Abstract: Disclosed herein is a sound synthesis system for generating a user defined synthesised sound effect, the system comprising: a receiver of user defined inputs for defining a sound effect; a generator of control parameters in dependence on the received user defined inputs; a plurality of sound effect objects, wherein each sound effect object is arranged to generate a different class of sound and each sound effect object comprises a sound synthesis model arranged to generate a sound in dependence on one or more of the control parameters; a plurality of audio effect objects, wherein each audio effect object is arranged to receive a sound from one or more sound effect objects and/or one or more other audio effect objects, process the received sound in dependence on one or more of the control parameters and output the processed sound; a scene creation function arranged to receive sound output from one or more sound effect objects and/or audio effect objects and to generate a synthesised sound effect in dependence o

Abstract: Disclosed herein is a sound synthesis system for generating a user defined synthesised sound effect, the system comprising: a receiver of user defined inputs for defining a sound effect; a generator of control parameters in dependence on the received user defined inputs; a plurality of sound effect objects, wherein each sound effect object is arranged to generate a different class of sound and each sound effect object comprises a sound synthesis model arranged to generate a sound in dependence on one or more of the control parameters; a plurality of audio effect objects, wherein each audio effect object is arranged to receive a sound from one or more sound effect objects and/or one or more other audio effect objects, process the received sound in dependence on one or more of the control parameters and output the processed sound; a scene creation function arranged to receive sound output from one or more sound effect objects and/or audio effect objects and to generate a synthesised sound effect in dependence o

Abstract: While a cardiac device is in AAI(R) mode, a ventricular channel is monitored for a premature ventricular contraction (PVC). In response to detecting a PVC while the device is in AAI(R) mode, a refractory period is started in an atrial channel to prevent a retrograde atrial event that may occur due to the PVC from resetting an atrial escape interval (AEI). Additionally, during such a relative refractory period in the atrial channel, the atrial channel is monitored for a retrograde atrial event that may occur due to the PVC. If a retrograde atrial event is detected, then the refractory period in the atrial channel is terminated, and an antegrade conduction restoration interval (ACRI) is started. The ACRI is a programmed period that specifies how long to wait after a retrograde atrial event is detected before pacing the atrium.

Abstract: While a cardiac device is in AAI(R) mode, a ventricular channel is monitored for a premature ventricular contraction (PVC). In response to detecting a PVC while the device is in AAI(R) mode, a refractory period is started in an atrial channel to prevent a retrograde atrial event that may occur due to the PVC from resetting an atrial escape interval (AEI). Additionally, during such a relative refractory period in the atrial channel, the atrial channel is monitored for a retrograde atrial event that may occur due to the PVC. If a retrograde atrial event is detected, then the refractory period in the atrial channel is terminated, and an anograde conduction restoration interval (ACRI) is started. The ACRI is a programmed period that specifies how long to wait after a retrograde atrial event is detected before pacing the atrium.