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Topic: DDj-1000 hid/midi script bug deck level
Hi,

For DDJ-1000, on the led deck vu meter : one led is 3 dB/3 dB per led

so in the factory default script there is a bug :
<map value="VU_METER" action="get_level" />
(1dB per led)

And should be :
<map value="VU_METER" action="get_level & param_pow 0.5" />
-> one led : 3 dB, ok

Please fix this in default DDJ-1000 factory default, and with this parameter, DDJ-1000 deck_meter works better in VDJ than Rekordbox 5.x/5.5, because Rekordbox 5.x/5.5 have a +6dB bug (It display +6dB more on deck level meter on DDJ1000, than Rekordbox internal display and the real Headroom/audio...)

Regards,

Olivier F.


Posted Sun 21 Apr 19 @ 2:58 pm
Deck "vu's" scale is 3db per led ?
How did you come to that conclusion ?
Master VU of DDJ-1000 has a scale on it's silkscreen. But that's an analog audio VU meter.
Deck "vu" meters don't have a scale printed. That's because they are MIDI controlled and can display literally anything.
VirtualDJ does not use 1db/led either. VirtualDJ "VU" scale is dbfs. Therefore "get_level" returns a value that can be converted to dbfs.
dbfs=20*log(x)
dbfs is the ONLY proper way to measure volumes in the digital domain. There's no proper way to convert it to "analog vu". There are ways to convert it for a given device (based on the device specifics) but it's only a rough estimation.
Therefore it's easier (and more accurate) to compare dbfs between the various channels directly, than a rough conversion.

Finally:
VirtualDJ does show the headroom on VU's. If you lower the "zerodb" setting, vu's will adjust accordingly (and IMHO that's the right thing to do on VU's)

Posted Sun 21 Apr 19 @ 8:39 pm
Dear Phantom,

You answered to quickly.

i've never say that : "VirtualDJ doesn't not show the headroom on VU's, or are wrong in dBfs....."

And i don't speak about Master level VU-METER, but deck(1/2/3/4) level meter of DDJ1000.

I don't think in analogue mode.... you take me for a stupid man :

With VDJ GET-LEVEL only, level meterod DDJ1000 don't behave like Rekordbox:

at -9 dBfs :
0 green led on / the 8 others off

at -8/-7/-6 dBfs :
1 green led on / the 8 others off

et - 5dBfs :
2 green led on / the 7 others off




Posted Sun 21 Apr 19 @ 9:02 pm
Dear Phantom,

You answered to quickly.

i've never say that : "VirtualDJ doesn't not show the headroom on VU's, or are wrong in dBfs....."

And i don't speak about Master level VU-METER, but deck(1/2/3/4) level meter of DDJ1000.

I don't think in analogue mode.... you take me for a stupid man :

With VDJ GET-LEVEL only, level meter of DDJ1000 don't behave like Rekordbox:

at -9 dBfs :
0 green led on / the 9 others off

at -8/-7/-6 dBfs :
1 green led on / the 8 others off

at - 5dBfs :
2 green led on / the 7 others off

at - 4dBfs :
4 green led on / the 5 others off

at - 3dBfs :
4 green led on/ 1 yellow on / the 4 others off

at - 2dBfs :
4 green led on/ 3 yellow on / the 2 others off

at -1dBfs :
4 green led on/ 3 yellow on / 1red on / the 1 others off

at 0dBfs :
4 green led on/ 3 yellow on / 2red on

So VDJ dBFS ok, but display scaling completly different than Rekordbox with DDJ1000....

Just what i said....

And with this soluce :

get_level & param_pow 0.5
-> The display deck level meter on DDJ1000, behave like Rekordbox without the +6dBfs Rekordbox bug, soon fixed.

Thanks



Posted Sun 21 Apr 19 @ 10:08 pm
yaqopPRO InfinityMember since 2005
+1

Posted Tue 23 Apr 19 @ 9:25 pm