Two very different versions of Weston's compositional framework based on a cycle of pentatonic scales. Tessellations I explores the possibilities of improvising with a pre-established form as a soloist and was conceived for acoustic piano. (The composer recorded a version in 2003 on a Luthéal piano in Brussels released as Emanem 4095). Only the first half of the 2010 version by the young concert and improvising pianist LEO SVIRSKY is included here because of CD durational limitations. His interpretation of the piece is very much his own. Tessellations II explores the possibilities of improvising with the same pre-established form in a group situation. The organisation of the piece, with its use of cycles and loops, was inspired by working with Trevor Watts' Moiré Music in the 1980's. It was composed for THE VOCIFEROUS CHOIR, - nine a cappella singers mostly based around Graz in Austria - Anush Apoyan, Iris Ederer, Annette Giesriegl, Dorothea Jaburek, Sofija Knezevic, Siruan Küng, Franz Schmuck, Patrik Thurner & Veryan Weston. It is a mix of lines and layers that can be found in the polyphony of Renaissance contrapuntalists and the Pygmies of Central West Africa. There is no text or narrative, so the piece transcends any national border or literal meaning, resulting in a rhythmic tribute to the human voice that should have a very wide appeal. 76 minutes.