On Sun, May 5, 2013 at 9:53 AM, S.Brandt <s.bra...@mixxx.org> wrote:
> Awesome news,
> had some difficulties loading tracks to deck when using with an existing
> database, but it works when starting with a fresh db.
>
Did you try Max's library_features branch with this library? If so, that
branch introduced a v18 of the DB schema. This key branch also uses v18 for
its data so if you tried Max's branch at any point then your DB won't apply
the features_key changes.
You can just open up your DB with sqlite3 and type this on the console:
$ sqlite3 ~/Library/Application\ Support/Mixxx/mixxxdb.sqlite
ALTER TABLE Library ADD COLUMN keys BLOB;
ALTER TABLE Library ADD COLUMN keys_version TEXT;
ALTER TABLE Library ADD COLUMN keys_sub_version TEXT;
>
> Just some questions to understand the implementation better:
> * How accurate/performing is QM <> libkeyfinder?
> * What if a user wants to use the traditional notation?
> Can we add that to the preferences as well without having to duplicate
> it in the Custom notation pane?
> * Do we know if using the "Lancelot" notation preset is ok?
> * What if there are already keys present in the tracks metadata?
> * Is there code in place to write notations to file?
> If so, where we are going to write the notations (.e.g INITIALKEY,
> GROUPING, ...)
>
> Possible bugs:
> * The new pitch control does change the playback rate of the track too,
> while it is supposed not to.
>
> jus
>
> On Sunday, May 5, 2013 at 7:15 AM, RJ Ryan wrote:
>
> Hi all,
>
> I've taken Varun's GSoC work from last summer and done some surgery on it.
> The result is looking promising and is just about ready to merge to trunk.
>
> https://code.launchpad.net/~mixxxdevelopers/mixxx/features_key
>
> I'm ready to reach out and get your feedback! Experimental builds are here:
> Ubuntu and Mac:
> http://builds.mixxx.org/builds/experimental-features_key/r3062/
> Windows will show up here (there was a problem w/ r3062)
> http://builds.mixxx.org/builds/experimental-features_key/r3064/
>
> This introduces a new database revision, #18. Please make a backup of your
> database first. Since this is ready to merge to trunk I will probably
> cherry-pick this revision into trunk so we don't have to worry about
> someone else creating a revision 18. But just to be safe, I would backup
> your library.
>
> New features:
>
> * Automatic key detection on your tracks using the Queen Mary key detector
> VAMP plugin. (The plugin is selectable just like for the beat detector so
> we can add KeyFinder support trivially. The QM key detector was already in
> our current plugin set so it made sense to turn that on first.).
>
> * Full list of key changes is stored and a global key is calculated by the
> most dominant key (the key the track was in for the longest amount of
> time). We can play with other methods of calculating the global key later.
> The full list of key changes is stored in the database just like the full
> list of beats is for beat detection.
>
> * New "pitch" control that allows you to change the pitch of a song
> independent of its tempo/rate. This is measured in octaves of change. A
> value of 1 means a full octave pitch shifted up while a value of -1 means a
> full octave pitch shifted down.
>
> * A <Key> widget in the skin that shows you the current effective key of a
> deck. For example, if a track's key is C and it is pitch-shifted up by one
> 1/12 of an octave then the key widget shows C#.
>
> * Key preferences pane has support for key notations. You can choose which
> key notation you would like Mixxx to use for your tracks. The built-in
> notations are OpenKey and Lancelot notation (A notation that I came up with
> based on the Circle of Fifths). If you select a custom notation then you
> can provide a custom string for each key.
>
> * Mixxx tracks the symbolic/semantic key internally so changing key
> notation is nothing but a rendering/text display change. So if you change
> your notation, all key display throughout Mixxx will change. Tracks that
> were analyzed when you chose the old notation will update to have the new
> notation. Even tracks that had keys read from their ID3 tag will change.
> (Note, this is just internal to Mixxx -- we still don't touch your file's
> ID3 tags).
>
> * In the library key column, you can enter keys in any notation Mixxx
> supports. For example, you can type C# minor as either "C#m", "c", "12a"
> (lancelot), or "5m" (openkey) and Mixxx will interpret that internally as
> C# minor and immediately re-display the key in your chosen notation.
>
> The Deere 1280x800 skin is the only one with test widgets. There is a
> crossfader above the crossfader that controls deck 1's pitch and there is a
> key display to the left of the BPM display. Please don't file any bugs
> about this skin -- I know it's really crappy :).
>
> Speaking of bugs, please file any other bugs! There are some known issues:
> * SoundTouch kind of freaks out when you pitch-adjust tracks causing a
> performance issue. It's related to the ReadAheadManager read-log. For now
> just assume pitch shifting causes lag..
> * Pitch shifting quality is not great :(. Hopefully we can tweak
> SoundTouch here.
> * When you first start up, the key display says "INVALID". This is just
> for testing. Normally that would be the empty string.
>
> And currently on the TODO list:
> * A delegate for the key column that gives you a combo-box dropdown of
> keys in your notation.
> * The key column delegate should show the key in a red background if it is
> not understood by Mixxx (for example, if the key is read from an ID3 tag
> and Mixxx can't understand it).
> * libkeyfinder in the Mixxx VAMP plugin set
> * Key-based sync which will sync a track's pitch to match the target
> deck's key.
>
> Fun stuff!
> RJ
>
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