How to Use add-ons for better sound and tagging
1 Find the folder
Download the scripts you want from dougscripts.com (there are hundreds to choose from). Put them in /[username]/ Library/iTunes/Scripts. On a Mac running a clean installation of macOS Sierra or later, you’ll have to create the folder.
4 Maintain your library
The ‘Artist - Name Corrector’, ‘List MIAs’, and ‘Super Remove Dead Tracks’ scripts can tame tags, reconnect items whose files have been moved, and find and remove tracks whose files are missing but no longer wanted anyway.
7 Save the update
≈- click on the album or track title and choose Save. This automatically updates the data for the track(s) with the information from the Musicbrainz database. The software works quickly and an album takes just seconds to fix.
2 See your scripts
Open iTunes and click the script icon to the right of the app’s Help menu. You’ll now see the names of any scripts you’ve put in the Scripts folder. Note that if you want to add new ones, you’ll need to quit and reopen iTunes.
5 Use your brainz
Musicbrainz Picard can tame even very big iTunes libraries. It scans your entire library for potential issues; if you select a group of tracks and then press Cluster, it will try to identify and group them in album clusters.
8 Make it boom
Boom3D from Global Delight enables you to create different settings for each of your audio outputs: your Mac’s speakers, an external audio device or different kinds of headphones, say. You can also control it using an iOS app.
3 Start a script
Select the track(s) you want to fix or edit and then run the appropriate item from the Script menu. In this example, we’ve gone for Coverscope, which enables you to get embedded artwork and iTunes cover art in sync.
6 Scan your selection
If you click your clustered tracks and then on Scan, Musicbrainz will compare them with the information it has in its massive database in an effort to match them. As you can see, there’s quite a lot of missing data here.
9 Tweak the sound
Each icon on Boom3D’s interface is a preset, and you can adjust the strength of it with the little rotary slider that surrounds each icon. You can also dig into the settings to adjust features such as the surround sound effect.