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How to automate a “preview” file for your music.

As some of you may know I am in the throes of building my own music licensing site for just our music (no, I’m not starting another music library!). But what the heck everyone else seems to be doing it and I liked the challenge, particularly as I wanted to create it for little or no cost.

I finally have all the elements together using WordPress and the many plug-ins available. The one element I had been hitting a wall on was how to automate the creation of a few hundred MP3 “preview” files from my wav files. I needed the preview files to include a mixed in voice that says “Preview” every 5 or 10 seconds. Sure it’s easy to do one at a time but a few hundred? Nauseating drudgery to say the least.

I had been beating around the net for the last couple of months and could not find any software until I stumbled across a website today at

They have this cool little program called Audio Batch Transformer. It allows you to batch perform up to 100 files at a time of almost any task – add effects, filter(s), mix a file within, add a file to the front or end of a batch of files, add ID tags, set sample rate, convert format – and on and on! What caught my eye was the fact that it will mix in a second file (in this case my “preview” voice), normalize it and save it as an mp3.

Initially the program would only mix in the 2nd file for the length of that 2nd file. That’s a problem if your 2nd file is only a couple of seconds long. I e-mailed support that I would want my two second preview file to last the length of the first file (my music file) with selectable repeat times of “preview”. Within an hour or so MikeB had added the feature to the program. It works great and his price for personal use is to pay what you think it’s worth, with a $5 minimum! He does have a price for commercial use so you will need to contact him about that. Check out the program at Great program, great price and great support!

BTW I have no financial interest in this. I was happy to have discovered an inexpensive solution to a vexing problem and it’s worth passing on.