Hey Vittorio
As a side comment, note that you can safely pass:
>
> pluginID="qm-keydetector:2"; //pluginID="plugin name:output"
> on line 50
>
Thanks, didn't know this way of handling it.
> and delete (or comment out):
>
> mvamp->SelectOutput(2);
>
> on line 55.
>
but this line ties up with the m_iOutput variable from vampanalyser.cpp
which is used quite a lot in the VampAnalyser::Process().
If you are going through qm-keydetector, note that it outputs
>
> "...The estimated key for each key change, returned as a single-valued
> feature at the point where the key change is detected..." [1]
>
> that is to say that you may have to figure out how to extract the key of
> the track from the data.
>
Yes, I saw this earlier but I am a bit confused, sometimes the song doesn't
change key at all and it still displays a key change.
The qm-keydetector is more suited for this kind of a display :
http://i.imgur.com/fcddu.png (sonic visualiser with the qm-key detector) .
I am wondering whether this is better or a simple text display showing the
current key value ? Any suggestions ..
Thanks!
Varun
On Tue, Mar 27, 2012 at 5:28 AM, Vittorio Colao <l0...@gmx.it> wrote:
> Hey Varun,
>
> glad to see you are working on key detection through vamp.
> I took a brief look at your code (rev. 2794) and I think you already
> figured out why a wrong plugin was selected.
>
> As a side comment, note that you can safely pass:
>
> pluginID="qm-keydetector:2"; //pluginID="plugin name:output"
>
> on line 50
>
> and delete (or comment out):
>
> mvamp->SelectOutput(2);
>
> on line 55.
>
> If you are going through qm-keydetector, note that it outputs
>
> "...The estimated key for each key change, returned as a single-valued
> feature at the point where the key change is detected..." [1]
>
> that is to say that you may have to figure out how to extract the key of
> the track from the data.
>
> Good luck!
> Vittorio
>
>
>
> [1]
> http://www.vamp-plugins.org/plugin-doc/qm-vamp-plugins.html#qm-keydetector
>
> Il giorno 27/mar/2012, alle ore 06:24,
> mixxx-devel-requ...@lists.sourceforge.net ha scritto:
>
>
> Message: 1
> Date: Mon, 26 Mar 2012 17:52:27 +0200
> From: neo01124 wtf <mr.unwell2...@gmail.com>
> Subject: [Mixxx-devel] GSoC 2012: Harmonic mixing idea
> To: mixxx-devel@lists.sourceforge.net
> Message-ID:
> <CA+d+f3i7cd3NjR=xlpbbzrcge+z2onypgzpgo5raxnsd9hx...@mail.gmail.com>
> Content-Type: text/plain; charset="iso-8859-1"
>
>
> Hi everyone,
> I am Varun or neo01124 (on irc). I study sound and music computing in
> Barcelona and saw the idea for key detection for harmonic mixing last week
> and am very interested in it.
> I was a GSoC intern in 2010 with beagleboard.org . More info here :
> http://www.vjewalikar.in/Projects/GSoC.html
>
> I have been getting upto speed with the codebase and have managed to
> integrate key detection using the QM vamp plugin with lots of help on the
> irc channel. I made use of this branch
> https://code.launchpad.net/~mixxxcontributors/mixxx/features_vamp and code
> from its previous revisions.
>
> The bug right now is that the code is unable to load the qm-keydetection:0
> and is just using the qm-tempotracker:0 plugin and thus is displaying tempo
> values instead of key values. Looks something like this :
> http://i.imgur.com/1aGPL.png .
> I have been trying to upload it to Launchpad to seek help but bzr won't
> allow me to commit my changes.Error looks like this:
> http://pastebin.com/yzqFkpWC
> I don't have commit rights on the branch but I just want to make a local
> commit and upload it to launchpad.
> Any help in both regards is appreciated ..
>
> Thanks
> Varun
>
>
>
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