It's NOT crankwalk. The sound happens with or without the clutch depressed. It is RPM dependant. It is too random to be a bearing too. It sounds like the same noise I had when a balance shaft bearing worked it's way out.

92 talon esi, 91 talon
91 talon tsi AWD, 95 talipse AWD 12.4 RIP
95 talon AWD, 99 Syder AWD project