{{formGroup fields.name value=source.name rootId=rootId}}
{{formGroup fields.path value=source.path rootId=rootId placeholder="path/to/audio.ogg"}}
{{formGroup fields.channel value=source.channel choices=channels rootId=rootId blank=defaultChannel}}
{{formGroup fields.volume value=lvolume rootId=rootId}}
{{formGroup fields.repeat value=source.repeat rootId=rootId}}
{{formGroup fields.fade value=source.fade placeholder="0" classes="slim" rootId=rootId units=milliseconds}}
{{formGroup fields.description value=source.description compact=true classes="stacked" rootId=rootId
    elementType="prose-mirror"}}