I may be working on a project in the future in which I'll be shooting handheld in a run-and-gun, one-man band situation. While not a necessity, I'd like to try recording some sync sound of ambient noise, passersby, and so on using a stereo mic and recorder either nearby or attached to my rig. In a perfect world, I'd have a timecode enabled audio recorder synced to a Denecke TC slate and just catch a flash of the slate at the beginning or end of each shot, but I'm just not going to have those kinds of resources. That said, does anyone have suggestions for a simple, effective sound synchronization system or method for a one person crew?
The thought of an old school bloop box / slate certainly comes to mind, although I don't know if these are still available. I'm sure I could homebrew a bloop box with a buzzer and a bright LED or strobe, but that wouldn't necessarily help with identifying the specific audio cue for each individual take. For that, I'd have to use a Sharpie or sticker on the box to indicate the take number for the camera, then verbally call out the take number for the audio recorder. It's pretty low tech, but it would probably work. I did see that there's even a Bloop Box iPhone app, but unfortunately it doesn't have the capability of displaying or announcing take numbers.
Anyway, I've thought up a couple of options, but I just thought I'd see if anyone has suggestions. As I'm going to be a one-man band, I'm trying to keep it as simple as possible.