Crossfade produces beeping sound when playing some tracks from silence or when changing tracks

I have Crossfade on for 3 seconds. When I play some tracks, a very clear beeping sound appears. It happens when the tracks are played from silence (nothing was playing before), or when tracks change (and of course crossfade). The beeping sound appears for some seconds at the beginning and stops. It doesn't stay for the whole track.

This doesn't happen when Crossfade is off, or when I play the same tracks in Totem (Totem doesn't have Crossfade). It also doesn't happen when I play the same tracks in a media player which is not Gstreamer-based, like gnome-mplayer.

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: rhythmbox 3.0.2-0ubuntu2
ProcVersionSignature: Ubuntu 3.19.0-25.26~14.04.1-generic 3.19.8-ckt2
Uname: Linux 3.19.0-25-generic x86_64
NonfreeKernelModules: fglrx wl
ApportVersion: 2.14.1-0ubuntu3.11
Architecture: amd64
CurrentDesktop: Unity
Date: Fri Aug 14 11:24:50 2015
ExecutablePath: /usr/bin/rhythmbox
InstallationDate: Installed on 2015-06-16 (58 days ago)
InstallationMedia: Ubuntu 14.04.2 LTS "Trusty Tahr" - Release amd64 (20150218.1)
SourcePackage: rhythmbox
UpgradeStatus: No upgrade log present (probably fresh install)