Yes downsampling is an option. But this inserts delays, especially in
my situation where I want to record and output the signal in realtime.
But I'm willing to try. :-)

Do you have access to any source code or pseudo-code that can resample
(for realtime applications??) using an integral factor (48khz to 8khz
is a 1 to 6 ratio).

Thanks for the info.

Christian