On Fri, 27 Jul 2018 11:27:39 -0500 David Wright <deb...@lionunicorn.co.uk> wrote:
> > But one opportunity you ought perhaps to exploit when encoding your > CDs (and any other audio sources like youtube etc) for the car or > portable players is to compress the dynamic range. Car stereos can > produce good quality when parked up, but at 85mph it's pointless > trying to play through any quiet passages. > The BBC used a dynamic range of 26dB (from 1 to 7 on a BBC PPM scale) for FM transmissions of Radio 3 (classical) and Radio 4 (news and drama) and didn't try for more, as they reckoned that the average domestic environment couldn't cope with more. Look at the level of Radio 1 (pop) and the PPM needle barely moved. It had a dynamic range of about 5dB, as this was felt to be all that was possible in the average car environment. Datum: I bought Roxy Music's Virginia Plain as a 45. On the radio, the introduction is a little quieter than the main part of the record. I thought the recording level was very low on my copy, and turned the volume up quite high the first time I played the introduction. When the main instruments came in, I nearly had to get my speakers reconed... I presume nothing has changed... -- Joe
