Abstract: An embodiment of a system to synchronize data streams is described. During operation, the system receives a first data stream having a first data type and performs a sequence of operations on at least a portion of the first data stream. Next, the system stores metadata associated with the first data stream one or more times during the sequence of operations. Metadata can include a time stamp, data-stream information associated with the portion of the first data stream, and event information associated with the occurrence of one or more events during the sequence of operations. Moreover, the system provides a notification based on the stored metadata, the notification to facilitate synchronizing the first data stream with a second data stream having a second data type.

Abstract: An embodiment of a system to synchronize data streams is described. During operation, the system receives a first data stream having a first data type and performs a sequence of operations on at least a portion of the first data stream. Next, the system stores metadata associated with the first data stream one or more times during the sequence of operations. Metadata can include a time stamp, data-stream information associated with the portion of the first data stream, and event information associated with the occurrence of one or more events during the sequence of operations. Moreover, the system provides a notification based on the stored metadata, the notification to facilitate synchronizing the first data stream with a second data stream having a second data type.

Abstract: Apparatus and corresponding methods, referred to as “stealth recording,” in which long audio segments are recorded into a buffer, then separated into individual phrases for auditioning and application. Stealth recording surreptitiously and continuously records audio processed thereby, then separates, catalogues, and time stamps the audio into phrases using, among other techniques, spectral analysis that compares the recorded audio to a sample of the ambient noise floor. This allows a user to instantly locate any phrase and audition or apply it within its proper context. This has numerous practical applications, ranging from musicians who wish to improvise then apply their most inspired phrases to a particular song, to students reviewing a lecture and replaying audio phrases in context with the visual information present at the time of the audio recording.

Abstract: The present invention provides a method for editing digital audio information, such as musical material. Original musical parameters (302) are extracted and/or inputted from recorded original digital audio material (300). The original musical parameters (302) are then edited. The resulting edited musical parameters (304) are compared to the original musical parameters (302) to provide time varying control functions (308, 310, 312). The original digital audio material (300) is then processed with signal processing algorithms (314, 316, 318) which are controlled by the time varying control functions (308, 310, 312). This processing changes the original digital audio material (300) into new digital audio material (320) having musical characteristics which correspond to the edited musical parameters (304).