Implement a Precise and Adjustable Metronome Feature

[brylie]

This issue proposes the addition of a metronome feature to the piano learning app. A metronome is essential for practicing timing and rhythm, and this feature will allow users to select a Beats Per Minute (BPM) setting and hear a steady metronome sound at that tempo. The accuracy and consistency of the metronome's timing are crucial to avoid confusion and frustration during practice.

Objectives

• Adjustable BPM: Users should be able to select their desired BPM for the metronome.
• Steady and Accurate Timing: The metronome must maintain a consistent tempo without drifting.
• Clear Auditory Cue: The metronome sound (click or similar) should be clear and distinct.
• Easy Access and Control: Users should find it easy to access and control the metronome settings during their practice.

Implementation Details

1. Metronome UI: Develop a user interface element that allows users to select and adjust the BPM.
2. Sound Generation: Implement a sound system that plays a metronome click at the selected BPM. Consider using Godot's AudioStreamPlayer.
3. Precision Timing: Ensure that the timing mechanism driving the metronome is precise. This may involve using Godot's OS.get_ticks_msec() or similar high-precision time functions.
4. Volume Control: Include an option to adjust the metronome's volume.

Requirements

• Development of a UI component for the metronome controls.
• Creation or sourcing of a suitable metronome click sound.
• Implementation of a timing system for accurate BPM playback.
• Testing the feature across a range of tempos for accuracy and consistency.

Impact

• The metronome feature is a fundamental tool for any musician, and its inclusion will significantly enhance the app's utility for practicing timing and rhythm.
• Precise and reliable metronome functionality is crucial for a positive user experience, especially for users who are keen on developing their rhythmic skills.

Next Steps

• Design and implement the metronome UI.
• Develop the audio playback system for the metronome sound.
• Create the timing mechanism to ensure consistent BPM.
• Conduct thorough testing at various tempos and on different devices to ensure reliability.