xSonic's audio interface, the XTONE. This interface comes with a MIDI-controllable footswitch, so you can use the sounds you create at home on stage if you bring your equipment. I was using the mobile versions of BIAS AMP and FX on my iPad/iPhone to create a compact system. Although it's not really an "extra," I'll include an Oyaide electric audio-grade USB cable, the d+USB Type-C classB/2.0 (currently selling for 4,980 yen at Soundhouse). ■ Specifications ・Input Impedance: 1M Ω ・Unbalanced Output Impedance: 100 Ω ・Balanced Output Impedance: 200 Ω ・Frequency Response: 10 Hz ~ 21 kHz ・Sampling Rate: 44.1k, 48k, 88.2k, 96k, 176.4k, 192k Hz ・Sampling Depth: 24 bit ・Dynamic Range: 108 dB ・THD+N Characteristics: 0.001% ・USB Power Input: 5V DC ・9V Power Input: 9V DC ・Power Consumption: 100 mA ・Size: 129 (D) x 98 (W) x 57 (H) mm ・Weight: 355 g