db&w documentation wiki

finest software | finest docs

Site Tools


tools:audiofrequency

Differences

This shows you the differences between two versions of the page.

Link to this comparison view

Both sides previous revisionPrevious revision
Next revision
Previous revision
tools:audiofrequency [2020/05/26 15:07] – [Audio Frequency Channel Modifier] lightwolftools:audiofrequency [2020/09/11 11:42] (current) – [Spectrum (norm)] lightwolf
Line 1: Line 1:
-====== Audio Frequency Node (in progress) ======+====== Audio Frequency Node ======
  
 This node can load audio files (WAV, MP3, FLAC), performs a FFT ((Fast Fourier Transformation. In this case, Fourier analysis converts a signal from time to a representation in the frequency domain)) analysis on them and then provides the amplitudes at specific frequencies as nodal outputs. This node can load audio files (WAV, MP3, FLAC), performs a FFT ((Fast Fourier Transformation. In this case, Fourier analysis converts a signal from time to a representation in the frequency domain)) analysis on them and then provides the amplitudes at specific frequencies as nodal outputs.
Line 8: Line 8:
  
 You can select frequencies or a range of frequencies couple with a variety of settings to fine tune the output for more specific use. You can select frequencies or a range of frequencies couple with a variety of settings to fine tune the output for more specific use.
 +
 +<WRAP center round info 80%>
 +The sample content includes three sample scenes as well as audio files that show how the Audio Frequency node and channel modifier can be used.
 +</WRAP>
 +
 +{{youtube>n5AO4p_ZNy8?medium}}
 +{{youtube>6s6zimffKlg?medium}}
 +
 +
 +
  
 ====== Technical Background ====== ====== Technical Background ======
Line 24: Line 34:
  
 Once the frequencies have been binned per frame and stored in a cache, the result of the FFT is deleted. The audio file is ready to be used. Once the frequencies have been binned per frame and stored in a cache, the result of the FFT is deleted. The audio file is ready to be used.
 +
 +<WRAP center round important 80%>
 +When either of the plugins are used in Modeler, a fps of 30 is assumed since the scene fps is not available. This may affect loading a motion path saved in Layout to be used in Modeler as well.
 +
 +The fps is used to determined the number of spectrum samples stored in memory per second (one set of samples per frame). If the fps in your scene is different, the result in Modeler will be different as well (especially if interpolate is off).
 +
 +In that case, baking in Layout is the only way to get a 100% accurate representation.
 +</WRAP>
 +
  
  
Line 46: Line 65:
 This will load the currently selected audio file as the File used in Layout, allowing for playback of the audio file. This will load the currently selected audio file as the File used in Layout, allowing for playback of the audio file.
  
-This will not work for some types of audio files, Layout seems to only support WAV and MP3 at 16-bit.+This will not work for some types of audio files, Layout seems to only support WAV and MP3 at 16-bit. It will also not match the audio offset if changed in the plugin, as there is no SDK access to that.
 ===== Settings... ===== ===== Settings... =====
  
Line 132: Line 151:
 ===== Spectrum (norm) ===== ===== Spectrum (norm) =====
  
-Similar to **Frequency (norm)**, this input actually used the Octave bins as opposed to the frequencies. This will lead to a much more pleasant distribution if it's used to colour items based on an index or displace vertices depending on their position.+Similar to **Frequency (norm)**, this input actually uses the Octave bins as opposed to the frequencies. This will lead to a much more pleasant distribution if it's used to colour items based on an index or displace vertices depending on their position.
  
  
tools/audiofrequency.1590498455.txt.gz · Last modified: 2020/05/26 15:07 by lightwolf