Signal Path

I wanted to use this app to find the source of a high-pitched whine in my apartment, but it doesn't let you scroll left/right while recording, so I couldn't see the higher frequencies unless I stopped recording. I was able to figure it out, but it was inconvenient... It's also not obvious to me how you select a time range in the graph; it seems to be related to tapping with two fingers, but I can't do it reliably. Anyway, time to move the noisy thing to a different room :p thanks for the app

The app in itself is fair enough but there are limitations. First nowhere to be found is help, maybe I’m missing something but I searched and searched to no avail. Second is recording playback. I can record fine but when I try to playback all I get is about a fraction of a second of sound. Again, am I missing something? No instructions anywhere on learning the app’s functions? Again, again, am I missing something? Need help..