Abstract: Multiple kernel-mode audio processing modules or filters are combined to form a module or filter graph. The graph is implemented in kernel-mode, reducing latency and jitter when handling audio data (e.g., MIDI data) by avoiding transfers of the audio data to user-mode applications for processing. A variety of different audio processing modules can be used to provide various pieces of functionality when processing audio data.

Abstract: An audio signal processing device has input and output devices, a processor, an accelerator device in communication with the foregoing, and a memory for a storing a driver containing multiple filters of an audio filter graph. The driver controls the accelerator device. The filters contained within the driver can be executed by the accelerator device. Each filter transforms and outputs audio data in a predetermined manner. One filter mixes audio data received by the input device and another renders the mixed audio data for output by the output device. Global effect filters and acoustic cancellation filters can follow the mixing filter to, respectively, achieve a global effect on all input audio data and to cancel echoes therefrom.

Abstract: Multiple kernel-mode audio processing modules or filters are combined to form a module or filter graph. The graph is implemented in kernel-mode, reducing latency and jitter when handling audio data (e.g., MIDI data) by avoiding transfers of the audio data to user-mode applications for processing. A variety of different audio processing modules can be used to provide various pieces of functionality when processing audio data.