This gadget hasn't gotten the use hoped for. The teenage lion of many decades ago dreamed of having an open reel tape teck & sounding like Van Cliburn. The closest he ever got was the mighty Technics RS-BR465, but that Yamaha C3 still sounded terrible. The biggest leap toward the Van Cliburn sound came from getting better piano teachers, years of practice, better instruments, & digital editing.
Now the lion kingdom made better gear than anything that existed decades ago. Given what this circuit revealed about the noise introduced by just millimeters of wire & any single ended analog signal, any tape head or stylus is a gigantic radio receiver. There's no way any open reel tape deck or record player could ever compete with even a 16 bit digital system at 48khz. They can only color the sound & introduce a musical form of noise.