You can also convert TS to audio for free online with the following tools. Those are popular online file converters, and you can feel free to have a try.

1. Free Online Video Converter
FVC Free Online Video Converter is one of the largest online conversion services, which offers you various conversion options for free. You can convert TS videos to any popular audio formats, such as MP3 AIFF, ALAC, FLAC, etc. The speed of the conversion and the quality of the converted TS videos are the best available.

2. Zamzar
Zamzar is a program that can change your TS files to MP3 and other audio formats. It is compatible with any OS. Note that Zamzar’s conversion speed is quite slow, and the maximum file conversion size per day is 150MB only.

3. Online Convert
Online Convert allows users to import TS videos from desktop, URL, Dropbox or Google Drive. The maximum file size ups to 100MB. Thus, all your imported TS files should be no more than 100MB.

4. FLV2MP3
FLV2MP3 is able to convert online TS videos to MP3 or other audio formats. You can copy and paste a link of a video to its main interface. Later, you can convert it to audio with simple clicks.

5. Files-conversion
Files-conversion provides a free way to convert videos online. It is compatible with any popular video/audio format and can help you convert TS to MP3, AAC, etc. It can be considered as a good TS to audio extractor to get the TS file converted.

Reading more: https://www.free-videoconverter.net/convert-ts/ts-to-audio/