It was thrilling to be in touch yesterday with xenharmonic composer and LinnStrument owner, Carlo Serafini, who made me aware that the issue of the row offset interval on the LinnStrument had already been addressed, then have Roger Linn himself drop by to comment and clarify about this new functionality in the recent Xen-Arts article on the topic. The row offset interval has now been greatly expanded (although it is not documented as of this writing), from 0 to 16 MIDI Notes.
A most impressive virtuoso performance by Jeremy Cubert on the LinnStrument
Obviously this is very good news for xen-micro musicians and composers who might wish to map some larger equal temperaments with 4ths and 5ths between the key rows. With this increased row offset interval range, a maximum row offset value of 16 would accommodate 4ths up to ED2-39 (39 tone equal temperament) and 5ths up to ED2-28 (28 tone equal temperament).
Thinking more deeply – with some diagonal logic – about how various equal temperaments would map onto the LinnStrument keys, I wanted to see what would be the optimal row offset intervals for a small selection of ED2 microtunings (equal divisions of harmonic 2) that would enable the most ergonomic fingering of the available varieties of 7th chords, with the strict criteria of being able to have access to all of these intervals when playing across four adjacent key rows.
Let’s take a look at some of the the results found with my handy LinnStrument ergonomic ED2 microtuning mapping calculator. I think they are a rather interesting and inspiring glimpse into the possibilities of how the LinnStrument would work for microtonal and xenharmonic music performance.
On the first four rows I’ve used colors to indicate where the intervals (given in cents) would fall under the fingers for ED2-13, 14, 15, 16, 17, 18, 19, 22 and 23:
1/1 and 2/1 = Orange
3rds = Blue
5ths = Yellow
7ths = Green