シュルティ・ボックス（持続ドローン）
ボーカル練習・瞑想用の安定した電子 Sa-Pa ドローン。
About this shruti box
A digital shruti box that runs entirely in your browser. Choose Sa, Pa, Ma or Ni, set your tonic with the slider, and practice with a steady drone. No installation, no signup, no ads — just a clean reference pitch.
How to practice with a drone
- Set Sa to your comfortable tonic (use the Find Your Sa tool if unsure).
- Turn on Sa for melodic warmups, or Sa + Pa for raga practice.
- Sing long-tone Sa, then slowly add Re, Ga, Ma, Pa — listening for the drone’s overtones to lock in.
- Match each swara to the drone’s harmonics; this trains sruti-shuddha intonation.
FAQ
よくある質問
What is a shruti box?
A shruti box (sur-peti) is a hand-pumped reed instrument that produces a steady drone — typically Sa and Pa. It anchors a singer’s pitch during practice, kirtan and yoga.
Shruti box vs tanpura — what is the difference?
A tanpura plays a four-string plucked cycle (e.g. Pa-Sa-Sa-Sa) with rich overtones, while a shruti box holds two or three notes continuously. The shruti box is simpler and steadier; the tanpura is richer and more meditative.
Which drone notes should I use?
Sa alone for melodic clarity, Sa+Pa for most ragas (Yaman, Bhairav), and Sa+Ma for ragas that omit Pa (Malkauns, Marwa).