A top hi-fi manufacturer is embracing the move to wireless loudspeakers by selling buckets of special, high-purity air to carry the wireless signals.
"A lot of people are using common or garden air for their wireless systems; obviously it makes sense to replace that with our top quality air which is specially imported from the Alps. We're sure that once hi-fi enthusiasts have replaced their air, there will be an clear difference. Obviously, users should refrain from breathing whilst listening to music."
The purified air is £199 per cubic centimetre.