album gain normalization

[Be]

Currently Mixxx only calculates gain normalization on a per track basis to normalize the perceived loudness to a specified target loudness. This can reduce intentional differences between dynamics among tracks in an album. It would be nice if Mixxx could also normalize the perceived loudness between albums while preserving the dynamic range within albums. A setting to toggle between track and album normalization may be added to the AutoDJ preferences or perhaps a button in the AutoDJ controls in the main window.

[Daniel Schürmann (daschuer)]

Please explain your use case.

This means that a track recorded with low volume will still played at low volume.
If there is a loud track in the album the low track will be played even lower.

[Be (be.ing)]

The use case is playing whole albums with AutoDJ and preserving the relative levels of tracks within each album.

[Daniel Schürmann (daschuer)]

Thinking of it again, the album replay gain is probably the one that is the "intended" loudness of a track.
For example, it does not make sense to play a noise floor intro at track replay gain. That would be much to loud.

How to you like to obtain the album gain?
I bet, there are only a minority of tracks, with this set?

I think an option: "Use Album gain if available" makes most sense.

An option to calculate album gain could be also usefull.

[Be (be.ing)]

I would like if Mixxx could calculate this along with the track gain. The analyzer could be toggled by a preference option so users who would not use album gain would not need to spend the CPU time analyzing it. I am not sure how to implement this because Mixxx analyzes one track at a time.

[Daniel Schürmann (daschuer)]

For album gain, the we hole album needs to be analyzed together, somehow as a single track.
For this to work, we need to fetch all tracks from an album in one analysis.
It will get a bad result of a single track is missing or the album tracks are ripped from different recordings.

[Be (be.ing)]

Perhaps we could cache a running average per album in the database? I'm not sure how album gain normalization is typically calculated, so that might not be feasible.

[Daniel Schürmann (daschuer)]

Mixxx has already global accessible control objects for it: [Recording], "status" with RECORD_OFF (0.0) RECORD_READY (1.0) RECORD_ON (2.0) and RECORD_SPLIT_CONTINUE (3.0) and [Recording], "toggle_recording".
These controls might be used from a PlugIn, to enforce the streaming user conditions. If [Recording], "status" is different from 0.0 the Plug-In may stop either the stream or the recording via [Recording], "toggle_recording"

[Daniel Schürmann (daschuer)]

Ups, #7 went to the wrong bug.

[Swiftb0y (swiftb0y)]

Mixxx now uses GitHub for bug tracking. This bug has been migrated to:
https://github.com/mixxxdj/mixxx/issues/9162