Alesis ADATEDIT User Manual

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Chapter 10

The Event Editor

This chapter will explain how different types of Midi data – called Midi Events - can be edited in text form in the Event List. This is ideal of very porecise manipulation of data.

10.1 Midi Events

The term Midi Event refers to a complete Midi data word, made up of a status byte and usually one or two data bytes.

For example, a note,comprising note number(pitch) andvelocity (dynamic value), is a Midi event. It is important not to confuse this with the “byte.” A byte has a single data value, and is therefore only a part of a Midi event.

The Event List displays events in text format, so that each value can be easily viewed, and edited.

10.2 Opening the Event List

To open the Event Editor, select Windows >Open Event List from the main menu bar. If a sequence is selected in the

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Arrange window, Adat Edit will automatically try to display the selection’s contents in the Event Editor.

To open the Event List for a sequence in Windows, doubleclick on the sequence with the right mouse button . On the Mac, hold down the O key, whiledouble-clickingthe sequence. Different Event Lists can be opened for multiple sequences.

10.3 Standard Tools

The Event Editor window contains some standard tools similar to those in the Arrange window: The Catch and Link buttons, the Toolbox, and the Edit, Function,and View menus are essentially the same as in the Arrange window.

Hiding the Parameter Area

The Parameter Area consists of various controls, and is located on the left side of the Event List. The Parameter Area can be hidden to make more room for the Event List display. To do so, select View >Parameters from the local menu bar, to hide it.

 

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Event List Display

Repeating the operation will toggle the Parameter Area back into view.

10.4 Event List Display

The text display of Midi events is advantageous because the various parameters of a Midi event can be manipulated quite easily. Also, only the Event Editor is the only place in Adat Edit where non note events, such as controllers and pitch bend, can be edited.

Different Types of Events

The Event List is a table with six columns. As has already been explained, Adat Edit not only saves event data, but also the position and length of the data, which is displayed in the list.

Every Event List starts with the line “Start of List” and ends with “End of List.” These two lines serve simply as guides, and cannot be changed.

Midi Out

Engaging the Midi Out button causes events that are clicked on in the list to be sent to the tone generator.As you change values in the list, you will hear the effect on the data as you go.

Sometimes it may be easier to turn off the Midi Out button,

Tip

e.g., when Pitch Bend or Control Change events are being

 

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The Event Editor

processed. In these cases, listening to the material would not be of much use.

10.5 Scrolling the Event List

There are several ways to move through the Event List.

Current Song Position

The current Song Position is marked in the Event List by an arrow. The events will scroll by, so that the arrow will always be pointing to the event that occupies the current Song Position.

Song Position

Scroll Arrows

There are two scroll arrows located in the upper right portion of the parameter Area. By clicking on these arrows, the contents of the Event List can be moved either up or down. This will transmit events, ans they are highlighted, if the Midi Out button is engaged. If you click on a scroll arrow while holding down the mouse button, the program runs through the list quickly in either direction.

Instead of clicking on the arrows, the IandMkeys can be used.

 

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Selecting Events

Scrollbars

The scrollbars can also be used to scroll through the list. When you navigate therough the list this way, the events will not be output, even if the Midi Output button is activated.

10.6 Selecting Events

Selecting events in the Event List is done using the same selection techniques outlined in Chapter 4 Operation on page 83. Here is a review of the most important techniques:

Single Event

Click on any part of a particular line

 

in the list to select an event. If you

 

click on another event, the first

 

event will be deselcted, and the new

 

one selected.

Block

Click on the first event in the block.

 

Hold down the çkey (Windows)

 

or the Okey(Mac), and click on the

 

last event in the block. As long as

 

you hold down the key, you can keep

 

extending the block. You may also

 

select contiguous blocks of events

 

by rubber band selection. Click-hold

 

with the mouse just above and to the

 

left of the first event in the desired

 

block, and drag a rubber band over

 

all the events to be selected.

Scattered Events

Click on the events while holding

 

down the Skey.

Entire List

From the local menu, select Edit >

 

Select All.

Reverse Selection

Select Edit > Toggle Selection.

To cancel a selection, click in the small white gap between the List, and the Parameter areas:

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Click here to cancel the selection

10.7 Structure of the List

The order of parameters in the List is the same for all events, and is displayed along the top line of the Event List, just underneath the local menu bar.

