Update examples

Author: ideoforms

examples/signalflow/01.example-signalflow-create-patch.py

@@ -10,7 +10,6 @@
 #--------------------------------------------------------------------------------
 
 from isobar import *
-from isobar.io import SignalFlowOutputDevice
 from signalflow import *
 
 class Ping (Patch):

examples/signalflow/02.example-signalflow-modify-patch.py

@@ -10,7 +10,6 @@
 #--------------------------------------------------------------------------------
 
 from isobar import *
-from isobar.io import SignalFlowOutputDevice
 from signalflow import *
 
 class Squelch (Patch):
@@ -25,7 +24,7 @@ def __init__(self, cutoff: float = 110, resonance: float = 0.8):
 graph = AudioGraph()
 output_device = SignalFlowOutputDevice(graph=graph)
 
-patch = Tone()
+patch = Squelch()
 patch.play()
 
 timeline = Timeline(120, output_device=output_device)

examples/signalflow/03.example-signalflow-trigger-patch.py

@@ -10,7 +10,6 @@
 #--------------------------------------------------------------------------------
 
 from isobar import *
-from isobar.io import SignalFlowOutputDevice
 from signalflow import *
 
 class Cymbal (Patch):