Tessa Niles actually sang, along Rrussell on the album track, with Mike Railton doing the lead/only guitar. Tracy Ackerman wasn't on this album, she last sang on 'The Fury'
Compared what Numan did earlier this stuff was absolute crap. Cold Metal Rhythm had one song I really like that was Voix. But that's how it was with Numan from 1984 to 1994. His albums might have had one or two good songs and the rest were duds. He finally got back on track with Sacrifice and Exile.
The female backing vocals may have worked better if the songs were stronger. They were not as good as earlier material and obviously suffer in comparison.