Cool! I'll have fun playing with these examples. Thanks for the toot. ~Kyle
On Wed, Mar 18, 2009 at 3:38 AM, Frank Barknecht fbar@footils.org wrote:
Hallo, Frank Barknecht hat gesagt: // Frank Barknecht wrote:
inversion: That's a bit more complicated. Quoting Wikipedia:
Inverted melodies
When applied to melodies, the inversion of a given melody is the melody turned upside-down. For instance, if the original melody has a rising major third (see interval), the inverted melody has a falling major third (or perhaps more likely, in tonal music, a falling minor third, or even some other falling interval). Similarly, in twelve-tone technique, the inversion of the tone row is the so-called prime series turned upside-down. http://en.wikipedia.org/wiki/Inversion_(music)#Inverted_melodies
In inversion.pd this is realised by walking through the list with list-map, taking the difference between the current element and the previous element, then substracting this from the current element. The first element in a list is treated specially as it has no previous element (it's just copied).
Ah, sorry: The patch is correct, but my explanation is wrong. Here's an update:
In inversion.pd this is realised by walking through the list with list-map. The interval to use next is calculated by taking the difference between the current element and the previous element. This interval is substracted (not added, because we are "retro"-grading) from the previous note, the resulting note is stored for the next step and inserted into the result list. The first element in a list is treated specially as it has no previous element: it's just copied and used as the starting note.
Ciao
Frank
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