Recording of Alcides Lanza's Un Mundo Imaginario, for choir, with electronic and computer sounds. The text is taken from ekphonesis V [1979], from Alcides lanza's Trilogy. The bilingual aspects of the text has been preserved. By means of syllabic and phonemic fragmentation - both in the studio for the creation of the tape part, and in the writing for the choir. The sounds on tape bring certain vocal qualities into focus and extend the choral material. The instruments used for the production of the tape were Sennheisser MD421 microphopnes, Revox A77 and DAT tape recorders, Akai S900 sampler, Macintosh SE computer with Sound Designer, plus Lexicon and Yamaha special effects units. The tape was realized at the SHELAN Studios and finalized at the EMS, McGill University. Premiered by Iwan Edwards and the McGill Concert Choir at Pollack Hall, November 16, 1989. Written at the request of choir conductor Iwan Edwards and dedicated to him.