Maybe I’m using it wrong, but the Dwarf tuner seems to not be very good at recognising any pitches much above C3. Have occasionally got it to register up to C5, but nothing higher then that on my instrument (harp). This is just a limitation of the tuner?
I’ve taken to putting an external tuner into the signal chain, although that somewhat defeats the point of having one on the dwarf itself. But it least I can actually tune the instrument then.
Maybe it’s just my instrument and other people have more luck.