Radio engineer – Audio Signal Generator Review

Nice app. I was getting ready to chuck my old battery powered audio generator and went looking for an app. Haven't had a chance to test THD (that might vary by phone) but did test frequency response on an RMS volt meter. Response was absolutely flat 20 Hz to 20 kHz which says a lot about the iPhone 4 and 4S. The 0 dB setting gave -10 dB +/- 0.1 dB which is correct for an unbalanced output. Channels were balanced on two phones Four stars because the add ons are over priced and could be included as they are on other apps. 1/11/15 Add ons offered for free! I grabbed them. A very useful app. Added fifth star.
Review by Old RadioDude on Audio Signal Generator.