Do I need to download LAME separately to export MP3 in Audacity?

No. MP3 export has been built into Audacity since version 2.3.2, so you do not need a separate LAME download. You only need the FFmpeg library to import WMA files.

Can I convert DRM protected WMA files using the FFmpeg library?

No. DRM protected WMA files cannot be imported by Audacity, even with the FFmpeg library installed. The library does not bypass digital rights management.

What bitrate should I choose when exporting to MP3?

The bitrate you choose depends on your needs. 128 kbps matches most old rips and is a good balance of file size and quality. Higher bitrates like 192 or 320 kbps preserve more detail but create larger files.

Can I use Audacity's Macros to convert files in subfolders?

The Apply to Files option in Macros does not automatically include files in subfolders. You will need to add files from each folder manually, or gather all WMA files into one folder before running the macro.

How to Convert WMA to MP3 in Audacity (FFmpeg Setup Included)

Open a WMA file in Audacity and you will get an error. The program cannot read that format on its own. The fix is a single download: the FFmpeg codec pack. Set it up once and Audacity imports WMA, exports MP3, and even batch-converts whole collections while you step away. No paid software, no online uploads.

Why Audacity Cannot Open WMA Files by Default

Audacity is free, open source software for Windows, macOS and Linux. It handles WAV, MP3, Ogg and FLAC straight out of the box. WMA is the gap. The program leans on the optional FFmpeg codec collection to decode those files. Without it, you see the import error. FFmpeg is a free, open source bundle of audio and video decoders. Install it and the gap closes.

How to Install the FFmpeg Library in Audacity

Download the FFmpeg package for your operating system first. Then point Audacity at it.

Open Audacity.
Go to Edit > Preferences > Libraries (on macOS in newer versions: Audacity > Settings > Libraries).
Find the FFmpeg Import/Export Library section.
Click Locate and navigate to the folder holding the library file.
Select the file. The name and extension depend on your OS; on Windows it is often ffmpeg.dll.
Click OK. Audacity confirms the library is loaded.

Once configured, Audacity imports WMA. You can also export to other formats the codec pack supports. MP3 export needs no separate LAME download: it has been built into Audacity since version 2.3.2.

Importing a WMA File Into Audacity

With the codec pack in place, importing a WMA file works like any other format. Go to File > Open or File > Import > Audio and select your file. Audacity decodes the WMA on import, converting the audio into its internal format. This is a lossy decode from the original compression. The waveform appears in the project window. Edit as needed.

DRM-protected WMA files will not import. The codec pack does not bypass digital rights management. Those files fail to open regardless.

Exporting the Audio as MP3

Choosing Your Export Settings

Once your audio is imported and edited, export it. Go to File > Export > Export as MP3. A dialog lets you pick a bitrate. The options in Audacity match common standards: 96, 128, 160, 192, 256 and 320 kbps. For old WMA rips, 128 kbps matches the source quality. Choose the setting you need, name the file, and save.

What Happens to the Audio

Audacity decodes the WMA on import, so exporting to MP3 is a fresh lossy encode from decoded audio. Each encode degrades quality. Export at a bitrate that preserves the sound you want. Do not re-encode the same file repeatedly.

Batch Converting Multiple WMA Files with Macros

Converting files one by one is slow. Audacity includes a batch processor called Macros. A Macro records steps (import, export, effects) and applies them to many files at once. Here is the setup for WMA to MP3.

Creating the Macro

Go to Tools > Macros.
Click New and name it, for example "WMA to MP3".
In the left panel, select Export as MP3 from the command list and click Insert.
You can add Normalize or Trim Silence if needed. The export step alone is enough for conversion.
Click OK to save.

Applying the Macro to Multiple Files

In the Macros window, select your new macro.
Click Apply to Files.
In the dialog, click Add Files and select every WMA file you want converted.
Choose a destination folder for the MP3 output.
Click Apply. Audacity processes each file in sequence: importing the WMA, exporting it as MP3, and saving it to the output folder.

The batch macro saves hours when you need to convert a whole collection. Reuse it anytime you add new WMA files.

Troubleshooting Common Issues

FFmpeg library not found: Double-check you selected the correct file in Preferences > Libraries. If the file is missing or corrupted, download a fresh copy.
WMA file still will not import: Confirm the file is not DRM-protected. Check it is not damaged by importing a different WMA file as a test.
Macro does not scan subfolders: The Apply to Files dialog skips subfolders. Add files from each folder manually, or move all WMA files into one folder first.
MP3 export missing: Make sure you are on Audacity version 2.3.2 or newer. Older releases may lack built-in MP3 export. Update to the latest version.

Alternative an Online Converter

If you prefer not to install anything, a browser-based tool converts WMA to MP3 directly. The service at wmatomp3converterfree.net handles whole collections, needs no account, and imposes no limits. It offers bitrates of 96, 128, 160, 192, 256 and 320 kbps. For offline work, or if Audacity is already on your machine, the FFmpeg method is a reliable free solution that keeps your files local.