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#!/usr/bin/python
###############################################
# A little toy demonstrating PySndObj
#
from Tkinter import *
import sndobj
import math
# set the IO buffersize here
BUFFERSIZE = 2048
# this is our computer instrument
# basically an oscillator and a filter
class Instrument:
def Output(self):
sig = self.fil.Output(0)
return abs(sig)
def SetFreq(self,freq):
self.osc.SetFreq(freq*500)
def SetAmp(self,amp):
self.amp = amp*5000
self.osc.SetAmp(self.amp)
self.fil.SetFreq(self.amp*0.5, None)
def On(self):
self.env.SetCurve(0,self.amp)
self.env.Restart()
def Off(self):
self.env.SetCurve(self.amp, 0)
self.osc.SetAmp(0, self.env)
self.env.Restart()
def __init__(self):
self.amp = 5000
self.tab = sndobj.HarmTable(16384, 25, sndobj.SQUARE)
self.env = sndobj.Interp(0, 0, 0.02)
self.osc = sndobj.Oscili(self.tab, 440, 0, None, self.env)
self.fil = sndobj.Lp(100,0.5,self.osc)
self.outp = sndobj.SndRTIO(1, sndobj.SND_OUTPUT, BUFFERSIZE)
self.outp.SetOutput(1, self.fil)
self.thread = sndobj.SndThread(0, None, self.outp)
self.thread.AddObj(self.env)
self.thread.AddObj(self.osc)
self.thread.AddObj(self.fil)
self.thread.ProcOn()
class Application(Frame):
def move(self,event):
canvas = event.widget
x = canvas.canvasx(event.x)
y = canvas.canvasy(event.y)
item = canvas.find_withtag("current")[0]
canvas.coords(item, x+10, y+10, x-10, y-10)
self.ins.SetFreq(2.0*x/self.size)
self.ins.SetAmp(2.0*(self.size-y)/self.size)
def play(self,event):
note = event.widget.find_withtag("current")[0]
for i in range(1,len(self.notes),2):
if note == self.notes[i]:
val = self.notes[i-1]
self.canvas.itemconfigure(i, fill="red")
self.ins.On()
self.ins.SetFreq(val)
def stop(self,event):
self.on = False
note = event.widget.find_withtag("current")[0]
for i in range(1,len(self.notes),2):
if note == self.notes[i]:
val = self.notes[i-1]
self.ins.Off()
def createCanvas(self):
self.size = 600
self.canvas = Canvas(self,height=self.size,width=self.size,bg="violet")
self.canvas.pack()
def createShapes(self):
item = self.canvas.create_oval(self.size/2-10,self.size/2-10,self.size/2+10,self.size/2+10,fill="black")
self.items.append(item)
self.notes.append(440)
self.notes.append(item)
self.canvas.tag_bind(item,"<ButtonPress>", self.play)
self.canvas.tag_bind(item,"<B1-Motion>", self.move)
self.canvas.tag_bind(item,"<ButtonRelease>", self.stop)
def meter(self):
iw = 10
for i in range(0, self.size, iw):
self.vu.append(self.canvas.create_rectangle(i,self.size-40,i+iw,self.size,fill="grey"))
def draw(self):
level = self.ins.Output()
cnt = 0
red = (self.size/10)*0.8
yellow = (self.size/10)*0.6
for i in self.vu:
if level > cnt*200:
if cnt > red:
self.canvas.itemconfigure(i, fill="red")
elif cnt > yellow:
self.canvas.itemconfigure(i, fill="yellow")
else:
self.canvas.itemconfigure(i, fill="blue")
else:
self.canvas.itemconfigure(i, fill="grey")
cnt = cnt + 1
self.master.after(50,self.draw)
def quit(self):
self.master.destroy()
def __init__(self,master=None):
master.title("PySndObj + Tkinter: just click and play")
self.items = []
self.notes = []
Frame.__init__(self,master)
self.pack()
self.createCanvas()
self.createShapes()
self.ins = Instrument()
self.vu = []
self.meter()
master.after(100, self.draw),
self.master = master
self.master.protocol("WM_DELETE_WINDOW", self.quit)
app = Application(Tk())
app.mainloop()
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