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--- ws1617:the_art_of_music:protokolle:07 [2017/02/09 17:39]
cm.mint.2016
+++ ws1617:the_art_of_music:protokolle:07 [2017/02/23 11:46] (aktuell)
cm.mint.2016
@@ Zeile 1: / Zeile 1: @@
 ====== 2017-02-09: ======
-test_moving_circles_1.2___4-Kreise-Frequenzband
+test_moving_circles_1.2 mit 4 Kreisen
+<code python>
+from __future__ import division
+import numpy as np
+import moving_circles
+from scipy.fftpack import *
+from moving_circles import Canvas, Circle
+from microlistener import MicroListener
+# chose 'VISPY' or 'MATPLOTLIB'
+PREFERRED_BACKEND = 'MATPLOTLIB_WX'
+######################################################
+# One possible use case:
+# Use timer event of backend to change graphic objects.
+# Here 10 circles are created and a callback function
+# action(...) is registered to be called at each timer
+# event.
+######################################################
+###micolistener###
+CHANNELS=2
+RATE=44100
+CHUNK=2**11
+z=[]
+def micro_callback(in_data, frame_count, time_info,status):
+	global z
+	y=np.array(np.fromstring(in_data,dtype=np.short),dtype=np.float)
+	yf = fft(y)
+	xf = np.linspace(0.0, (2.0*RATE), CHUNK/2)
+	if CHANNELS==2:
+		y=y.reshape((y.shape[0]//2,2))
+	else:
+		y=y.reshape((y.shape[0],1))
+	#print int(np.linalg.norm(y[:,0])/2000.)*'*'
+	z=np.abs(yf)
+	return (in_data, status)
+listen=MicroListener(RATE,CHANNELS,CHUNK,micro_callback)
+###
+def action(objects, event):
+	global z
+	z_100=z[17:20]			#194-215 Hz
+	z_1000=z[176:196]		#1906-2110 Hz
+	z_6000=z[928:1300]		#10002-13997 Hz
+	#print z[2048]/1000000.0
+	print z_100
+	circ.set_radius((sum(z_1000)/20)/1000000.0)	##1000 Hz (?)
+	circ2.set_radius((sum(z_100)/3)/10000000.0)	##100 Hz (?)
+	circ3.set_radius((sum(z_6000)/372)/50000.0)	##6000 Hz (?)
+    #dt, elapsed = event.dt, event.elapsed
+    #for i,circ in enumerate(objects):
+    #    circ.move(0.7*dt*np.sin(elapsed*(i+1)), 0.7*dt*np.cos(elapsed*(i+1)))
+    #    circ.set_color( (np.abs(np.sin(elapsed*(i+1))),np.abs(np.sin(elapsed*2*(i+1))), np.abs(np.sin(elapsed*3*(i+1))),0.3) )
+# create objects, register callback and start program.
+win = Canvas()
+objects = []
+#for i in range(10):
+#	circ = Circle(win, pos=(-0.6+0.05*i,0), radius=0.1,color = (1,0,0,0.2))
+#	objects.append(circ)
+#coordinates
+x1=0.0
+y1=0.25
+x2=-0.5/np.sqrt(5)
+y2=-0.25/np.sqrt(5)
+x3=0.5/np.sqrt(5)
+y3=-0.25/np.sqrt(5)
+circ = Circle(win, pos=(x1,y1),radius = 0.1, color=(1,0,0,0.4))
+circ2 = Circle(win, pos=(x2,y2),radius = 0.1, color=(0,1,0,0.4))
+circ3 = Circle(win, pos=(x3,y3),radius = 0.1, color=(0,0,1,0.4))
+while True:
+	win.set_action(action, objects)
+	#print z[0]
+	win.run()
+</code>

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