Add Playback Speed Control for Audio Clips

[sinoyuhanxiao]

Feature Description

Implement playback speed controls that allow users to listen to audio clips at different speeds (e.g., 0.5x, 0.75x, 2x), facilitating detailed auditory analysis or practice.

Expected Behavior

• Users can select playback speeds from a set of predefined options.
• The audio playback adjusts in real-time as the speed setting is changed.

Use Case

This feature is particularly useful for musicians and language learners who need to hear audio at slower or faster speeds to better understand or practice the content.

Technical Considerations

• Incorporate a robust audio processing tool that supports speed adjustments without significant loss of audio quality.
• Provide a smooth user experience where speed changes are applied seamlessly.

[sinoyuhanxiao]

Also should allow concatenation with multiple audio clips, maybe with different speed changes.

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