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Online Surpeti - Free Virtual Shruti Box

The Surpeti, or Shruti Box, provides the steady drone that anchors Indian classical music, helping maintain pitch and tonal stability during riyaz or performance. Also known as an electronic shruti box, this online surpeti lets you set your Sa, adjust speed and volume, and keep a steady reference pitch for daily riyaz.

What would you like to learn?

Free online surpeti (shruti box)

A free online surpeti, or shruti box, for riyaz and singing practice. It plays a steady drone at the pitch you choose, in your browser, with no download.

How to use it

  1. Choose your Sa: the pitch your voice or instrument is tuned to.
  2. Tap to play. The drone keeps sounding until you tap again to pause.
  3. Adjust the speed and the volume to suit your practice.

Frequently asked questions

What is a surpeti?

A small reed instrument with bellows, also called a shruti box, that sounds a continuous drone. It is used in Indian music as a pitch reference while singing or playing.

Surpeti or tanpura: which should I use?

Both give a drone to sing against. The surpeti gives a steady, sustained tone; the tanpura's plucked strings give a richer, shimmering sound. Use whichever you find easier to sing with.

Is the online surpeti free?

Yes. It is free to use in your browser, with no download or sign-up.

Why can't I hear anything?

Browsers only play sound after you tap or click on the page, so tap the tool once to start it. Also check that your device isn't on silent and that the volume is up.