car audio absolute need

this app combined with the switcheasy thumbtack microphone makes a very, very accurate method of tuning in your car stereo.

when results are compared to an expensive audiocontrol RTA, the margin of diff. is negligible.

i highly recommend this app.

btw, the microphone sold by this company is also excellent, and an even better match then the above mentioned mic.

smaugthewyrm about RTA