Currently the person plays the recorded audio on her laptop and practices along with it, the issue is background noise and other household noise distracting her.
I am not a qualified person, my suggestion to her (Need your advice here) is to use a 2 Ch Analog mixer (some good quality but low cost), where one Ch of the mixer-input is connected to the Laptop audio out, second input Ch of the mixer is connected to the Mic (my guess a Dynamic type ?) that is placed near the Sitar or Piezo pickup. The Audio from both Ch is mixed and routed to a headphone (after splitting the mono to stereo). The musician can then balance the gain as to what suits her. Is this a correct approach ? .is this how people use ? Not sure if I will need any preAmp for Mic or Headphone. Suggestion on analog mixer and Mic/Piezo ? (low cost)