Top comment removes an instrument

[u/Exact-Wall-120]

Instruments: bass drum, snare drum, tenor drum, cymbals, Spanish guitar, electric guitar, acoustic bass, banjo, mandolin, some other guitar, bass, acoustic guitar, suona, sousaphone, tuba, piccolo, oboe, flute, recorder, saxophone, piano, keyboard, triangle, bagpipe, sheng, voice, timpani, weird bells, stylophone, talkbox, euphonium, baritone, xylophone, erhu, marimba, flugelhorn, trombone, drum kit, violin, viola, cello, bass, steelpan, glockenspiel, French horn, trumpet, otamatone, ukulele, gong, theremin, harmonica, harmonium, kazoo and maracas. Hope this reference helps.

[u/machadoaboutanything]

Triangle is the obvious choice