JMSL Tutorial: JScore

JMSL Tutorial: JScore
Implementing your own Binary Copy Buffer Transform, part 2

We will implement a Binary Copy Buffer Transform that generates the morphological mean of the two aux sources. We implement a mutation function where
each resulting Note_n is the function of Aux1Note_n and Aux2Note _n
Specifically:

the pitch of the resulting Note_n = mean pitch of Aux1Note_n and Aux2Note_n
the duration of the resulting Note_n = mean duration of Aux1Note_n and Aux2Note_n

Note that this is a very simple mutation function, and you are encouraged to investigate Larry Polansky's exhaustive listing of morphological mutations

Try It

In the scoreframe opened by this applet,

select and copy the melody in top staff to aux buffer 1
select and copy the melody in second staff to aux buffer 2
Select MutationMean from Transforms -> binary Copy Buffer Transforms menu
Click in the third staff and select Freeflow Paste. You will see four dotted 32nd notes (the dur mean) and four unaltered notes. The unaltered notes are there because the buffers were of unequal size.

Recall again that Freeflow Paste is appropriate here because the two sources came from different staves. Paste preserves measure and staff numbering, while Freeflow Paste simply pours resulting notes into one staff.

Source

View the applet source and mutation source.

You need a Java enabled web browser to view this applet

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  (C) 2000 Nick Didkovsky and Phil Burk, All Rights Reserved
  JMSL is based upon HMSL (C) Phil Burk, Larry Polansky and David Rosenboom.