What Murdabike's Rachel Blackburn described as the ''quite trancey, multiple drum machines and synthesisers, electronic'' act found the window ''steamy''.
''It got really steamy - a bit of a goldfish bowl effect really.''
''It was great to see people walking by with all different reactions - it was really great.
''Lots of smiling faces, definitely, and some kind of confused faces as well.''
Yesterday's act involved ''something special for the Fringe'' - using an exercycle to power or ''trigger'' the synthesizer.
''It's a bit of a novelty pedalling the bike and affecting the synthesizer at the same time,'' Blackburn said.
''A bit of a gimmick and a bit of fun.''