Quick tip. New mobile phones nowadays support playing MP3 files and let you use the MP3 files as your ring tone or message tone. Sometimes, we don't want to use the entire part of a MP3 file as our ring tone. In this post I will show you how to create a MP3 file from certain part of a MP3 file. We will use Audacity, a free and open source sound editing software.

1. First of all, we need to download and install Audacity. In this post, I will use the latest Audacity 1.3.7 beta.

2. Next, download and install the LAME MP3 encoder to allow Audacity to export audio file to MP3 format.

3. Run Audacity. If you've installed the LAME MP3 encoder plugin for Audacity, your Audacity should be able to encode to MP3 files. To check if the LAME MP3 encoder is enabled in Audacity, Go to 'Edit' > 'Preferences' (1). Click 'Import/Export' (2). The version of LAME encoder should be showed (3).