Solve these clues to fill the grid.
- The month following February and preceding April
- 3 Across
- Keyboard instrument with black and white keys
- 4 Across
- A business relation in which two parties ___ to gain customers
- 7 Across
- A musical composition for one voice or instrument
- 9 Across
- A high-pitched woodwind instrument
- 10 Across
- Tool for weighing things; also a set of musical notes (plural)
- 13 Across
- A Berber living in northern Morocco
- 14 Across
- A notation representing the pitch and duration of a musical sound (plural)
- 15 Across
- A brass musical instrument with a brilliant tone
- 1 Down
- The second lowest adult male singing voice
- 2 Down
- To utter or emit low dull rumbling sounds
- 5 Down
- The section of a band or orchestra that plays ___ instruments
- 6 Down
- An alloy of copper and zinc
- 8 Down
- Style of music with improvisation, born in New Orleans
- 11 Down
- A musical percussion instrument (plural)
- 12 Down
- The lowest brass wind instrument
- 16 Down