Frequency heat graph for mastering tracks

[sleightmind]

Hey all. So I've seen pics around the net where when you send a track for mastering, they run it through something that outputs a frequency graph that looks like a heatmap. So on the X-axis you have time, and on the Y axis you have frequency, and then at each point the color shows amplitude at that frequency I'm guessing. So the result is a heat map that shows how your track is filling out the spectrum at any given time. So if you look at this graph and see any dark spots, you should go back and fill in those frequencies with more sounds, or if it's red in one area, take down those sounds. Does anyone know what this is? And how can I do this to my tracks? Is this a VST, or a post processing software? Thanks guys.

Deviance

[jrisreal]

Spectrograph I think

[Depone]

This ones free and is very quick

http://www.spek-project.org/

[sleightmind]

Awesome awesome awesome! That Spek tool was exactly what I was looking for. Thanks Depone.
Immediately it became clear that my track was missing something. I got almost nothing above 15khz. I gotta go back and add some instruments in the upper frequencies. I'm also coming in way too loud every 8 bars with a crash cymbal and a bass drop, and then it settles down from there. I gotta bring down the crashes and bring up the rest of the track.
Thanks so much guys.

Deviance

[Depone]

On a similar vein, check out my mp3 degradation test using spek

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http://www.dubstepforum.com/viewtopic.php?f=8&t=175491

[VirtualMark]

I got almost nothing above 15khz. I gotta go back and add some instruments in the upper frequencies.

i'm sure all of the bats and dogs will appreciate your efforts.

[bassinine]

I got almost nothing above 15khz. I gotta go back and add some instruments in the upper frequencies.

i'm sure all of the bats and dogs will appreciate your efforts.

lawl.

yeah man, you're probably not going to want to add much content in addition to what's already there above 4k hz. that's where it starts to sound REALLY high-pitched.

[oWLinDaylight]

I got almost nothing above 15khz. I gotta go back and add some instruments in the upper frequencies.

i'm sure all of the bats and dogs will appreciate your efforts.

And don't forget small children.

[Teknicyde]

I got almost nothing above 15khz. I gotta go back and add some instruments in the upper frequencies.

i'm sure all of the bats and dogs will appreciate your efforts.

And don't forget small children.

I finally understand sweet shop now that I read this

[paradigm_x]

what is this obsession with 'filling out the entire spectrum?' ???

Equal energy in all octave bands is white noise



has huge gaps and sounds far better for it. Just as an example.

[laurend]

what is this obsession with 'filling out the entire spectrum?' ???

Equal energy in all octave bands is white noise



has huge gaps and sounds far better for it. Just as an example.

Exactly the opposite here:

http://www.youtube.com/watch?v=GdtZ950vugE&hd=1