Hi guys, I cannot interact directly on the mailing list for some reason and had to post my question via email. I have just installed SoX and upon running it I only get a back window appearing momentarily and then vanishes. Consider me a complete noob and treat me with some patience. I need to combine several mono wav samples to corresponding stereo files. I am running Windows 10 not linux. The files are in folder and named as as follows: Basson16L ....rel00150 ........036-C ........037-C# ........038-D ........etc ....rel00600 ........036-C ........037-C# ........038-D ........etc ....rel99999 ........036-C ........037-C# ........038-D ........etc 036-C 037-C# 038-D etc Basson16R ....rel00150 ........036-C ........037-C# ........038-D ........etc ....rel00600 ........036-C ........037-C# ........038-D ........etc ....rel99999 ........036-C ........037-C# ........038-D ........etc 036-C 037-C# 038-D etc Each subfolder has similarly names files as shown. I need to merge corresponding lefts and rights to output as new stereo files in new folders bearing the original name of the instrument (organ stop in this case) and subfolders and I want to ensure the appropriate files are merged together. Identical names exist in the subfolders that bear the release/ tail of a wave profile because each must correspond to the corresponding main file when eventually played in the appropriate software. Those of you who may have processed sound files for jOrgan, GrandOrgue or Hauptwerk know what I am talking about. How do I get to use SoX for this exercise. Total files I need to process run into 2000+ mono files x 2 to get 2000+ stereo files. That's a lot to process manually!!! I hope that loops and markers (cues) are not erased in the process!!! Regards Mark (marcusfb(at)gmail.com) --- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus