Check out this extraordinary music. If you're short on time, start with the last 2 minutes of the video. Otherwise, maximise your screen, turn up your speakers, and let yourself be completely absorbed by the sound.

This is the beginning of a project that is remarkable in very many ways.

Listen to the A Cappella voices of Tonus Peregrinus, as they sing the exquisite harmonies of Lux Aeterna from Antony Pitts' new Requiem for the Time of the End (layered with a couple of long notes from me).

The extraordinary acoustic of St Peter's Italian Church in London, itself a Roman basilican marvel from 1863, lends an ethereal otherworldliness to the sound.

This music is truly ecstatic, in the mystical sense. I can barely believe it's recorded just on an iPhone. Have a listen:

Requiem for the Time of the End is a big piece of music, and bringing it to life is going to be a big project. Antony wrote the first bits of it as far back as the 1980s; it's now taking shape as a massive, 28-movement masterpiece about life, death, and the connection between the two.

A lot of the music is very slow because it's to do with the gradual unfolding of time and life, revolving around the human heartbeat (the music sounds slow; but there's always an inexorable pulse driving it forward). Any moment could be the end, so every moment is precious.

There's a lot more to say about this emerging Requiem. We've recorded some other movements already, and will be doing more in January. I'll be writing and filming more about the project soon.

And we'd love to put together a live performance of it in the not too distant future. If you can help with that, let me know...