Simple oscillator in python, using pyext (http://grrrr.org/research/software/py/)

osc.py

class osc(pyext._class):

	t = 0.0
	f = 0.0

	def bang_3(self):
		print "SR:",self._samplerate(),"BS:",self._blocksize(),"F:",self.f

	def _dsp(self):
        # if _dsp is present it must return True to enable DSP
		return pyext._arraysupport()

	def _signal(self):
		# not great, since
		# only allow f to change once per block
		self.f = self._invec(0)[0]

		d = self.f*2*pi*(self._blocksize()/self._samplerate())

		self._outvec(0)[:] = np.sin(np.linspace(self.t,self.t+d,self._blocksize()))

		self.t += d

		if self.t > 2.0*pi:
			self.t -= 2.0*pi