How to Recover Audacity Files
Audacity is a free audio editing tool that supports multi-track recording. During the recording process, the program creates small .au audio files and stores them in a temporary folder. If Audacity ever crashes while you are working on a recording, you may be able to recover your project by importing the temporary .au data files and combine them into a single .wav file. You can then use the .wav file to continue working on your Audacity audio project.
Things You'll Need
Open Audacity and press "CTRL+P" to open the Preferences window.
Click the "Directories" tab. Audacity will display a text box showing the location of the folder that it uses to store temporary files. Use the mouse to copy the text from the text box. Click "Close" to close the Preferences window.
Press "CTRL+I" to open the Import window.
Right-click the text box named "File Name" and select "Paste." This will paste the string that you copied into the text box.
Click "Open." This will display the temporary .au files in the folder.
Select all .au files in the folder and click "Open" to open them in Audacity. The Import window will close and return you to the main screen. You will see the .au files in separate audio tracks arranged vertically down the screen.
Click anywhere in the second audio track and press "CTRL+A" to select the contents of the track. Press "CTRL+X" to cut the track.
Click the end of the first track and press "CTRL+V" to paste the contents of the track that you cut. Audacity will append the audio data to the end of the first track.
Repeat this process using the third track. Cut its contents and paste them at the end of the first track. Repeat this process with the remaining tracks until you have pasted them all into track number one.
Hold down the "Shift" key and select every track except the first one.
Press "Project" and select "Remove Tracks" to delete those tracks. Track one, containing all of the audio data, will remain. Click "File" and then "Save" to save the project.