Author Archives: grantb4

MIDI Patch Changer: Set Patch Range Hack

Posted on November 23, 2014 by grantb4

Here is a relatively easy hack to let you change how the MPC keypad display MIDI Program Change numbers: as 1-to-128 or 0-to-127. This setting is made available as kind of a “hidden” feature. Hidden in the sense that you … Continue reading →

Posted in MIDI Patch Changer | 1 Comment

A Plethora of DX7 Backlit LCDs

Posted on August 3, 2014 by grantb4

I had a chance to grab a bunch of LCD’s for the original Yamaha DX7 and picked up a variety of colors.  They are all really nice and look much better than my photography suggests.

Posted in Yamaha DX7 | 2 Comments

TurboCPU DAC/CV Option – New Parts Source?

Posted on June 25, 2014 by grantb4

I made an interesting discovery on the web today. There are a lot of companies making “Breakout Boards” and “SMT to DIP Adapters” but I’ve never found an assembled one for the MCP4728 DAC used in the TurboCPU’s CV/DAC option … Continue reading →

Posted in Pro One CPU | 3 Comments

Time for Kidney Transplant

Posted on April 25, 2014 by grantb4

Hey kids, I’m getting a new kidney.  Wish me luck!  Soldering and programming to resume as soon as I’m able, but I imagine that’s at least a few months away.  

Posted in Kidney Transplant, Medical Fun | 3 Comments

Pro One TurboCPU v1.32 – Again with the updates

Posted on April 14, 2014 by grantb4

Further refinements to both the firmware and PC software. The main changes are in the firmware and they are: When the Sequencer is driven by the MIDI clock with Seq Tie Disabled, the gate time is now 50%. Previously it … Continue reading →

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MTG TurboCPU+MIDI+CV v1.30 Beta Firmware and PC Software Available

Posted on March 1, 2014 by grantb4

I’m just finishing up the v1.30 firmware and a basic PC editor for the TurboCPU. This version will not be the shipping version for a while yet, but you can get your hands on in now if you are interested.  … Continue reading →

Posted in Pro One CPU | 2 Comments

MIDI Patch Changer Keypad – updates

Posted on February 13, 2014 by grantb4

There have been several major updates to the software and firmware for the MPC keypad over the past year. This latest software update (v3.22) fixes a minor bug you might encounter when using the Pre- or Post- Program Change arbitrary … Continue reading →

Posted in MIDI Patch Changer | 6 Comments

TurboCPU – Updates and Software

Posted on December 30, 2013 by grantb4

It’s been about two years since I touched the TurboCPU code.  I should have v1.20 ready soon. Here is what I have fixed so far: The envelope was not retriggering when you lifted one of two keys held down when … Continue reading →

Posted in Pro One CPU | 2 Comments

MTG R100 Builder – Kawai R100/R50 EPROM Builder Software

Posted on November 27, 2013 by grantb4

This software will enable you to create your own custom EPROMs (BIN files) for the Kawai R100 or R50/R50e legendary 12-bit drum machine/rhythm composers. In a nutshell you collect/create a bunch of WAV files, one for each of the 24 … Continue reading →

Posted in Kawai R100 | 22 Comments

Kawai R100 DGU Compression Exposed

Posted on November 11, 2013 by grantb4

Just a quick note to say that I have made some progress with the Kawai R100 12-bit compression encoding. What Kawai are doing here, near as I can tell, is storing the sound data in logarithmic format. This allows them … Continue reading →

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