Simulating a TPO
How the MIDITZER simulates a TPO
Before we can discuss the Miditzer you must have at least a basic understanding of the components of a TPO and how they relate to one another. If you have never seen or played a TPO your first encounter with all of the tabs, buttons and keys will be somewhat intimidating and overwhelming. Though it may seem confusing at first things are actually arranged quite logically.
The objective of the first part of this document is to familiarize you with the elements of a TPO and their relationship to one another. If you have played an electronic or a classical organ some of these elements will already be familiar to you. However, there are differences. The experienced player can review the portions of this section that are of interest. The novice should read the entire document. Once you understand TPO elements and the relationship between them, you will have an understanding of the terminology used to describe Miditzer.
There are a number of elements that makeup a TPO that are implemented in Miditzer and these must be understood before Miditzer functions will make a great deal of sense. Here is an inventory of components to be discussed:
The Keyboards and Pedalboard
Almost all organs have more then one keyboard. One of these keyboards, with the keys arranged similarly to the piano style keyboards, is a large keyboard played with the feet and is called the pedalboard. The piano like keyboards played with the hands, are referred to as manuals.
The above Organ is the one used as a prototype for the Miditzer. It has two manuals of 61 keys each. Their range is from two octaves below middle C to three octaves above middle C. The blue arrow points to middle C. When a key is depressed a tone will sound if one or more stops are engaged. The keyboards or manuals in two manual organs are named:
The Solo manual is sometimes referred to as the Upper manual. The Accompaniment manual is sometime referred to as the Lower manual.
The screenshot above shows the Miditzer’s virtual console and indicates the manuals that correspond to the TPO’s manuals. The designation for the Accompaniment Manual is abbreviated ACCOMP on the organ and in MIDITZER.
The Pedalboard is situated below the organ manuals and are played with the feet. Green arrow in the Miditzer screen shot. The pedalboard in not visible in the above picture of the TPO. The following picture shows a pedalboard.
The pedalboard on a TPO and Miditzer is 32 keys long beginning two octaves below middle C. The pedal boards on electronic organs may be shorter consisting of either 25 or on smaller organs 13 pedals.
Once the Miditzer is installed, the manuals are played in any of three different ways.
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