"Ta" is a resonant note made on the small head with
the index finger (the finger rebounds after the strike, and the
head is allowed to vibrate freely).
To make the "Ta" sound, the finger should be stiff,
and strike the drum at a slight angle (the finger should not be
parallel to the head). The base of the fingers strikes the rim of
the head and automatically the finger will hit the head and
rebound. After striking the head, the finger should not be resting
on the head.
The strike should be made just below the center of the head as
Listen how it sounds.