I was playing with the iPad version and it was working but not being too accurate. Since I have a proper microphone on my Mac/USB interface I thought this might be better.
But even though I selected this interface as the recording device, when I try to record a vocal I get the same very high (probably about an octave above the top score line) note shown over and over, which bears no resemblance to what I'm singing.
I have the mic volume high (I've been recording in Audacity previously and am getting a strong signal). Am I missing some obvious step -the desktop interface isn't as intuitive as the iPad one so maybe I need to do something else first?