Many downloads claim "5.1 Dolby Digital" but are actually upmixed stereo tracks. A true 5.1 file is usually a Dual Audio Encoder file (like MKV with DTS or AC3 codec). Many fake downloads paste a 5.1 label on a 2.0 audio file, wasting your bandwidth and hard drive space.
If you possess a legal digital copy (say from a BluRay you bought online), or you are checking a file you found, use these tools to verify the audio codec. 5.1 Dolby Digital Tamil Movies Download
Tools > Codec Information. Look for Audio Codec: A52 (that is AC3 5.1) or DTS.Tamil film composers like A.R. Rahman, Anirudh Ravichander, and G.V. Prakash Kumar design their songs with layers. In standard stereo (2.0), all instruments are compressed into two channels. In 5.1, you can isolate: Many downloads claim "5
This makes watching movies like PS-1 (Ponniyin Selvan) or Jailer a theatrical experience at home. VLC Player: Play the movie, click on Tools
If you are determined to understand the technical landscape, you need to know the formats.
File Size Warning: A genuine 2-hour Tamil movie in 1080p with a 5.1 AC3 audio track (at 640kbps) will be between 2.5 GB and 8 GB. If you see a "5.1" file that is 800MB, it is fake.