Hi, this is my first post. I recently started a YouTube channel, and realized that iPhone audio isn't exactly the best. The videos we take are of social expirements. We go up to people at random, and do a random awkward thing. This is where I am having trouble. I can't have a boom mic hanging over the 'unsuspecting person' for obvious reasons. So I am left with either a wireless or wired lav mic. I have heard of people plugging lav mics into standalone sound recorders and getting good results, but was unsure of two thing: will it pick up a second subject who is about 3 feet (at max) away from the mic, ad what combination of sound recorder with mic would work best. Of course I in the edifying process would line up the audio and video.