How to set fixed sample rate for input device?

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Hi there,

regarding my other webcam microphone issue I now know where the problem is...

With this command I can record voice with my webcam just fine:

arecord -vv -D hw:1,0 -c 1 -f S16_LE --rate=18000-v test.wav

But, I always have to specify the 18000 Hz sample rate. How or better asked 
where can I set that sample rate, so every program that uses that microphone 
use it at the 18000 Hz?

Thanx
Malte

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