The conditions under which Schubert's art of the song developed into a kaleidoscopically incandescent spectrum that crossed over genres and the institutionally set, historical boundaries disappear today as a rule under the pedestal that the late nineteenth century began to erect for the composer. The traces of improvisational practice were increasingly lost within a music culture that stylized the printed manuscript into a quasi sacred object. A particularly successful way of leading back to a fundamental impetus in Schubert's art of the song is through an approach towards the songs that takes the moment of spontaneous performance seriously as a communicative act, without denying the work character of Schubert's music. The idea of 'one' universal human voice seems to materialize with particular intensity in the commingling of two voices of similar timbre, which can permanently interchange and double their identity. Based on our knowledge for instance of the Schubertiade reminiscences of 1868, remembered and noted down by Moritz von Schwind, can we not imagine that the 'Schubert singers' Johann Michael Vogl and Karl von Schönstein might indeed have sung alternately (or even in unison)? This is an interesting project, with programme based on Schubert's Lieder arranged for two tenors and piano.