Will downmix your 5.1 surround sound into standard left/right stereo. Step-by-Step: How to Convert DTS 5.1 Using HandBrake

: Freeware, supports all modern audio codecs, simple interface. Cons : Windows only, fewer advanced features than competitors.

Click the Video tab. Under Mode , select Copy . This ensures your video is not re-encoded, saving hours of processing time and preserving 100% video quality.

Batch conversion and keeping 5.1 surround sound intact.

TFM Audio Tool specializes in audio extraction from video containers (AVI, MKV, MOV, MP4, RMVB) and can convert AC3, DTS, WAV, and MP3 streams. A standout feature is the ability to upmix stereo audio to 5.1 AC3 or DTS.

: Dedicated "Audio Only" or "Video Copy" modes; allows precise channel configuration (5.1 layout). Cons : Windows only; interface looks slightly outdated. 4. Audacity with FFmpeg Library (Best for Audio-Only Files)

This Chinese freeware from 360 Software supports an extensive list of audio formats including DTS, MP3, WAV, OGG, FLAC, MP2, M4A, AC3, AMR, WMA, AIFF, AAC, APE, and many proprietary encrypted formats. It includes audio merging, video-to-audio extraction, audio compression, and video-audio extraction capabilities.

FFmpeg is a command-line tool that powers most modern media software. It is incredibly fast because it can convert the audio stream while directly copying the video stream without re-encoding.