Bg 1.13

tatah sankhas ca bheryas ca
panavanaka-gomukhah
sahasaivabhyahanyanta
sa sabdas tumulo ’bhavat

Word for word: 
tatah — thereafter; sankhah — conchshells; ca — also; bheryah — large drums; ca — and; panava-anaka — small drums and kettledrums; go-mukhah — horns; sahasa — all of a sudden; eva — certainly; abhyahanyanta — were simultaneously sounded; sah — that; sabdah — combined sound; tumulah — tumultuous; abhavat — became.

Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
After that, the conchshells, drums, bugles, trumpets and horns were all suddenly sounded, and the combined sound was tumultuous.