ग्लॉकेंस्पील

Among the four Natya Shastra instrument classes (tata/strings, sushira/winds, avanaddha/drums, ghana/solids), the glockenspiel belongs to 'Ghana' — solid self-sounding instruments whose own metallic body vibrates to make sound (like manjira, bells, jaltarang). It has no strings or membrane; instead, tuned metal bars are struck with mallets to produce pitches.

Rectangular case/frame holding a graduated set of bars (concert models sit on a table or trolley; the marching 'bell lyra' is mounted in an upright lyre-shaped frame)

Frame of wood or metal; tone bars of hardened steel (some student models use aluminium alloy)

Usually none — the small steel bars ring on their own; unlike vibraphone/marimba, the glockenspiel generally has no tubular resonators, which keeps its tone pure, bright and penetrating

Graduated tuned steel bars arranged like a piano keyboard — the 'naturals' in front, the 'accidentals' raised behind

The glockenspiel has no sympathetic/resonating strings; each bar rings only when struck. Its 'shimmer' comes from the steel's own high overtones, not from sympathetic vibration.

Pairs of small beaters with hard heads of brass, plastic, or hard rubber; harder heads give a brighter, more metallic 'ting', softer heads a rounder tone

Held one in each hand and bounced off the bar for a clean, ringing strike; rolls (rapid alternating strokes) sustain a note since the bars are otherwise short-decaying

Bars are tuned at manufacture by precisely filing their length and thickness; the player cannot retune bars during performance, so the instrument is fixed-pitch and chromatic

Bars rest on felt- or cord-lined rails at their nodal points so they can ring freely; pins pass through holes at the nodes to hold each bar without damping it

It is a bar instrument, not a string instrument — there are no frets and no scope for meend (glissando). Each bar sounds one fixed pitch, so it excels at clean, pointillistic, sparkling notes rather than the sliding ornament central to Indian melody.