MIDI commands provide an abstract representation of audio in terms of note-on and note-off times, velocity, and controller data. The relationship of these commands to the actual audio signal is dependent on the actual synthesizer patch in use. Thus, it is hard to implement effects such as compression of the dynamic range or time correction based on MIDI commands alone. To improve on this, we have developed software that silently computes a software synthesizer’s audio output on each parameter update to support editing of the MIDI data based on the resulting audio data. Precise alignment of sounds to the beat, sample-correct changes in articulation and musically meaningful dynamic compression through velocity data become possible.
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