Seven hot air balloons playing music aimed at giving sleepers sweet dreams have been floating above Birmingham today.

The Sky Orchestra piped out a dawn chorus of music devised by sleep psychologists after taking off from the city's Millennium Point visitor attraction.

The early morning flight marked the launch of Birmingham's bid for a share in a 15m Arts Council fund for promoting cultural events.

Speakers attached to each balloon play a different part of a musical score which combines to create a "musical landscape" reminiscent of whales calling to each other in the ocean.

Organisers notified residents of the stunt with a leaflet drop