Keywords: Blue, Csound

Rotate Processor
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### Rotate Processor

parameters: noteIndex

The RotateProcessor rotates the order of the notes, making the noteIndex the first note. For example a noteIndex of 2 means "make the second note of the notes generated the first, shifting the first note to the end". With a noteIndex of 3, the following score:

    i1 0 2 1
    i1 2 2 2
    i1 4 2 3
    i1 5 2 4
    i1 6 2 5

will become:

    i1 0 2 3
    i1 2 2 4
    i1 4 2 5
    i1 5 2 1
    i1 6 2 2

As the third note now becomes the first. If a negative number is given, the number will count backwards as to what note should now become the first note. With a noteIndex of -2 (meaning, "Second note from the end"), the following score:

    i1 0 2 1
    i1 2 2 2
    i1 4 2 3
    i1 5 2 4
    i1 6 2 5

Will become:

    i1 0 2 4
    i1 2 2 5
    i1 4 2 1
    i1 5 2 2
    i1 6 2 3

Start times of notes are all modified such that the notes that are pushed to the end of list will start at the end time of the last note before it. For the above examples, the duration of the note list ast a whole did not change at all. However, when there are overlapping notes as in the following example, where note index of -3 was used:

    i1	0	5.0	0	4
    i1	2	5.0	1	4
    i1	4	5.0	2	4
    i1	6	5.0	3	4
    i1	8	5.0	4	4
    i1	10	5.0	5	4
    i1	12	5.0	6	4
    i1	14	5.0	7	4
    i1	16	5.0	8	4
    i1	18	5.0	9	4

The resultant scores duration has changed as shown below:

    i1	0.0	5.0	7	4
    i1	2.0	5.0	8	4
    i1	4.0	5.0	9	4
    i1	9.0	5.0	0	4
    i1	11.0	5.0	1	4
    i1	13.0	5.0	2	4
    i1	15.0	5.0	3	4
    i1	17.0	5.0	4	4
    i1	19.0	5.0	5	4
    i1	21.0	5.0	6	4

Please be aware of this behavior when using this NoteProcessor with scores that have overlapping notes.

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