To choose a shruti, you should know your own pitch (women generally sing between kaTTai 4 and 6, and men sing at 0-2). The beginners' audio lessons are at shruti G or kaTTai 5, and those given on Shivkumar Kalyanaraman's Krithi Archive are at shruti C# or kaTTai 1.5. For each file, the Western note and the kaTTai or shruti level are given. Click on a shruti to download (Please download to your computer and save rather than clicking on the file each time).

The first is the old set, followed by a 1 minute shruti set at 440Hz, followed by a long 8 minute file (about 40MB). Please save on your computer. Thanks to Samos Alixopoulos!

Update for PC users: Now you can also download for free Ganesh Balasubramanian's electronic tambura here.

What can you do with the shruti box?

• Use it for your vocal or instrument practice, to be sure you're in tune.
  
• Use it to tune your instrument.
  
• Listen to it to get a sense of your shruti, and do vocal exercises.
  
• Use it while performing songs at home for visitors.
  
• Just listen, to let the sound sink into you.