D-2 Mock-Up

Several months ago, it occurred to me to try using pitch shift effects to obtain notes that are out of my range on tuba. Here's my first concerted effort at it:

The "D" Series: D-2

(score here)

If you've been to a C.o.S.T. performance, you've heard this piece before; it was one of the first flexibly scored pieces I wrote with that group in mind, and so far we've played it at every show. On top of the many things that intrigue me about flexible scoring, there's the fact that by using pitch shift, I can record the entire piece all by myself (I did use Sibelius for the snare drum part, but could always have a percussionist friend overdub it later). Obviously, sound quality suffers more as you move the pitch further, but all in all, it's a far more human way to hear a piece than MIDI playback through a notation program.

I played as much of the music in the written octave as I could, and played many of the higher parts down a fourth or fifth rather than an octave so as to minimize the total amount of pitch shifting necessary. This means that most of the middle parts do not consistently use the same timbre, but in this format, it doesn't matter much (long live flexible scoring). The biggest challenge is that pitch shifting up magnifies tremendously even the slightest flaws in articulation, and I sometimes found myself trying out a few different transpositions before finding one where the right notes responded the right way.

After pitch shifting where necessary, I applied Audacity's "Noise Reduction" effect and "Columbia LP" equalization (performing these three steps out of order causes the appearance of pops and clicks in odd places). I also did more than a little bit of editing, which considering that Audacity doesn't have a built-in crossfade feature, often worked better than it reasonably well should have without it. The result is far superior to previous overdubbing projects I've undertaken with GarageBand (a program I've officially lost patience with), but could still be improved, I think, even using free software and a bare-bones set-up. More to come.