We did it...... after an anxious[0] morning and months of practice (...ok just 8 weeks), our ragitty troup managed to pull of an evening of karnatic musical performance. There was the usual excitement, anxiety (for the teacher), tears[1]. The juniors (kids really) started off before us and we observed that both instrumentalists (who were superb) hardly played as some kids were not able to keep the swara (tune). Thankfully by the time we started, the accompanists caught on very quickly and our hour long performance stretched out to a whole 90 min... and this without any tani avartanams (solo performances by instrumentalists). The major credit goes to our guruji's as they took a lot of trouble... no two students are the same, each of us has an individual way of learning, and yet they were able to acomodate us all with our individual uniqueness. In the past i had a teacher who took 4 months to teach one raaga, and needless to say i was not her student for long. Teaching is definitely an art ! Our team had girls with almost 10-20 years age difference between them and yet we sync'd well. Rather we were making such a ruckus backstage that the accompanists glared at us often, sometimes used the instrument to talk to us ...very interesting ;-)
Besides swara, in a duet or group, what is it that makes the team tick ? To me the most important thing is synchrony. Just as in a team, one person may have a strong voice, other shrill, yet another may have good gamakas, ..... so how do we keep all this in mind while performing as a team ?

SALT ...
Synchronise yourself to your team (members),
Adjust your voice/tone/pitch,
Learn to Listen ... i cant stress this enough and we all know how difficult that is in any situation ;-)
Train yourself to "Observe" the big picture (== the overall team output) and not just yourself.

[0] Most classical performances are impromptu, so no rehearsals with the accompanists (violin, mridangam, etc..]. The only time we will meet is on stage, for a live performance.
[1] A song was supposed to start on the 8th pitch, she could not and was upset when the audience spoke about it. Unlike western classical music, Indian classical/Karnatic music does not have written scale / musical notations .