Potential Paths: Path 1: Use Nolej to take existing video and audio content and turn them into engaging and interactive learning materials. This will give you the media library you need with a degree of interactivity. It may lack a filtering option, but you can organize the digital materials locally based on your preference. Path 2: Leverage both Nolej and ElevenLabs. With Nolej, transform existing content into "micro-learning packages." To enhance this content, use ElevenLabs to generate synthetic voices to narrate over your media material.

Final Narrative: From the available tools, the best route to address your need of a media library with specific listening practice materials is by utilizing Nolej and ElevenLabs together.

Start with Nolej, an AI-driven tool that can turn your video, audio, and text documents into interactive "micro-learning packages". Not only does this increase the engagement level for your materials, but also it allows you to customize your assets to align with certain learning goals. This way, you can ensure a rich range of media resources for listening practice.

On the other hand, to enhance your auditory materials, you can use ElevenLabs, which allows you to create lifelike synthetic voices for your multimedia content. This can be especially beneficial for language lessons, as it supports up to 30 languages and can impart consistency in the voice used across different languages and materials.

By combining the functionalities of these two platforms, you can create a robust media library for listening practice. The combination of interactive elements from Nolej and synthetic voices from ElevenLabs will enrich your teaching experience and offer appealing resources for your students. Although a direct filtering option might be missing, you can manage your media assets locally and organize them based on your requirements.

Please keep in mind that these tools do require setup time and regular maintenance. Also, while Nolej integrates with platforms like Google Classroom, Moodle, and others, ElevenLabs does not mention such integrations. However, both tools promise to be user-friendly, minimizing the learning curve for you as the educator.