Good app. M

Good app. Great for finding resonant frequencies and evaluating sound levels. Would be nice if it could be calibrated especially on low ends. Low end is always low. I am also curious about response on ends if I actually had a decent mic but still great app. Also entire spectrum rises when music played. Would prefer if zero level remained flatter.

Bluej777 about Octave: An RTA for the iPhone, v1.3