Unfortunately I can not say anything to the sound, because it for my purpose (still) not working. I have ordered it as an extension to the Rode smartLav. The sound quality of mobile video (iPhone) should therefore be improved. Without extension everything works fine. I then found that I need an adapter between iPhone and extension cords. By Rode TRS TRRS adapter (3.5 mm female to male) black but unfortunately it does not work well. I do currently not, what else could be the problem. I can not use the cable in any case at the moment and not really rate, so currently only 2 stars.