PeteVanPolaris
Hi all. I have a question about the XML properties for the database-Scan tag. I see the BPMs are notated as floating point values - what magic formula do one need to convert this value to a presentable form? I attempted to find a relationship between actual BPM / XML-Bpm but get different readout for the factor each time, assuming there is a base value subtracted beforehand? Before I chip of thick rust from my mad middle-school math skills, there may be some who knows the answer already?
Example lines:
<Scan Version="800" Bpm="0.468764" AltBpm="0.703152" Volume="1.678932" Key="C#m" Flag="32768" />
-> translates to 128 BPM
<Scan Version="801" Bpm="0.447766" AltBpm="0.335828" Volume="1.182598" Key="G" Flag="32768" />
-> translates to 134 BPM
<Scan Version="801" Bpm="0.434785" AltBpm="0.326088" Volume="1.256876" Key="B" Flag="32768" />
-> translates to 138 BPM
Also, what is the difference between Bpm and AltBpm? (it seem to be a 1.5x factor between them). And is there any documentation for "Flag" (looks like a bit-mask)?
Thanks! B-)
Example lines:
<Scan Version="800" Bpm="0.468764" AltBpm="0.703152" Volume="1.678932" Key="C#m" Flag="32768" />
-> translates to 128 BPM
<Scan Version="801" Bpm="0.447766" AltBpm="0.335828" Volume="1.182598" Key="G" Flag="32768" />
-> translates to 134 BPM
<Scan Version="801" Bpm="0.434785" AltBpm="0.326088" Volume="1.256876" Key="B" Flag="32768" />
-> translates to 138 BPM
Also, what is the difference between Bpm and AltBpm? (it seem to be a 1.5x factor between them). And is there any documentation for "Flag" (looks like a bit-mask)?
Thanks! B-)
Posted Tue 04 Dec 18 @ 8:22 am
PeteVanPolaris
Wait, I think I figured it out (right after posting this, of course.. I just noticed the values decreased when the BPM was increasing. And it's 2:30AM here):
1 / Bpm * 60
So, for example the first line:
1 / 0.468764 * 60 = 127.9961771808415, or 128
The second line:
1 / 0.447766 * 60 = 133.9985617487706, or 134
etc. - seem to hold water?
But what is the AltBpm intended for; and flags?
1 / Bpm * 60
So, for example the first line:
1 / 0.468764 * 60 = 127.9961771808415, or 128
The second line:
1 / 0.447766 * 60 = 133.9985617487706, or 134
etc. - seem to hold water?
But what is the AltBpm intended for; and flags?
Posted Tue 04 Dec 18 @ 8:35 am
PhantomDeejay
Yes, the value stored in database is actually the time (in seconds) between 2 beats
The AltBPM is the second most possible BPM the scan engine found when scanning the track (you can see that BPM on Tag Editor BPM drop down menu)
Flags have to do with the database (if a song is included on search results or not e.t.c.). You should not mess with flags property
The AltBPM is the second most possible BPM the scan engine found when scanning the track (you can see that BPM on Tag Editor BPM drop down menu)
Flags have to do with the database (if a song is included on search results or not e.t.c.). You should not mess with flags property
Posted Tue 04 Dec 18 @ 9:02 am
djcel
For information
https://www.virtualdj.com/wiki/VDJ_database.html
https://www.virtualdj.com/wiki/VDJ_database.html
Posted Tue 04 Dec 18 @ 1:35 pm
PeteVanPolaris
Alright, thanks @PhantomDeejay, and @djcel for updating that page with this information as well.
Posted Tue 04 Dec 18 @ 6:42 pm