Timeline redesign on Audio Pro similar to followme2 or Beat Slinger 2 Skin
Design and Skin Customization
jrAudioPro2 skin does not have skin level over-rides for the timeline module ('jrAction') where the 'beatslinger' skin does.
You could try copying those over-ride files into your skin, see how far it gets you. They're just module over-ride files so it may work:
action_input.tpl
jrAction_index.tpl
jrAction_item_action_detail.tpl
jrAction_item_detail.tpl
jrAction_item_detail_feature.tpl
jrAction_item_index.tpl
jrAction_item_list.tpl
Its always going to be best if you're working from a cloned skin though because any changes to an jamroom skin structure would get lost if the skin is updated.