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The Meter/Key View
The Meter/Key view lets you enter meter and key changes at measure boundaries. Meter and key
changes affect all tracks.
What Is Meter?
The meter—also known as the time signature—describes how to divide time into rhythmic pulses.
When you set the meter, you are specifying the number of beats per measure and the note value of each
beat. Common meters include:
•
2/4 (two beats per measure, quarter note gets a beat)
•
4/4 (four beats per measure, quarter note gets a beat)
•
3/4 (three beats per measure, quarter note gets a beat)
•
6/8 (six beats per measure, eighth note gets a beat)
The top number of a meter is the number of beats per measure, and can be from 1 through 99. The
bottom number of a meter is the value of each beat; you can pick from a list of values ranging from a
whole note to a thirty-second note.
The meter affects several things in SONAR:
•
Metronome accents
•
How measure, beat, and tick (MBT) times are calculated and displayed
•
How the Staff view is drawn
While SONAR in general allows meters to have up to 99 beats per measure, the Staff view cannot
display such measures. You will receive an error message if you try to use the Staff view with meters
exceeding its limit.
Internally, SONAR stores times as “raw” ticks or clock pulses. The
timebase
—the number of pulses per
quarter note (PPQ)—is adjustable, from 48 to 960 PPQ. If you are using a timebase of 120 PPQ and the
project file is in 4/4 time, then a whole measure equals 480 ticks. See “Setting the MIDI Timing
Resolution” on page 152 for more information about the timebase.
Usually the easiest approach to working with meter changes is to set all of them up before doing any
recording. Use the Meter/Key view or the
Insert-Meter/Key Change
command to add meter changes at
the desired measures.
What Is Key?
In musical terms, a key is a system of related notes based on the tonic (the base pitch) of a major or
minor scale. A key signature is a group of sharps or flats placed immediately to the right of the clef sign.
The key signature tells a performer that certain notes are to be systematically raised or lowered.
There are fifteen different key signatures—seven with sharps, seven with flats, and one without either.
The fifteen key signatures correspond to fifteen different major scales, and to fifteen different minor
scales (for example, the key signature for C major is the same as for A minor).
The key signature affects several things in SONAR:
•
The key signature controls how SONAR displays notes. In the Event List view and some dialog
boxes, SONAR converts the MIDI pitch number to labels like Db (D-flat in the key of C).
•
The Staff view uses the key signature to display notation correctly.
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