» Audio Analysis
This site relies heavily on Javascript. You should enable it if you want the full experience. Learn more.

Audio Analysis

Italian

RMS

Related nodes

RMS (DShow9)
RMS (Bass)

There are RMS (DShow9) and RMS (Bass) simple envelope followers. They return the current volume for the left and the right channel.

Note

With all directshow pins (of type audio / midi / video) you can connect each output to only one input pin. Therefore it is not possible with the DShow9 system to play a file and analyse it at the same time. The BASS system doesn't have this restriction.

Examples in your vvvv\girlpower\ directory:

  • Audio

FFT

Related nodes

FFT (DShow9)
FFT (BASS)
FFT (Bass NRT)
FFT (DShow9 4Channels)

There are several nodes performing a Fast Fourier transform:

An FFT returns a spread of amplitudes of a linearly distributed scale of frequencies. But based on experiments on human hearing perception it is known that the scale of frequencies is approximately logarithmic at the high-frequency end, and nearly linear at the low-frequency end.

That means that human meatbags can very good distinguish between low frequencies but the high frequencies sounds almost all the same. Music producers of course make use of that fact, see Psychoacoustics.

That’s not all. Amplitudes should be scaled in a way, that higher frequencies have a bigger scaling factor. Despite the fact that low frequencies carry high energies (resulting in big values coming from FFT), humans perceive low frequencies dull. That is why mid and high frequencies have to be scaled up (nonlinearly).

The FFT Nodes have the Frequency Scaling exactly for that.

For more info on perception check: Equal-loudness contour.

Examples in your vvvv\girlpower\ directory:

  • Audio

Beat trackers

Related nodes

BeatDetector (Value)
BeatDetector (BASS)
BeatScanner (Bass)

There are some useful modules to track beats:

Examples in your vvvv\girlpower\ directory:

  • Audio

anonymous user login

Shoutbox

~7h ago

tonfilm: to whom it may concern: 64-bit #vvvv #alpha builds are up an running again: downloads/alphas

~1d ago

StiX: @synth you sauin something about 420? if mangosh gets confirmed i am coming with him as we are in one ... package

~2d ago

synth: @evvvvil here only to do lasers, they don't let me near the screens after last time ...

~2d ago

evvvvil: hahaha yes, please sir, can I have some more sir? Hopefully me and you be battling for visual space soon, GTFOH with your lasers.

~2d ago

synth: BTW - Got 4 20w Kvant lasers here thinking of testing the ILDA nodes live :)

~2d ago

synth: @evvvvil Hell yeah! Couldn't get Vux drunk but your going to get it :D

~2d ago

evvvvil: @synth: hopefully I should be going to GEM FEST soon, not confirmed yet, but if so, beer is on you why not ;) (and me ok)

~2d ago

synth: BTW any vvvv guy coming to Georgia for GEM Festival shout out I am here for the entire thing alone. Some beer on me ;)