Wondering what you are hearing over the air, especially via Eureka 147 DAB? The report is based on carefully controlled subjective testing by four groups in four countries of 36 combinations of codecs in cascades of 5, typical in a broadcaster's chain through field acquisition, contribution, production, distribution and transmission.

"The cumulative effect of cascaded audio coding can be highly detrimental to audio quality, even when each stage in the chain makes only a small reduction in quality."

BBC White Paper WHP 118, Sept 2005
http://www.bbc.co.uk/rd/pubs/whp/whp-pdf-files/WHP118.pdf

Tom