I have a turntable to use Audacity to make3 MP3 files. I recorded a few albums that way, but I seem to have done something wrong. I didn’t get MP3 files. Instead, I have a bunch of Audacity data files d00/e0…. That’s not what I want. Is there a way to make an MP3 file from these data files? It’s been too long to remember how I did this, as in, I don’t know if i made a project. I can’t seem to find a way to turn the e00.. files into music. Can I save my efforts, or do ai nee3d to start all over again? Thanks.
Ken
If you can find the .aup project file, click on it and it will open all the little .au files in the similarly-named .data folder. Once the show opens, File > Export to the audio format of your choice. If your Audacity is too old, it may not want to create an MP3 file. There were copyright issues there for a while.
Koz
Hmmm… I don’t know… I wonder if that’s a temporary format.
If you saved the project everything should be saved in an AUP3 file (if you are using the current version). Some other temporary files are created but they aren’t normally “d00/e0…” files.
With the current version you can save an AUP3 project file and/or export as WAV or MP3 or other standard audio format.
I always recommend exporting to WAV (1) immediately after recording whether you save a project or not because the project is more complex and somewhat more “fragile”. (I rarely make a project file but it depends on the kind of things you’re doing.)
The old AUP format was an AUP data file, plus many AU files containing small fragments of audio. Everything had to be kept-together in the same folder or it would become unusable.
(1) As you may know, MP3 is lossy compression. Data is thrown-away to make a smaller file. If you open the MP3 in Audacity (or other “regular” audio editor it gets decompressed. If you re-export as MP3 you are going through another generation of lossy compression and some “damage” accumulates. Ideally, you should compress ONCE as the last step.
FLAC is lossless compression so it also makes a good temporary format, or a good permanent archival format as an alternative to WAV.
The little .au files should play about six seconds of the show. They alternate Left and Right in a stereo show.
The aup file is the Audacity instructions how to put it all back together again. The .au filenames are not in order except time and date. If you didn’t edit anything, it should be possible to reassemble the show with just the .au files. It could take years.
Koz
Or, you might have to start-over and re-record. Not terrible as long as you still have the records. Try one song until you get it figured-out. 
Thanks, everyone. I found the .aup file after all. The content I have listened to so far sounds too “high” vocally. Is there some setting to capture all the voices properly and not only the high voices? Thanks.
Ken
Make sure Windows “Enhancements” are turned OFF.
It causes all kinds of weird problems and it seems to be getting “very good” at filtering-out everything but spoken voice, and they have other “features” & settings that alter the sound in different ways.
…Sometimes another application or a Windows update will enable the “enhancements” but Audacity doesn’t touch the Windows settings.
If that’s the problem it happens during recording so you will have to start-over.
BTW - Make sure both Windows and Audacity are set for 2-channel stereo.