An online tanpura in G♯

What C♯ is to male voices, G♯ is to female ones. Kali chaar is the classic female khyal Sa — the key female vocal recordings default to, the one teachers reach for first, the pitch a hall's tanpura gets retuned to when the soloist changes. If you sing khyal and were taught "black four", this page is your key.

Sangat gives it to you without ceremony: open the app and a real tanpura, at G♯, is already sounding. Eighteen tunings run from a deep Kharaj Sa to a high Ma for ragas that want it; two voices sit deeper or brighter under your range; three plucking styles set the roll.

All of it is free, with no account. And if you have only assumed G♯ is your Sa, Find my Sa can listen to a phrase or two and confirm it.