Yamaha’s TF series, digital mixer for PA, have characteristics of compact bodies and intuitive operability with their touch panels. In this episode, we will focus on some examples on introducing rack mount type. TF-RACK is a new model that was released at the end of 2017, which realized further miniaturization from the traditional surface type model. The 3U casing is a compactly equipped with 16 microphones and 16 line in-and line outs, having a maximum mixing capacity of 40 line ins. Moreover, it can be connected with the audio network, Dante by adding an expansion board NY64-D. Since We have heard that it is being used in SHIKI THEATRE COMPANY’s “The Phantom of the Opera”, I have visited the venue KAAT (Kanagawa Arts Theatre) for an interview.