I am having trouble increasing the quality of my sound in the videos I film. I am working on a very low budget because I am a student, I use mostly an iphone and a lavallier. This doesn’t seem to be enough. I know that pros use special gear to separately film (or purchase) background sounds such as steps, wind etc. I would want to try and record some of it myself with my gear. Also, when people speak in my videos, their voice is not so clear if I film outside and there is traffic.