I'm doing reverb using 'reverbsc', controlling the level with
a knob on my keyboard.  Because there's almost no reverb
below a level of say 0.5, I used ctrl7 with a 'ramp' table to
use a bit more of the 0..127 MIDI range. Sort of like so:

  giRvbRamp ftgen 0, 0, 128, 7, 0, 20, 0.5, 108, 1	
  ....
  krevb ctrl7, 1, girvbcc, 0, 0.95, giRvbRamp
  arvbl, arvbr reverbsc gaoutL, gaoutR, krevb, 12000
  outs arvbl, arvbr

I was surprised to find that when I turned the controller fully up,
the reverb dropped to zero!

If I change the table size to 129, things work properly, but
I've done some other experiments, and if, for instance, I
separate the table lookup from the ctrl7, I don't need a
guard point:

	krevb ctrl7, 1, girvbcc, 0, 127
	krevb table krevb, giRvbRamp
	printks "krevb=%f\n", 1, krevb

works as expected.

Is this a rounding bug or something, or is there a good reason?

Thanks,

	-- Pete --

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