Step 1: Get the best audio CD converter on your computer. Download and install Screen Recorder on your Windows PC, which is available to Windows 10/8/8.1/7/XP. There is another version for Mac OS. When you discover your favorite songs, launch the application from your desktop and click the Audio Recorder to open the MP3 to CD converter window. Step 5. Click Done and select an output folder, then Click the Run button to compress audio file. Here is a list of compressed file size and corresponding bit rate. In the test, the original file is 44.1kHz, 320kb/s MP3 and the original size is 6MB. As you can see, with lower bit rate, the file size shrinks. Select all audio files that you want to convert in library panel, then move to the bottom area, click and expand the "Profile" dropdown menu and select "MP3". If you want to listen to the music on your mobile device, select the target device. Next, hit the Browse button and drop a proper location to save the results. ywqev.