» Audio Analysis
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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

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Shoutbox

~6h ago

u7angel: @xxxlalala i meant matcap, look for that

~8h ago

xxxlalala: thanks @u7angel superphong is exactly what i was looking for. litsphere gave me no search results though :(

~10h ago

u7angel: i guess most pro vvvv users don't use emeshe for various reasons but more custom collection of shaders. see superphong or litsphere

~12h ago

xxxlalala: is emeshe the way to go for rendering with materials ? (asking because it says deprecated)

~3d ago

catweasel: Lovely, that did it! Just needed right click which wasn't coming through :)

~3d ago

catweasel: is the tablet plugin missing from recent builds? seems like all 35v(64bit, or is that the problem?)

~3d ago

joreg: ...aaaand here's the full workshop schedule for #NODE17 node17-workshop-schedule #vvvv

~5d ago

joreg: here we go: complete list of 49 workshops for #NODE17 node17-workshops-announced schedule still to come #vvvv

~5d ago

velcrome: @superflysiNZ it is pretty cool, and works solid. but you need #m4l