stereoChannelControl.xaml

<UserControl x:Class="MusicPlayer.StereoChannelControl"
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
             xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
             xmlns:local="clr-namespace:MusicPlayer"
             mc:Ignorable="d"
             d:DesignWidth="150"
             x:Name="VolumeSlider"
             Height="12">
    <Grid>
        <ProgressBar x:Name="channelBar" Grid.Column="0"
                     Style="{StaticResource ProgressBar-Volume}"
                     Value="{Binding Path=Volume, ElementName=VolumeSlider}"
                     Orientation="Vertical"
                     VerticalContentAlignment="Stretch"
                     HorizontalContentAlignment="Stretch"
                     Margin="0,0,10,0" />
        <Rectangle x:Name="channelUnderload"
                   Grid.Column="1"
                   Width="8"
                   Fill="#FF595959"
                   Stroke="#FF232528"
                   HorizontalAlignment="Right" />
        <Rectangle x:Name="channelOverload"
                   Grid.Column="1"
                   Visibility="Hidden"
                   Width="8"
                   Fill="Red"
                   Stroke="#FF232528"
                   HorizontalAlignment="Right" />
    </Grid>
</UserControl>