Blender Audio Visualisation Script

audio-viz.py

#Audio visualisation script
#
#Created by sirrandalot for Blender 2.71
#Modified by TobiLaForge for Blender 2.76
#Modified by sirrandalot for Blender 2.77
#credits https://www.youtube.com/watch?v=8mskAiSiEjk&feature=youtu.be
#Feel free to modify this script to suit your needs

import bpy
import math

#Here are the variables you can change if you want to quickly
#change your result
#================================================================================
#================================================================================
filename = "file_name.mp3"   #of course you can use other formats than mp3
filepath = "/home/random9/"   
                        
deleteSoundInSequencer = True  #Delete the sound strip currently in blender?                  
addSoundToSequencer = True  #Import the sound strip into blender?

startFrame = 1 #The frame on which to start the song

bars = 64 #number of bars
hScale = 8.0 #vertical scale of the bars
width = 0.8 #width scale of the bars
xDist = 2.25 #horizontal distance between bars (for non-radial vosualiser)

radial = False #True if you want the visualiser to be radial, false otherwise
radius = 20.0 #Radius of the circle
#================================================================================
#================================================================================



#full path and name
filepathAndName = filepath + filename

#Set the window context to the sequencer
bpy.context.area.type = 'SEQUENCE_EDITOR'

#Delete sound strip
if deleteSoundInSequencer:
    bpy.ops.sequencer.select_all(action='SELECT')
    bpy.ops.sequencer.delete()

#Add sound strip
if addSoundToSequencer:
    bpy.ops.sequencer.sound_strip_add(filepath=filepathAndName,frame_start=startFrame, channel=1)


#Set the window context to the Default 3D window 
bpy.context.area.type = 'VIEW_3D'
#Set Keyframe and Cursor location to default
bpy.data.scenes["Scene"].frame_current=startFrame
bpy.context.scene.cursor_location=(0,0,0)


#Number of half steps each bar will cover (approximately)
noteStep = 120.0/bars

#Twelfth root of 2
a = 2**(1.0/12.0)

#start frequencies
l = 0.0
h = 16.0

print('--------------------')

#Iterate through the number of bars
for i in range(0, bars):
    #Add a plane and set it's origin to one of its edges
    bpy.ops.mesh.primitive_plane_add(location = (0, 1, 0))
    bpy.context.scene.cursor_location = bpy.context.active_object.location
    bpy.context.scene.cursor_location.y -= 1
    bpy.ops.object.origin_set(type='ORIGIN_CURSOR')
    
    loc = [0.0, 0.0, 0.0]
    
    #If this is a radial visualiser
    if radial:
        #Rotate bars in equal angles around circle with given radius
        angle = -2*i*math.pi/(bars)
        bpy.context.active_object.rotation_euler[2] = angle
        loc = [-math.sin(angle)*radius, math.cos(angle)*radius, 0]
    else:
        loc[0] = i*xDist
    
    #Set the bar's corrent clocation
    bpy.context.active_object.location = (loc[0], loc[1], loc[2])
    #Set origin to one of its edges again
    bpy.context.scene.cursor_location = (loc[0], loc[1], loc[2])
    bpy.ops.object.origin_set(type='ORIGIN_CURSOR')
    
    #Scale the plane on the x and y axis, then apply the transformation
    bpy.context.active_object.scale.x = width
    bpy.context.active_object.scale.y = hScale
    bpy.ops.object.transform_apply(location=False, rotation=False, scale=True)
    
    #Insert a scaling keyframe and lock the x and z axis
    bpy.ops.anim.keyframe_insert_menu(type='Scaling')
    bpy.context.active_object.animation_data.action.fcurves[0].lock = True
    bpy.context.active_object.animation_data.action.fcurves[2].lock = True
    
    #Set the window context to the graph editor
    bpy.context.area.type = 'GRAPH_EDITOR'
    
    #Expression to determine the frequency ranges of the bars
    l = h
    h = l*(a**noteStep)
    
    #Print the current bar and frequency range to the console/terminal
    print('Bar ' + str(i) + ': ' + str(l) + ' to ' + str(h))
    
    #Bake that range of frequencies to the current plane (along the y axis)
    bpy.ops.graph.sound_bake(filepath=filepathAndName, low = (l), high = (h))
    
    #Lock the y axis
    bpy.context.active_object.animation_data.action.fcurves[1].lock = True

#Change Back to Text Editor to change Equalizer Settings
bpy.context.area.type = 'TEXT_EDITOR'

#Set Animation time to song length
bpy.context.scene.frame_end = bpy.context.scene.sequence_editor.sequences_all[filename].frame_final_duration + startFrame
improved_avis.txt
Open with
Displaying improved_avis.txt.