Feature request for basic audio track editing controls within Recordly's video editor.

**Is your feature request related to a problem? Please describe.**
I'm always frustrated when I need to adjust audio levels or mute tracks while editing videos. Currently, the lack of basic audio track controls makes it difficult to synchronize audio with video clips or to manage background music effectively. This often leads to a time-consuming trial-and-error process, which disrupts my workflow and affects the overall quality of my projects.

**Describe the solution you'd like**
I would like to see the addition of basic audio track controls within the video editor. This should include features such as:
* Volume adjustment sliders for each audio track
* Mute and solo buttons for quick audio management
* Fade in and fade out options for smoother transitions
* A visual waveform representation of audio tracks for better editing precision

**Describe alternatives you've considered**
I have considered using external audio editing software to manage audio tracks separately, but this adds unnecessary complexity to the workflow. Additionally, some competitors offer limited audio controls, but they still do not meet the needs for comprehensive audio management directly within the video editing interface.

**Additional context**
Implementing these audio track controls would greatly enhance the user experience and efficiency of the video editing process. It would allow editors to make real-time adjustments and improve the overall sound quality of their projects.