Basic Recording, Editing and Exporting

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Contents

  1. Recording
  2. Removing any DC offset (if present)
  3. Editing, Noise Reduction and Click Removal
  4. Adjusting amplitude
  5. Exporting
  6. Backup

Step 1: Recording

Create a new Project by clicking File > Save Project As....

Adjust the input signal level as explained in the previous tutorial under Monitoring. Remember that it is good to aim for a maximum peak of around –6.0 dB (or 0.5 if you have your meters set to linear rather than dB).

Start your recording by pressing the red Record button The Record button from the Transport Toolbar, then starting the player. You can pause and restart the recording between tracks or sides with the blue Pause button The Pause button, which keeps your recording on one track within Audacity. This is the easiest way to record into Audacity, because having just one track on screen allows you to split the recording up into the different songs or sections using "labels". See the tutorial: Splitting a recording into separate tracks for more on this.

An alternative to using the Pause button is to Stop the recording, with the yellow Stop button The Stop button, at the end of the first side, then use Transport > Append Record (or shift-click on the Record button The Record button or its keyboard shortcut SHIFT + R) to continue recording on the existing track.

If you do want to start new tracks for different sides of the tape or LP on a new track in Audacity, then press the yellow Stop button The Stop button to stop recording, get the LP or tape to where you want to go to, then press the red Record button The Record button in Audacity and start the player. The recording will now restart on a new track.

Warning icon If you have just made a recording it is strongly recommended to File > Export... it immediately to WAV or AIFF (ideally to an external drive) as a safety copy before you start editing the project.

Step 2: Removing any DC offset (if present)

DC offset can occur at the recording stage so that the recorded waveform is not centered on the horizontal line at 0.0 amplitude. This can be caused by a faulty soundcard. If this is the case with your recordings, see the Normalize page for how to use Normalize to remove DC offset and how to check if your Windows sound device can perform this correction automatically.

Step 3: Editing, Noise Reduction and Click Removal

When you have finished recording, press the yellow Stop button The Stop button and save your recording into the Project you started by using File > Save Project. Now the data is safe, you can edit it in Audacity if you want to (for example, cut redundant pieces out), or come back to it later by re-opening the saved Project file with the File > Open command. See Edit Menu for help with editing.

You may also want to remove clicks from records using Click Removal, then after that you can optionally use Noise Reduction to try to reduce steady noise such as vinyl "roar" or analog master tape hiss. Noise Reduction is especially useful for reducing hiss when recording cassettes.

Removing clicks and pops is recommended when recording vinyl, as any loud click will interfere with maximizing the volume of the recording - the Amplify effect cannot tell the difference between music and clicks. Select the entire track by clicking on the Track Control Panel or choosing Edit > Select > All then choose Effect > Click Removal. The default parameters in the Click Removal dialog will detect and remove most clicks, so try this first. If you find that it did not remove certain clicks or pops, select those regions in turn and apply the Click Removal effect, adjusting the parameters until it is successful. See this page for more details on using the Click Removal effect. See Click and pop removal techniques for further help with click removal.

Linux users may be interested in trying Gnome Wave Cleaner which is free and open source.

Mac and Windows users may be interested in trying Brian Davies' Click Repair software. It is not free and requires Java, but has a 21-day free trial period so you can try it out and see if it is worth it to you. There are other non-free alternatives, such the Pop/Click and Smoother tools in Goldwave.

Noise Reduction is tricky to get right. You need to be prepared to experiment with the effect so that it discards as much noise as possible without damaging the sound you want to keep. It is more effective at removing cassette hiss than "vinyl roar".

Step 4: Adjusting amplitude

As a final step, since you were careful not to record too loud it is likely that your recording is not as loud as possible. To correct this you can use the Normalize effect.

  • Choose Edit > Select > All to select all the track.
    • With default Tracks Preferences, you may not need this step - all the audio in the project is selected if you choose an effect without first selecting any audio.
  • Choose Effect > Normalize....
    • Accept (for now) the default choices in the Normalize dialog and click the OK button
    • The volume is normalized to -1 dB, so leaving a little headroom below the maximum possible 0 dB level.

Note that Normalize defaults to retaining the existing balance between stereo channels. However basic consumer-level equipment can often record with channels unbalanced. To correct unwanted volume differences between left and right, uncheck "Normalize stereo channels independently".

Extraneous noises in the recording can cause Normalize to create unwanted changes in the stereo balance, or prevent recordings being made as loud as they can be. Extraneous noises should be edited with Click Removal, Repair or Amplify before the Normalize step. Also see our tips for reducing noise in the recording chain.

Step 5: Exporting

When you are happy with your editing, you need to export the recording as an audio file such as WAV or MP3 that you can either play on your computer media player (for example on iTunes or Windows Media Player), or which you can burn to an audio or MP3 CD. See the About WAV, AIFF, MP3, Audio CDs and MP3 CDs below about the difference between audio and MP3 CDs. To export a single audio file, use the File > Export... command. If your recording contains multiple tracks or songs, you may want to export these from your Project as separate audio files. This would be necessary if you wanted to burn a CD with separate CD tracks corresponding to each track in your recording. To prepare your recording for export as separate audio files, see the tutorial Splitting a recording into separate tracks.

If you are planning to burn a CD with your exported files you should ensure that you use the export format 16-bit PCM stereo WAV, this should be the default if you have not changed it. Also ensure that your Project Rate is 44100 Hz (see the box in the bottom left hand corner of the Audacity window).

About WAV, AIFF, MP3, Audio CDs and MP3 CDs

WAV, AIFF and MP3 are the most common formats for exporting. WAV and AIFF files are of identical quality to the original recording, but take up 10 MB or more of disk space per minute. If you want to burn an "audio CD" that will play on any standalone CD player (note these only give you 74 - 80 minutes' playing time), export your recording as a 44100 Hz, 16-bit stereo WAV or AIFF file. See: Burning music files to a CD.

If you want your exported audio file to be smaller (you'd want to do this for example if you wanted to make it available on the internet), you can export as MP3, at the expense of losing some of the audio quality of the original. You can also burn the MP3s to a "data CD" or "MP3 CD" which will give you (at Audacity's default MP3 export settings) over 11 hours' playing time on the CD. Note you can only play these kind of CDs in computers, MP3 CD players (including some newer automotive players), or some DVD players. Generally, you will see an MP3 logo printed somewhere on the device if it is MP3-capable. Note that most players manufactured prior to 2005 will not be able to play MP3 CDs. To export as an MP3, you first need to add the LAME encoder to your system and show Audacity where it is.

If you are exporting your file to a media application which has its own "Library" such as Windows Media Player, iTunes or Real Player, you would generally drag your exported file into the application's Library, or use the media application's built-in commands to add the exported file to its Library. For more help on importing your audio file into iTunes (for example burning to CD or for putting on an iPod), see Exporting to iTunes.

Step 6: Backup

Backup your exported WAV or MP3 files - you do not want to lose all that valuable work and have to do it all over again, do you? Computer hard drives can fail, destroying all data.

Ideally use a dedicated drive (1+ TB external drives are convenient and economical), or upload to an online (cloud) storage service, to store the WAVs or MP3s. Better still is to make two copies on different external devices and even better is to hold an off-site backup.

You may want to create a taxonomic file structure - for example each album can be stored in its own folder (named for the album) within a folder named for the artist (or, perhaps, composer for classical music) to make searching and retrieval easier.

Links

>  Forward to: Splitting a recording into separate tracks

<  Back to: How to set up Audacity

|< Tutorial - Copying tapes, LPs or MiniDiscs to CD

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