … Continue reading →

Posted in Pro One CPU | Tagged , | 9 Comments

MTG “Turbo” CPU for Sequential Circuits Pro One

Posted on June 29, 2010 by grantb4

What’s with the “turbo” you ask? Well my marketing persona determined that “replacement” CPU was not suitably catchy. I guess that was my engineer persona at work.  But turbo actually does mean something here. As in “faster” and “more”. The … Continue reading →

Posted in Pro One CPU | Tagged , | 3 Comments