Variable Tempo Audio Adjustment in Digital Audio Workstations
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Solution Overview
Problem
Conventional digital audio workstations (DAWs) lack the ability to independently adjust the tempo of an audio file without affecting its pitch, and do not provide a graphical interface to set initial and end tempo or length for variable tempo adjustments within a musical arrangement, which limits creative control over audio and MIDI files.
Innovation Solution
A computer-implemented method that allows users to adjust the tempo of an audio file independently of a global tempo in a musical arrangement by displaying a graphical user interface (GUI) where users can set initial and end tempo and duration for variable tempo adjustments, using resampling algorithms to maintain pitch consistency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If conventional DAWs adjust the tempo of an audio file, then the tempo changes, but the pitch also changes
Solution Approach 1:
The patent applies parameter changes by implementing time-stretching algorithms that independently manipulate the tempo parameter while preserving the pitch parameter. The system processes audio samples through mathematical transformations that separate temporal scaling from frequency content, allowing tempo adjustment without pitch deviation. This resolves the contradiction by changing the state of the audio signal in a way that modifies speed while maintaining tonal accuracy.
2Stability of the object's composition
If conventional DAWs provide global tempo control, then all tracks are synchronized, but individual track tempo variation is limited
Solution Approach 1:
The patent applies segmentation by dividing the tempo control function into two independent layers: a global tempo controller that synchronizes all tracks, and individual track-specific tempo controllers that allow independent tempo variation. Each audio track can have its own tempo envelope or time-stretching parameters while still maintaining alignment with the global tempo structure. This resolves the contradiction by segmenting the tempo control system into hierarchical levels, enabling both synchronization and individual flexibility simultaneously.
3Adaptability or versatility
If DAWs provide detailed tempo adjustment controls, then creative control is enhanced, but the interface complexity increases
Solution Approach 1:
The patent applies universality by designing a multi-functional graphical interface element that can perform multiple tempo control operations. The same interface component serves as a tempo display, an editable parameter field, and a visual indicator of tempo changes. Users can access detailed tempo adjustment options through a unified interface that adapts its functionality based on user interaction, rather than requiring separate controls for each function. This resolves the contradiction by making the interface universal, reducing complexity while maintaining versatility.
Data Source
AI summary
A computer implemented method allows a DAW to adjust a variable tempo of an audio file independent of a global tempo. The method includes causing the display of a musical arrangement having a global tempo. The musical arrangement includes an audio file having a variable tempo which is independent of the global tempo. The method includes adjusting the variable tempo of the audio file, wherein the variable tempo begins at an initial tempo and adjusts to an end tempo over a set length of time. The method can also include outputting the audio file having the variable tempo in response to a command to play the musical arrangement.