Add Volume Slider Feature -- 2

Project Description:"Hello! I am using the Pmotion video/GIF maker plugin on my WordPress site (Elementor Pro). The plugin is built on top of FabricJS and jQuery. It works perfectly, but the current version completely lacks a volume control feature for audio tracks and video layers.Your Task:Implement a working Volume Slider into the editor's UI (timeline or properties panel) to control the gain/volume of audio and video clips. This needs to be handled via Web Audio API or FabricJS media element options.Technical Constraints:The website is hosted on a standard shared cPanel server (NO Docker, NO root access). The solution must be completely client-side.The core functionality of the Pmotion plugin (keyframes, export, canvas rendering) must remain fully intact.Please provide your time estimate and budget for this custom modification. Thank you!"