Step 1: Understanding the Concept:
The question asks for the specific symbol used to denote 'Khali' (the unstressed beat, indicated by a wave of the hand) in the notation system developed by Pt. Vishnu Digambar Paluskar.
Step 2: Detailed Explanation:
There are two main notation systems for Hindustani music tala:
- Bhatkhande System: Uses 'x' for Sam (the first beat) and '0' for Khali.
- Paluskar System: Uses '1' for Sam and '+' for Khali.
Therefore, in the Paluskar system, the symbol for Khali is the plus sign (+).
Step 3: Final Answer:
The symbol '+' is used for Khali in the Paluskar tala notation system.