To: Vlad
Thanks for the offer of help.
I just realized what happened.
I played the mp3 i was going to insert by itself, no problem.
i played it in the AVS software with the video muted, no problem
I played it with the video not muted, echo effect.
I finally played the video without the mp3 and the sound from the mp3 was already put into the video, hence the echo when I played it with the mp3.
LOL, sorry to have bothered you but again thanks for the info.