Ashun Sound Machines HSLX 73-Key Hydrasynth Deluxe With Dual Sound Engines & PolyTouchThe HYDRASYNTH DELUXE is the flagship Hydrasynth, offering a dual sound engine setup and the largest ASM PolyTouch polyphonic aftertouch keybed to date. The user interface is designed with the utmost attention to detail and offers a rapid workflow Each of the two sound engines features 3 Oscillators, dual Wave Mutators and 2 filters, that can be configured in series or parallel. Both of the sound engines has its own separate balanced analog audio