Zapping's sound no longer works after a power outage

[Paul Lewis <paul.lewis@karachi.freeuk.com>]

Audio from Zapping has stopped working, all other desktop sounds seem 
to work fine. Mail arrives, windows open with a whooosh. So I have 
audio but not through Zapping.

Anyone suggest where to look?

Zapping sound configuration is set to /dev/audio
but I have tried using /dev/dsp

TIA