What people mostly worry about when it comes to "organs and MIDI" is sound quality. However, MIDI actually has little to do with sound quality. MIDI is simply a system of communication that permits communication between electronic musical devices.

MIDI, however is able to control things that do make sound. It can communicate with "real-pipes" or "high quality digital samples". In some cases it communicates with both like it does in a hybrid organ.

This is a great page on Audio/MIDI interface compatibility with Vista done by Cakewalk (Twelve Tone Systems)




Note that not all interfaces work with a full, 64-bit version of Vista. Many only work with 32-bit so far.

The Microsoft Visual Basic Virtual Machine (MSVBVM50.DLL) file is used to run native 32-bit visual basic applications on 64-bit machines.

Some 64-bit users report problems with installing MCU Config, and CMK Config on their systems. 

The file should be included in your hardware installation disk from Classic Organ Works. The file is zipped and is called "msvbvm50.zip"


To download it directly click here. There is a tutorial and unzip package there (they want some $$ for the unzip package but you can use whichever one you own. There are lots of free ones out there)

You can also go directly to Microsoft "msvbvm50.dll" file click here.


If you downloaded msvbvm50.dll directly, with no "exe" install package, you should follow the steps below. The file needs to be added to your file registry. 


If the DLL does not register automatically, the following steps will register it.

  1. Copy the expanded DLL in C:\Windows\System32.
  2. Using the RUN option in the start menu, run



I can play every keyboard. However the CMK config software cannot detect the keyboard (Retrying... window appears, and nothing happens after that).


CMK config needs both the MIDI IN and OUT connected to the computer. It sounds as if you only have the MIDI IN connected. After everything is configured, you can remove the MIDI OUT if you wish.

Answering this question properly will ensure you get a great organ. Neglecting any of these components will be like taking away one leg of a three-legged stool.

1) Solid Console Craftsmanship

A solid console is one of the most important parts of your organ. It is one of the most visible parts of your organ. It is also a large part of your investment. (should be around 1/3 of the total money spent) Realistically it should be an financial "asset". Ideally, if you ever decide to upgrade, it would be great if you could save that cost and use the same console.

In addition, good components feel good to play. Reliable components let you concentrate on creating great music instead of compensating for "that button that doesn't work anymore".

2) Quality Sound Generation

Quality sounds give you something you can amplify with confidence and pride. Sound quality has become incredibly good. The best sample and modelling technologies are around and are available to organbuilders. We use them with solid consoles and powerful sound systems to create exciting instruments.

3) Visceral Theatre Sound System

One of the major problems for digital is to create the visceral, gut-shaking movement of air that a 32 foot pipe can produce. Coupled with that is the fact that every individual pipe is a "sound generator". So if you have 4 ranks going, with a 5 note chord, you have 20 sources of sound. You cannot recreate that with the puny stereo output (2 sources) of most digital organ "packages" that are sold to churches. The good news is that as the sounds get higher, less air has to be moved. Therefore it is much easier for digital to produce the same sonic results as a pipe organ as the stops get smaller.
However, with some thoughtful design and some cutting edge technology it is now possible to produce sounds and an experience that can satisfy even a true organ connoisseur; even a 32ft stop!

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