Position

This refers to the starting position of an event in a song. This is displayed in the same four digit numerical format used elsewhere in Adat Edit.

Status

This column indicates the type of event. This is sometimes rerred to as the “Status Byte”. It might be a Note,Controller,Aftertouch event, etc. More information about this can be found in thesection Event Types on page 209.

 

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Structure of the List

Channel

This is the Midi channel of the event. All events that Adat Edit shows in the Event Editor l have defined Midi channels. Normally, this will be the channel that the Midi controller that transmitted the events was set to. No matter what channels the individual events in a sequence are set to, they will be “forced” out on the channel of the track instrument during playback, so you usually don’t need to worry much about the channels of the individual events. If the track channel is set to All, then each event will be sent on its own channel.

One way that the individual event channels are commonly used, is to control polyphonic voice assignment in the Score editor (see Chapter 12 The Score Editor on page 231).

Num (1. Data Value)

This is the first data byte in the Midi event. Its significance is dependent on the type of event. For example, with a note event, this byte represents the Pitch of the note. More about this can be found in the sectionEvent Types on page 209.

Val (2. Data Value)

As has already been mentioned, this is where the second data byte is assigned. For a note event, this byte represents the Velocity. More about this can be found in the sectionEvent Types on page 209.

Length/Info

For note events, the duration (length of the note is displayed in this column. A text description of controllers is displayed in this column, as appropriate. This is explained in more detail under section Event Types on page 209.

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Display of Length

In the Length/Info column, you may display note lengths in one of two ways. The typical way is to show length as duration from the beginning of the note.The length shown has no relationship to where in the song the note ends, just how long it is relative to the start of the note.The other option is to display the length as an absolute position in the song. This is the point along the timeline of the song that the note will end. To acti-

vate this mode, select View > Length as absolute Positionfrom

the local menu.

Example:

The diagram above shows length as duration from the start of the note. Below, the same event, showing Length as absolute Position:

10.8 Event Type Buttons

There is a row of buttons in the Parameter Area to the left of the Event List. These serve two functions:

as a way to filter the view of various event types.

for inserting events.

How these buttons behave, depends on which tools you use to click on them..

View Filter

The View Filter hides certain event types in the List Display. This is particularly useful when you want to work only with a particular type of event. Hidden events are still present in the sequence, and they will be sent if you engage playback with the

 

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Event Types

view filter on, they are simply hidden from view for ease of editing.

Click on the corresponding symbol with the arrow tool in order to show or hide the respective event types.

The selection commands in the Event Editor only operate on the events that are visible in the Editor. For example, to easily select and delete all controlller events,, turn off all event types except for Control Change, select Edit > Select All, and then press thekey (also see the sectionPracticing on page 221).

Inserting Events

To insert an event into the sequence, click on the appropriate button with the pencil tool. The event will appear in the list, at the current song position. In the Windows version, you may also insert events by clicking on an Event Type button with the right mouse button.

10.9 Event Types

Note

A note event is made up of the following data, (besides Midi channel information):

NUM

Midi note number, or pitch. The

 

Midi sound range reaches from C - -

 

2(0) toG8 (127), note number60 is

 

C3.

VAL

Velocity value from 0 to127, which

 

represents the force with which the

 

key was struck.

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Length/Info

Note length. Midi makes a distinc-

 

tion between the Note On and Note

 

Off commands. Adat Edit displays

 

them as single note event. The

 

format of this display depends on

 

several factors, including the View

 

setting, and the Display Format

 

setting.

Program Change

Program Change commands call up sounds or programs in Midi devices, such as synthesizers, samplers, or effects units..

NUM

Bank Selectcommand. Most newer

 

devices have multiple banks of

 

sounds, each of which may contain

 

up to 128 programs. If you don’t set a

 

value for this field, only sounds

 

within the currently selected bank of

 

the Midi device will be accessible.

VAL

A program number between 0 and

 

127. This number calls up a specific

 

memory location within the current

 

bank of the Midi device.

In the Tutorial Song, the program changes for GM sound modules are configured in the “GM Setup” sequence.

Tip

Pitch Bend

“Pitch Bend” eventswill vary the pitch of any notes playing on the same channel. Most synthesizers have a PitchBend wheel, or other controller for generating these events.

 

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