In article .com,
Robert
wrote:
I have a question about the extent to which the DAB stereo image can be
sacrified in order to reduce the sound distortion.

If I simply add the two analgue channels together (after decoding) to
give a monaural sigal would this reduce the distortion or would I need
something more elaborate and 'digital' to achieve it? Perhaps the
answer is different for "true stereo" channels, such as Radio 3, and the
more numerous "joint stereo" channels.

I am not sure, but for 'real' stereo as distinct from 'joint' I suspect
you'd find that there will be no tendency for the distortions to be mainly
aligned in the L-R direction. Hence I doubt that simply paralleling for
mono would reduce the distortion.

With 'joint' I suspect it would just lower the level when the joint part
was full L or R, and not alter the distortion.

A related question is: Would Radio 3 give less distortion if it used
joint stereo instead of 'full' stereo? That is, could the BBC choose
to reduce distortion at the cost of a poorer stero image?

No idea.

Slainte,

Jim

--
Electronics http://www.st-and.ac.uk/~www_pa/Scot...o/electron.htm
Audio Misc http://www.st-and.demon.co.uk/AudioMisc/index.html
Armstrong Audio http://www.st-and.demon.co.uk/Audio/armstrong.html
Barbirolli Soc. http://www.st-and.demon.co.uk/JBSoc/JBSoc.html