It should work (except the speaker icon). If it's not working, post your entire code for the album tracks type.
<autoHide name="#RightSidebarAlbumTracks" xAnchor="Panel.Right" x="-281" y="1" width="281" heightDock="Panel" height="-2" bg="250,20,20,20" fg="215,215,215" fg2="255,255,255" allowPinning="true" resizePictures="false" >
<element type="Line" xAnchor="Panel.Right" x="-260" yAnchor="Panel.Top" y="65" width="247" height="2" bg="78,177,186"></element>
<element type="Field" id="Album" xAnchor="Panel.Right" x="-262" y="35" width="250" font="Dosis" style="Bold" size="12" fg="220,186,255" ></element>
<element type="Field" id="Artist" xAnchor="Panel.Right" x="-262" y="68" width="250" heightDock="Panel" font="Dosis" style="Regular" size="14" fg="157,182,249" bg="250,20,20,20"></element>
<element type="AlbumTracks" xAnchor="Panel.Right" x="-281" y="95" width="281" heightDock="Panel" height="-2" fg="215,215,215" fg2="78,177,186" allowPinning="true" resizePictures="false" mouseOverFg="78,177,186">
<child width="10" />
<child id="Speaker" width="30" />
<child id="TrackNo" />
<child>. </child>
<child id="Title" width="225" />
<child id="Duration" />
</element>
</autoHide>