あなたの Sa を見つける

What this tool does

マイクに発声するだけで、自然な音高を検出し Sa を自動設定。

Indian classical music is built around your personal tonic, Sa. This tool listens through your microphone, runs a YIN pitch-detection algorithm in your browser, and tells you the closest MIDI note. Click Set as Sa on the keyboard to load it directly into the virtual harmonium so you can riyaz in the right key immediately.

How to use it

1. Find a quiet room. Headphones are recommended to avoid the speakers feeding back into the mic.
2. Click マイクを開始 and grant microphone permission. Audio never leaves your device.
3. Sing a steady, comfortable “aaa” for 3–5 seconds.
4. When the detected pitch stabilizes, click この音をキーボードの Sa に設定.
5. The homepage harmonium opens with your Sa preloaded. Sing along.

FAQ

よくある質問

What is Sa in Indian classical music? ▾

Sa (षड्ज) is the tonic — the reference pitch all other swaras (notes) are measured against. Unlike Western music, Sa is not fixed to a frequency; each singer chooses a Sa that matches their voice.

How do I pick a comfortable Sa? ▾

Sing a relaxed “aaa” at a pitch that feels neither tense nor sleepy. Most adult male voices land near C3–E3 (130–165 Hz); most adult female voices land near G3–B3 (196–247 Hz). Use the microphone tool above to confirm.

Why does the harmonium need to be tuned to my Sa? ▾

Indian vocal music is taught in “movable Sa” — the tonic moves with the singer. Setting your harmonium’s Sa correctly means every Sargam syllable matches the right key, which is essential for sruti-shuddha (in-tune) practice.