Technical Terminology and Acoustics
What the exam tests
This domain tests precise terminology: nada, shruti, svara, raga rules, tala structure, laya, and basic acoustics. Expect definition and application questions, including "which svara is vadi" and "where is sam".
Core concepts
- Nada means sound; musical nada is sustained and pitched. Shruti means microtonal position; 22 are described in theory.
- Saptasvara: Sa Re Ga Ma Pa Dha Ni. Komal (flat), tivra (sharp), and octave markers modify them.
- Raga rules: aroha (ascending), avaroha (descending), pakad (catch-phrase), vadi (principal), samvadi (secondary), anuvadi (assisting), vivadi (dissonant). Jati is the number of svaras used.
- Tala: matra (beat), vibhag (group), tali (clap), khali (empty), sam (first beat), avartan (cycle), theka (syllables).
- Laya: vilambit (slow), madhya (medium), drut (fast).
- Acoustics: pitch depends on frequency; an octave has a 2:1 ratio; harmonics shape timbre; consonance and dissonance are perceptual and cultural.
Worked example
Question: A tala has 16 matras divided 4+4+4+4. The first beat is sam; the third vibhag is khali. How many matras are in each vibhag, and where does khali fall? Reasoning: 16 ÷ 4 = 4 matras per vibhag. Vibhags begin at matras 1, 5, 9, and 13. The third vibhag begins at matra 9, so khali is marked at matra 9. Sam is matra 1. Answer: 4 matras; khali at 9.
Traps
- Confusing vadi (main) with samvadi (second).
- Calling khali a "clap"; khali is an empty or unmarked beat.
- Treating 22 shrutis as equal semitones.
- Mixing laya terms with tala names.