Need to assign an order to 64 sound files in a node

Bob's icon

I've tried numbering them 1-64, with no luck.

How would I do this please?

b

Source Audio's icon

01,02,03 ...

metamax's icon

(0 to 63) for a 1d context (decimal ints)
(0 0) to (7 7) for a 2d context (octal lists)
(0 0 0) to (3 3 3) for 3d context (quat lists)
(0 0 0 0 0 0) to (1 1 1 1 1 1) for a 6d context (bit lists)