With Pāyāsi 19.20

19.20

‘yadā kira, bho, ayaṃ saṅkho nāma purisasahagato ca hoti vāyāmasahagato ca vāyusahagato ca, tadāyaṃ saṅkho saddaṃ karoti, yadā panāyaṃ saṅkho neva purisasahagato hoti na vāyāmasahagato na vāyusahagato, nāyaṃ saṅkho saddaṃ karotī’ti.

‘So, it seems, when what is called a horn is accompanied by a person, effort, and wind, it makes a sound. But when these things are absent it makes no sound.’