Posted by Todd S. Malicoate on August 27, 2003 at 19:31:58:
In Reply to: Multiphonics posted by wil on August 27, 2003 at 15:32:58:
Try this exercise:
Play a root note in the middle of the staff (C works nicely on a CC tuba, or Bb on a BBb, etc.). Start by humming a multiphonic note a P5 above (should be fairly easy to start with) and listen for the resultant tone a M10 above the root - this will give you a nice major chord to lock in. Once you have this chord, move the multiphonic (hummed) pitch up to the M6 and listen for the resultant tone to move up a half-step (another major chord). Then go back to the P5, and then down to a tritone above the root (again, the resultant tone will move with you, this time to a m10 above the root for a diminished feel). Resolve back to the P5 to complete the exercise.
You can extend this to include going down to a P4 multiphonic as well. Listening for the faint resultant tone will help you really lock in the intervals. I seem to remember an article in Brass Anthology showing some hymn tunes written out as multiphonics - if you can find it, this would be a great way to work on those pesky intervals as well.