Kay D. Smith vs. Alex Katz - Limbo (Techno 1999)
Kay D. Smith & Alex K. Katz - Eruption
Kay D. Smith vs Alex K Katz - Blutbad (Westwood Brothers Remix) (A)
Kay D. Smith & Alex K. Katz - Neon Pusher (B1) [MIM 001]
Kay D. Smith vs. Alex Katz - Groovehunter (Schall & Rauch Rmx) (Techno 1999)
Kay D Smith vs Alex K Katz - Blutbad (Westwood Brothers Remix)
Kay D. Smith & Alex K. Katz - Basic Knowledge (Techno 2003)
Kay D. Smith & Alex K. Katz - Deep Silence
Shaping Noise
Kay D. Smith & Alex K. Katz - Shaping Noise [AT001F4]
Kay D. Smith & Alex K. Katz - Shaping Noise (Original Mix) [HQ]
COMPOSURE 06 /// KAY D. SMITH & ALEX K. KATZ - OBSERVE
MIM Man In Motion 001 A1:ERUPTION - Kay D.Smith & Alex K.Katz.
Kay D. Smith & Marc Tall Pres. Passive Resistance - Praiseworthy Tunes (Hoipolloi Mix)
Kay D Smith @ Club Raw 25-9-2005
Andreas Krämer vs. Kay D. Smith - Showdown
Kay D Smith - World FX
Kay D. Smith - Against Riot [JERK2013-36]