Comment 9 for bug 474714

I think I have a similar issue, but I couldn't solve it.
In my case I upgraded pulseaudio manually from 4.0 to 7.0, since yesterday everytime I plug in some headphones (bluetooth ones or not) the sound goes weird like scratchy..
So, please help me!
Here's my output when I type:
$pulseaudio -v
pulseaudio: relocation error: pulseaudio: symbol pa_sample_rate_valid, version PULSE_0 not defined in file libpulse.so.0 with link time reference
$which pulseaudio
/usr/bin/pulseaudio
$ldd `which pulseaudio`
 linux-vdso.so.1 => (0x00007ffe99a82000)
 libpulsecore-7.0.so => /usr/lib/libpulsecore-7.0.so (0x00007f031de2e000)
 libpulse.so.0 => /usr/lib/x86_64-linux-gnu/libpulse.so.0 (0x00007f031dbe5000)
 libpulsecommon-7.0.so => /usr/lib/pulseaudio/libpulsecommon-7.0.so (0x00007f031d976000)
 libltdl.so.7 => /usr/lib/x86_64-linux-gnu/libltdl.so.7 (0x00007f031d76c000)
 libcap.so.2 => /lib/x86_64-linux-gnu/libcap.so.2 (0x00007f031d567000)
 libpthread.so.0 => /lib/x86_64-linux-gnu/libpthread.so.0 (0x00007f031d348000)
 libdl.so.2 => /lib/x86_64-linux-gnu/libdl.so.2 (0x00007f031d144000)
 libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007f031cd7f000)
 libsndfile.so.1 => /usr/lib/x86_64-linux-gnu/libsndfile.so.1 (0x00007f031cb16000)
 libspeexdsp.so.1 => /usr/lib/x86_64-linux-gnu/libspeexdsp.so.1 (0x00007f031c903000)
 libm.so.6 => /lib/x86_64-linux-gnu/libm.so.6 (0x00007f031c5fd000)
 /lib64/ld-linux-x86-64.so.2 (0x00007f031e0e0000)
 libjson-c.so.2 => /lib/x86_64-linux-gnu/libjson-c.so.2 (0x00007f031c3f1000)
 libpulsecommon-4.0.so => /usr/lib/x86_64-linux-gnu/pulseaudio/libpulsecommon-4.0.so (0x00007f031c18a000)
 libdbus-1.so.3 => /lib/x86_64-linux-gnu/libdbus-1.so.3 (0x00007f031bf45000)
 librt.so.1 => /lib/x86_64-linux-gnu/librt.so.1 (0x00007f031bd3c000)
 libFLAC.so.8 => /usr/lib/x86_64-linux-gnu/libFLAC.so.8 (0x00007f031bb0b000)
 libvorbisenc.so.2 => /usr/lib/x86_64-linux-gnu/libvorbisenc.so.2 (0x00007f031b63b000)
 libvorbis.so.0 => /usr/lib/x86_64-linux-gnu/libvorbis.so.0 (0x00007f031b40e000)
 libogg.so.0 => /usr/lib/x86_64-linux-gnu/libogg.so.0 (0x00007f031b205000)
 libxcb.so.1 => /usr/lib/x86_64-linux-gnu/libxcb.so.1 (0x00007f031afe5000)
 libwrap.so.0 => /lib/x86_64-linux-gnu/libwrap.so.0 (0x00007f031addb000)
 libasyncns.so.0 => /usr/lib/x86_64-linux-gnu/libasyncns.so.0 (0x00007f031abd5000)
 libXau.so.6 => /usr/lib/x86_64-linux-gnu/libXau.so.6 (0x00007f031a9d0000)
 libXdmcp.so.6 => /usr/lib/x86_64-linux-gnu/libXdmcp.so.6 (0x00007f031a7ca000)
 libnsl.so.1 => /lib/x86_64-linux-gnu/libnsl.so.1 (0x00007f031a5af000)
 libresolv.so.2 => /lib/x86_64-linux-gnu/libresolv.so.2 (0x00007f031a394000)