CC Antya 13.128

pika-svara-kaṇṭha, tāte rāgera vibhāga
eka-śloka paḍite phirāya tina-cāri rāga
Word for word: 
pika-svara-kaṇṭha — a very sweet voice like a cuckoo’s; tāte — above that; rāgera — of tunes; vibhāga — division; eka-śloka — one verse; paḍite — reciting; phirāya — changes; tina-cāri rāga — three or four different tunes.
Translation: 
His voice was as sweet as a cuckoo’s, and he would recite each verse of Śrīmad-Bhāgavatam in three or four tunes. Thus his recitations were very sweet to hear.