Type:
intvExpand: segment x integer -> segment
intvExpand: sequence x integer -> sequence
Call syntax:
intvExpand(segm,
int)
Description:
intvExpand returns the segment which is obtained
by augmenting every interval in segm by
int semitones (additive process); in this process,
rests are being ignored and the first note of segm
remains unchanged. Furtheron, primes (pitch repetitions)
are not affected by intvExpand.
Positive int values cause the intervals to expanded, negative values correspond to a reduction of the intervals. However, in the latter case, minor seconds are never further reduced, so that the interval directions are always being preserved. intvExpand is a atonal (chromatic) operation; consequently, all alteration information is discarded and the resulting segment contains only unaltered notes.
Example:
> seq:=[_/8 g1 h d2 g1 g2]
> intvExpand(seq,2)
Result= [ _/8 g1/8 cis2/8 fis2/8 a1/8 h2/8 ]
> intvExpand(seq,-2)
Result= [ _/8 g1/8 a1/8 ais1/8 f1/8 e&2/8 ]
> intvExpand(seq,-4)
Result= [ _/8 g1/8 g#1/8 a1/8 fis1/8 d2/8 ]
> intvExpand([c1/2 _ c/4 c c#],-1)
Result= [ c1/2 _/2 c1/4 c1/4 _ cis1/4 ]
> intvExpand([c1/2 _ c/4 c c#],+1)
Result= [ c1/2 _/2 c1/4 c1/4 _ d1/4 ]
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