As cellist of the Kronos Quartet for more than two decades, Joan Jeanrenaud was part of one of the most exciting ensembles in contemporary music. But for the past three years she has devoted herself to a solo career, and an exploration and expansion of the cello's role and repertoire. This show, Metamorphosis, is a programme of new works that features live performance with electronics, visuals and music theatre.

The ambience of the whole evening is created by three movements from Philip Glass's Metamorphosis, originally a solo piano work but here arranged by Jeanrenaud for live cello playing against three taped versions of itself. Specially created videos accompany Glass's hypnotic music with images of watery chaos and digital abstraction. There are some beautiful moments, such as the amorphous fractals in Monty Thompson's film for the second movement, but for the most part the combination of music and visuals is curiously uninvolving.

There is a fine line between hypnosis and tedium, and the rest of the programme largely falls the wrong side. There's no doubting the diverse sources of pieces such as Hamza El Din's Escalay, based on the rituals and tuning systems of Nubia, or Jeanrenaud's own Altar Piece, an improvised meditation on death for electronic cello. But when nearly all of the music is static or contemplative, there is no room for the dramatic metamorphosis that the title of the show promises us. Far from creating any sense of adventure or experiment, the live electronic manipulation and multimedia sophistication only emphasise the blandness of most of the music.

However, Steven Mackey's Cairn breaks the mould. The piece is a volatile lament made up of memorable melodic fragments, and it at last allows Jeanrenaud to demonstrate the expressive range of her playing.

But the most powerful symbols of the show's approach to the avant-garde are the performances of two pieces by Yoko Ono. Lighting Piece is for a performer who lights a match and waits for it to go out, while Wood Piece is made by hitting any piece of wood - in this case, Jeanrenaud's cello. These works used to be emblems of radical experimentalism. But in this context, they are as middle-of-the-road as the rest of the programme.

· At the Queen Elizabeth Hall, London SE1 (020-7960 4242), tonight, then touring.