The new version of Capo has been released:

The new chord detection engine in Capo 4 is powered by a deep neural network that was developed and trained in-house at SuperMegaUltraGroovy using proprietary tools. “Our chord detection has always used some form of machine learning, but what we’re shipping with Capo 4 is a huge leap forward for us,” says Liscio. “It’s far more accurate, detects many more chords, and now it can even identify inversions.” Capo’s support for inversions allows it to identify the lowest note played in any given chord. For example, it can now distinguish between a C major chord that is played with a C, an E, or a G in the bass.