A LOCAL orchestra will be heard by a national audience tonight. Slaithwaite Philharmonic will be broadcast on BBC Radio 3’s Performance On 3 which features amateur orchestras. A part of Slaithwaite Philharmonic’s Summer Proms will be heard. Also featured is the Dundee Symphony Orchestra, performing Beethoven; the Kensington Chamber Orchestra (Bruch); and Birmingham Symphonic Winds (Rodrigo). The show goes out between 7pm and 9.15pm.