Bug: Compression graphs inconsistent

[vectorwarrior]

The compression graphs in multiband dynamics and others are inconsistent for me. As you can see from the attached image, I'm seeing a max of around -7dB on the time graph but the bar graphs show a max of -13.2dB. This was from looping a very short piece of audio over, you can see four loops of it in the time graph.

I've seen this inconsistency in pretty much all the Melda compression graphs... it's not normally a massive problem as I mix by ear anyway, but the meters are pointless if they're not accurate and that's quite the inconsistency. I also dont know which one is the 'accurate' one.

Thanks!

[AudioTraveler]

Make sure your looping points are at Zero Crossing , and look if you are getting different results..

[jmg8]

Maybe the GR in the time graph is an average like RMS or something?

[DarkStar]

Maybe I'm wrong but ...

The horizontal meter scale is for -40 dB to 0 dB. The right-hand scale on the graph is the same, looking at the graph and using that scale the max gain reduction is about -12 to -13 dB. OR have a misinterpreted it?

PS: You can change the axes' scales in the Time Graph Settings pop-up window

[vectorwarrior]

Thanks darkstar, you're right. It's a scale issue, I was looking at the scale on the left in the time graph, when it should be the one on the right. I don't quite 'get' how the user is supposed to know which is the correct scale for a given graph, but at least that resolves my issue, thanks!

[vectorwarrior]

Although, this does raise the question of why is the gain reduction time graph measured linearly and not logarithmicly like the signal transfer curve. If they were both logarithmic then not only would the scale be consistent, we could lose the scale on the right completely and melda would get less complaints that the gain reduction meter is hard to read (it's come up on this forum a few times).

[DarkStar]

Me neither - I had to look twice. I changed the vertical scales but did not notice any change in the waveforms or gain reduction line, so I'm slightly bemused about how to read the values

[MeldaProduction]

Exactly! Just look at the right vertical axis .

[DarkStar]

OK that's worth adding to the help window.

If I change the scales on the timegraph I thought that the the curves and waveform sizes would change. But they do not; what am I missing?

[MeldaProduction]

Nope, it wouldn't make sense, because in many case the units of different graphs are incompatible. You can use the unit setup to select units you'd like for your graphs if you know something is better, I'd personally don't use it .

[DarkStar]

I can understand that the scale are not compatible. What I do not get is why the actual graph curves do not change if I change the scale from, for example, -40dB to -80dB. How do I use the scale values to interpret the curves?

---------------
FR: When I change the Time Graph Settings they apply only to the currently-selected band; it would be handy if we had a button to apply the changes to the graphs for all bands (on the other plug-ins too).

[MeldaProduction]

Well, consider it just as a "guide", you can change the axis, but you cannot change the graphs themselves.
I quite don't follow the FR ??

[DarkStar]

^^^
If I have, say, 4 bands and wish to see the same graphs and colours for all 4 bands then I have to make the changes on this window

for each band. It would be handy to make the changes only once and them be applied to the timegraph for each band.

[MeldaProduction]

Well, for starters, tell me which plugin

[DarkStar]

That was from MMultibandDynamics; I've not checked all the others.

But .. take a well-deserved break for a week or two.