Finally downloaded and listening to an NHK television programme: (アニメ)MUSIC JAPAN 新世紀アニソンSP 完全版 originally broadcast on 24 August 2009 with Nana Mizuki, Angela, Minori Chihara, May'n, Chiaki Ishikawa, Minami Kuribayashi, Himeka and Scandal.
PS, found that the web pages for Music Japan from 2009 were still up:
Sound Horizon - Hi iro no Fuusha [TTE III Live Day 1]
Sound Horizon's live performance of the song Hi iro no Fuusha, originally from the single Shounen wa Tsurugi wo, from the TTE III Live day 1. This version has the main vocals by KAORI, with back-up provided by Mari Endou and YUUKI. Narration is by Jimang. https://www.youtube.com/watch?v=jwUxHpDCOww
@Seasonreaper - that's the good thing with recorded music these days, you can make up your own play-lists of whatever you like, a bit more easily than the "mix tapes" on cassette back in the 70's and 80's and part of the 90's.