It sounds simple enough... I might could make this.
Why not use the vbRadio ?
Will the song be playing continuously as you browse through that certain forum (if so, then it might require a popup window or something) ?
Check these topics :
https://vborg.vbsupport.ru/showthread.php?t=83132
https://vborg.vbsupport.ru/showthread.php?t=78323
https://vborg.vbsupport.ru/showthread.php?t=68440