Slight craclinkg with Ubuntu and Behringer usb mixer / soundcard

When I play music on my laptop I experience slight craclinkgs that tends to be very annoying when you notice them.

I use a Behringer Xenyx 302 USB. But I actually have noticed that it occurs with the laptop headphone jack.

Finally I figured out that my mixer soundcard has a sample rate of 48000kHz. But in /etc/pulse/daemon.conf, I have :

; default-sample-rate = 44100

(the ; means it's commented out)

So I set it to :

default-sample-rate = 48000

then I restarted it with :

pulseaudio --kill
pulseaudio --check
pulseaudio --start

And it did the trick !

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