# Introduction

This section provides some examples to help with the most common use cases:

## [📄️How to programmatically enable or disable audio tracks](https://docs-preview.optiview.dolby.com/pr-863/theoplayer/v10/how-to-guides/mediatrack/how-to-enable-disable-audio-tracks.md)

[This article describes how you can use the MediaTrack API to enable or disable audio tracks.](https://docs-preview.optiview.dolby.com/pr-863/theoplayer/v10/how-to-guides/mediatrack/how-to-enable-disable-audio-tracks.md)

## [📄️How to programmatically detect audio tracks](https://docs-preview.optiview.dolby.com/pr-863/theoplayer/v10/how-to-guides/mediatrack/how-to-detect-audio-tracks.md)

[This article describes how you can use the API to detect audio tracks.](https://docs-preview.optiview.dolby.com/pr-863/theoplayer/v10/how-to-guides/mediatrack/how-to-detect-audio-tracks.md)

## [📄️How to programmatically select a video track quality](https://docs-preview.optiview.dolby.com/pr-863/theoplayer/v10/how-to-guides/mediatrack/how-to-select-video-track-quality.md)

[This article describes how you can use the API to select a video track quality. If you select a specific quality, you overrule the ABR algorithm.](https://docs-preview.optiview.dolby.com/pr-863/theoplayer/v10/how-to-guides/mediatrack/how-to-select-video-track-quality.md)

## [📄️How to programmatically detect video track qualities](https://docs-preview.optiview.dolby.com/pr-863/theoplayer/v10/how-to-guides/mediatrack/how-to-detect-video-track-qualities.md)

[This article describes how you can use the API to detect video track qualities.](https://docs-preview.optiview.dolby.com/pr-863/theoplayer/v10/how-to-guides/mediatrack/how-to-detect-video-track-qualities.md)

## [📄️How to start with a specific quality?](https://docs-preview.optiview.dolby.com/pr-863/theoplayer/v10/how-to-guides/mediatrack/how-to-start-with-specific-quality.md)

[This question is typically asked because developers want their HLS or MPEG-DASH stream to start with a specific rendition of the manifest. They want to implement this use-case to speed up the time-to-first frame, or to serve a better quality to the customer, or to serve a different quality on different platforms.](https://docs-preview.optiview.dolby.com/pr-863/theoplayer/v10/how-to-guides/mediatrack/how-to-start-with-specific-quality.md)

## [📄️How to reduce data usage on mobile devices](https://docs-preview.optiview.dolby.com/pr-863/theoplayer/v10/how-to-guides/mediatrack/how-to-reduce-data-usage-on-mobile-devices.md)

[Customers that use THEOplayer in mobile web which leverage THEOplayer's preloading capabilities (preload = "auto"), or provide very high qualities, sometimes receive complaints about data usage.](https://docs-preview.optiview.dolby.com/pr-863/theoplayer/v10/how-to-guides/mediatrack/how-to-reduce-data-usage-on-mobile-devices.md)

## [📄️How to programmatically detect video track quality changes](https://docs-preview.optiview.dolby.com/pr-863/theoplayer/v10/how-to-guides/mediatrack/how-to-detect-video-track-quality-changes.md)

[This article describes how you can use the API to detect video track quality changes.](https://docs-preview.optiview.dolby.com/pr-863/theoplayer/v10/how-to-guides/mediatrack/how-to-detect-video-track-quality-changes.md)

## [📄️How to programmatically detect audio track changes](https://docs-preview.optiview.dolby.com/pr-863/theoplayer/v10/how-to-guides/mediatrack/how-to-detect-audio-track-changes.md)

[This article describes how you can use the THEOplayer API to detect audio track quality changes.](https://docs-preview.optiview.dolby.com/pr-863/theoplayer/v10/how-to-guides/mediatrack/how-to-detect-audio-track-changes.md)