Write to support@getsangat.com and you will get a reply. Most things are below.
Follow Voice is deliberately slow to commit. It wants several seconds of settled, confident singing before it moves your accompaniment, because a tanpura that re-tunes itself every time you slide between two notes is worse than one that never moves. Sing a phrase and let it come to rest — resolving to Sa is exactly the signal it is looking for.
If you do not want to wait, tap Use this Sa and it applies whatever it is hearing right now.
Tap Start over and sing a few phrases that settle on your Sa. If it lands a fourth or a fifth away it has usually latched onto a strongly emphasised Ma or Pa; a phrase that comes down to Sa and stays there for a moment will move it.
You can also just set Sa by hand on the Tune tab and turn Follow Voice off. Nothing else depends on it.
Under Behaviour on the Voice tab. With it off, Follow Voice still listens and still shows you what it hears, but it will not change your accompaniment until you tap Use this Sa.
Follow Voice is the only feature that uses the microphone, and it is only on while it is listening. If you declined the permission, the app will say so; you can grant it later in your phone's Settings under Sangat. Everything else in the app works without it.
It should not — Sangat keeps playing with the screen off, and shows transport controls on the lock screen. If it stops, check that your phone's battery saver is not restricting the app, and on Android that notifications are allowed for Sangat (the media controls are a notification, and a foreground service without one gets stopped by the system).
Expected, and the honest version of a trade-off. On the synthesised voices a new Sa means re-baking the instruments at that pitch — about 150 ms — and while that happens you hear the existing sound stretched to the new pitch so it follows your finger immediately, with the exact version swapping in when it is ready.
Settings → instrument sound, one switch per instrument.
Recorded is the default: real tabla strokes, tanpura plucks and plucked strings, re-pitched on your phone to the Sa you chose. It has the grain of a struck skin and a plucked wire, which no model quite reproduces.
Synthesised is the physical model — the dayan's modes, the tanpura's jawari bridge, the swarmandal's stiffer strings — rendered at your exact pitch rather than re-pitched towards it. Some people prefer it at extreme Sa settings, where a recording has further to travel.
If a recording cannot be decoded on your phone, the app switches that instrument to synthesis by itself rather than going quiet. Settings shows which state it is in, under instrument sound.
After a Follow Voice session, Play it back sounds your take on a harmonium — your notes, your pauses, your pacing. Saving the session keeps it, and the Riyaz list plays it again with ▶.
What is kept is the notes, not your voice: a list of which note started when, the way notation works. There is no audio recording of you anywhere in the app. See the privacy policy.
Very likely, and neither is wrong. Thekas vary by gharana, by region, and by what a particular teacher plays. Sangat ships the most widely taught form of each, and where there is a well-known alternative it is a second theka on the same taal — tap the taal and look for the thekas list. Each taal also carries a note where the variation matters.
If a form you were taught is missing, write in and say which taal, which theka and which gharana. That is a good bug report.
The search box on the Taal tab matches Roman and Devanagari names. 68 taals are included, from 4 matras to 28.
The Riyaz tab. Name the current board — Sa, taal, tempo, tunings, volumes — and it will come back exactly as you left it. Long-press a saved session to rename, duplicate, favourite or delete it.
Under Auto stop, also on Riyaz: after a number of minutes or a number of cycles. It fades out rather than cutting off.
Email support@getsangat.com. What helps:
Sangat has no crash reporting, by design, so a description from you is genuinely the only way a problem gets found.
Also welcome, at the same address. Taals, thekas, tunings and ragas are the easiest things to add.