The clouds in personified form beat various types of drums, known as mṛdaṅgas, paṇavas, murajas and ānakas. They also blew conchshells and bugles known as gomukhas and played flutes and stringed instruments. The combined sound of these instruments was tumultuous.
Srimad Bhagavata Purana
श्रीमद्भागवतमहापुराणम्
मूल श्लोकः
मेघा मृदङ्गपणवमुरजानकगोमुखान् । व्यनादयन् शङ्खवेणुवीणास्तुमुलनिःस्वनान्
meghā mṛdaṅgapaṇavamurajānakagomukhān | vyanādayan śaṅkhaveṇuvīṇāstumulaniḥsvanān
SB 8.8.13