It is mandated in the AIFF spec; processors such as the 68000 (possibly
Power PC as well?) cannot read directly from odd addresses, so the
format was designed to be friendly to those machines.

Future formats may even require alignment to 64bits - SDIF is one such,
and even Microsoft may be moving away from byte-alignment for Win64.

Richard Dobson

jpff@maths.bath.ac.uk wrote:
> 
> What must teh text be even length? I cannot see any reason for it.
> Anyway I have extended teh AIFF header reader to deal with those
> chunks.
> ==John

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