Question

Definition of sur and tal

Answer 1

This is a very basic and superficial information. Deep studies result in different understandings.

“Sur” is the feeling of pitch match with the reference “Sur" ( tanpura, harmonium, etc.). “Sur” is a note, it may be produced by any instrument, or by using vocal chords.

“Taal” is a way to measure time. There are many “Taals“, ways to measure time. The instruments differ, but basically have same “Taal” background. The “Taals” are composed of “bols".

The way to address the question is that, Taal and Sur have only one thing in common that they are part of Indian Classical Music. They compliment each other to create an enriching performance.

Sur and Taal are very deep concepts, worth learning in a lifetime. I am no expert, but have tried to answer on my level of perception.

Answer 2

sur is the feeling of pitch match with the reference . it is a note
taal is a way to measure time taals are composed to bols
it may be helpful to you