Two sampling frequencies used in digital audio are 48000Hz and 44100Hz. While the human ear can barely detect the difference between the two, computers and other devices are a little bit more discerning. Some programs and players will read only MP3s encoded with a 44100Hz sampling rate, which is a problem if your MP3s are encoded at the higher 48000Hz rate. Thankfully, there are many different audio conversion programs that can take a file encoded at the higher frequency and create a new copy at the lower frequency.
Using Format Factory
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Step 1
Download and install Format Factory (see Resources). Launch the program after installation is complete.
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Step 2
Click on "All to MP3," and drag the MP3 file you want to convert into the program window.
Step 3
Go to "Output Setting." Click on the small arrow next to "Sample Rate (HZ)," and choose "44100" from the drop-down menu. Click "OK" to save the changes.
Step 4
Click "Start" to convert the 48000 Hz file to a 44100 Hz file. After the conversion process is complete, click on "Output Folder" to open the folder where the file was saved.
Using Free MP3 WMA Converter
Step 1
Download and install the Free MP3 WMA Converter (see Resources). Launch the program after installation is complete.
Step 2
Drag the file you want to convert into the "Files to Convert" section of the program window.
Step 3
Click on the drop-down menu next to "Output Format," and select "MP3."
Step 4
Click on the button next to "Format Parameters," and click on the "General" tab. Under "Sample Frequency," select "44100 Hz" and then click "OK."
Step 5
Click "Convert!" and the file will be converted to 44100 Hz.
Using Super
Step 1
Download and install Super (see Resources). Launch the program after installation is complete.
Step 2
Right-click anywhere in the program window, and select "Add Multimedia Files" from the menu that appears. Choose the file you want to convert, and click "OK."
Step 3
Click on the drop-down menu under "Select the Output Container," and choose "MP3 (Audio Only)."
Step 4
Go to the "Audio" section. Under "Sampling Freq," choose "44100."
Step 5
Right-click on the program window again, and select "Output File Saving Management." Choose the folder in which you want to save the new file, and then select "SAVE Changes."
Step 6
Click "Encode (Active Files)" to convert the file to the new sampling frequency.