Natyashastra
अविचलितमविच्छिन्नं वर्णालङ्कारसंयुतं विधिवत् । ललितं मधुरं स्निग्धं वेणोरेवं स्मृतं वाद्यम् ॥ ११ ॥
The flute, when played according to the rules, is steady, uninterrupted, and adorned with the beauty of its tones and embellishments. It is considered to be melodious, sweet, and smooth.
english translation
avicalitamavicchinnaM varNAlaGkArasaMyutaM vidhivat । lalitaM madhuraM snigdhaM veNorevaM smRtaM vAdyam ॥ 11 ॥
hk transliteration by Sanscript