how to make a concert effect to a song or music?
Do you mean make it sound like it's being heard in a concert hall or
do you mean concert as in a chorus of people singing?
Hi. Yes that's it. Concert salon effect.
One way to do this is to use the Effect - Full Reverb
You can use it in the multitrack or waveform editors
If doing it in waaveform view, please make a copy of your source file to edit
as any changes here are destructive.
One of the presets is: Medium Concert Hall (Warm)
This could be a good starting point.
besides that what Euan has written you also can that look up in the Adobe Audition Help pages (see https://helpx.adobe.com/audition/using/reverb-effects.html ) for more Details. Also there should be many Tutorial Videos out there on youtube, etc. that will explain it in Detail. Hope that helps.