Howto change PulseAudio sample rate
This tutorial will explain Howto change PulseAudio sampling rate.This is very useful if you have problems with any external devices using different sample rate.
Solution
You can change PulseAudio sample rate in /etc/pulse/daemon.conf file
gksudo gedit /etc/pulse/daemon.conf
Just look for the following line
;default-sample-rate = 44100
and change it to look like this:
default-sample-rate = 48000
Save and exit the file
Note:- Make sure you have removed ;
Now you will need to restart pulseaudio for that to take effect
To restart pulseaudio use the following command
pulseaudio -D
Via Ubuntu forums