We recommend using iTunes to convert your audio files into a format that's compatible with Instant Teleseminar.  

Here's what to do:

In windows, go to (Edit > Preferences > General) and click on the Import Settings button next to where it says Ask to Import a CD. In Mac, go to (iTunes > Preferences > Generaal) and click on the Import Settings button. 

Note that you'll click on this import settings button even if you are not importing a CD and just converting an MP3 that you already have on your computer:

You will then see a popup window, where you will select Import using: MP3 encoder.

For the Setting, select "custom..." and another pop up box will appear. 

Then you should select a 48 kpbs stereo bit rate...

...and uncheck the VBR box.  Select 22.05 KHZ for the sample rate, and set the channels to mono.  Then check the smart Encoding Adjustments and Filter Frequencies below 10 Hz buttons:

and you should be ready to go! Confirm all the changes to your settings, and then select the recording from the itunes library.

Go to (Advanced > Create MP3 version) and you should see the conversion process starting:

 Once it has completed, simply right click on the newly created file and select "Show in Finder" (Mac) or "Show in windows explorer" (windows):

The file will then be displayed on your screen.  Once you know the location on your computer, it's just a matter of moving it to the right folder so that you can upload it to your account.

This procedure actually assumes that the music file is already loaded into itunes. If the clip is not already loaded into your library, you will have to select (file > open), and navigate to the file on your own computer, to make it active in your library, so that you can select it before going to the (advanced > create mp3 version) option.

These instructions are for converting an mp3 file that is on your computer and in your itunes library. Apple has just very strangely labeled this feature to make it seem like it is only for the conversion of cd audio, whereas it actually can be used for any audio conversion.