I'm very late with this, but Earl over at
TheOneRing.net interviewed Hilary Summers regarding her experiences working with Howard Shore on "Gilraen's Song" in
The Fellowship of the Ring. An excerpt:
HILARY SUMMERS
At the time they were looking for vocalists I’d been working a lot with Michael Nyman and had done a few soundtracks with him, and the agent or ‘fixer’ who had been in the sessions happened to take my details. Luckily for me she was asked if she knew anyone with a low voice and she sent a demo cd over to Howard Shore and I was booked. A fax was sent with the music (only a solo line and the text) and I went to the recording session and did my stuff.
Do check it out at your convince right
HERE!