A great utility that does batch renaming is iView (IrfanView). It's free but I end up donating from time to time for the time it saves me.
https://www.irfanview.com/Paj
8^)
The batch renaming in irfanview is for graphic files not audio files (BiaB, wav, mp3, etc).
Mario: It's for any files. The default viewer comes up for "Common Graphic Files"---just use the dropdown to select "All (*.*)" filesPaj, if you use it for audio files please let us know how you do it. I tried and it will not work audio files. Note that I am using the latest version of irfanview. Maybe a previous version works for audio?
[i][/i]
I haven't found a type of Window file it will not rename, with many options for the process. The file conversion process may be graphics specific but the renaming is definitely not---and there's really no reason it should be. I've been using it for renaming going on two decades or so.
Mario, I hesitate to give a step by step, not only because the info can be garnered in the iView help files, but mainly because some *%^&*@ will follow the directions and permanently loose/screw-up their files. So . . .
DISCLAIMER: DON'T FOLLOW THE FOLLOWING DIRECTIONS WITH IRREPLACEABLE OR UN-ARCHIVED FILES UNTIL YOU HAVE TRIED THEM WITH SCRATCH FILES AND ARE SURE HOW TO SUCCESSFULLY DO THE BATCH RENAME. ESPECIALLY AVOID ANY "REPLACE/RENAME ORIGINAL FILES" OPTIONS UNTIL/UNLESS YOU ACTUALLY KNOW WHAT YOU'RE DOING AND ACCEPT RESPONSIBILTY FOR THE RESULTS.
. . . but Mario, since it's you:
(1) Select Batch Conversion/Rename from the File Menu. You'll get this window:
https://www.dropbox.com/s/kpeqz8grbrwbs43/BatchRenameScreen1%28Marked%29.jpg?dl=0
(2) Select Batch Rename
(3) Use the "Files of type" dropdown window to select "All (*.*)" files
(4) Navigate to and select (highlight) the files you want to rename in the "Look in:" window, then use the buttons above the "Input files:" window to add them to the input files list.
(5) Set your desired naming pattern in "Batch rename settings: Name pattern" window.
Definitely click on the [Options] button to bring up the options window---and then click on the [Help] button to see the renaming patterns/options that are available to you. In my example I rename the files "NewNameForOldnames001...006
https://www.dropbox.com/s/bmqem9lwvw6rufv/BatchRenameScreen2%28Marked%29.jpg?dl=0
https://www.dropbox.com/s/1grgvk3o4aw15io/BatchRenameScreen3%28Marked%29.jpg?dl=0
(6) Select your Output Folder. This could be any existing folder or a folder that is created by/during the renaming process. In my example, I "Browsed" to my original folder, selected that, and added "\Renames" at the end of the line to create a target folder that didn't exist.
(7) Select the [Run test rename] for a non-destructive test run.
If your satisfied with the displayed results, select the [Start Batch] button.
Sorry I didn't reply sooner---life.
Paj
8^)
BTW: iView 4.59 64-bit. Also worked with v4.54 32-bit.