Hi Daniel,

By doubling, I just mean to duplicate the notes one instrument plays by having another play them, too, perhaps an octave higher or lower. There is an example in measure 18 of "Cats", where the piano right hand is doubled two octaves lower by the left hand.

What I was thinking when I speculated about doubling the bass, perhaps starting at measure 24, was that an instrument that produces a sustained tone might enhance the mysterious quality. The only instruments I can think of, off hand, that would play the lowest notes are the double bass, the tuba and the contra bassoon. An organ might be another possibility.

It doesn't hurt to experiment, all of which might lead you back to where you are with the piece right now, but it can be fun.

all best,
mgj