hi ksaj, frettr has that feature- it's just denoted as "tune up 1/2 step" because the chords are tuned up in the recognition process. I'll change it to "tune down 1/2 step" though because I see how it's confusing. I'm a big SRV and Hendrix guy, so I couldn't forget to add this in development though. thx for the feedback! -grudnyai22
It should be called "transpose up 1/2 step". E.g. if the song has an Eb m chord that you'd like to play using an Em fingering on your detuned instrument, the notation needs to be transposed up 1/2 step.