s_p_l_o_d_e
I saw Martin open for Ichiko Aoba during her US tour, and though his solo-guitar approach sounded sparse at first, gradually he filled out the space with just his voice and guitar, pushing his voice to envelop the audience.
Then he and Aoba played "Daisy" together, Aoba looping an arpeggio on her Yamaha Reface CP, Martin on guitar, and both of them coaxing the crowd to sing the lead piano melody.