Initial revision
diff --git a/Lib/lib-stdwin/VUMeter.py b/Lib/lib-stdwin/VUMeter.py
new file mode 100644
index 0000000..65c018b
--- /dev/null
+++ b/Lib/lib-stdwin/VUMeter.py
@@ -0,0 +1,46 @@
+# Module VUMeter
+
+import audio
+from StripChart import StripChart
+
+K = 1024
+Rates = [0, 32*K, 16*K, 8*K]
+
+class VUMeter() = StripChart():
+ #
+ # Override define() and timer() methods
+ #
+ def define(self, (win, bounds)):
+ self = StripChart.define(self, (win, bounds, 128))
+ self.sampling = 0
+ self.rate = 3
+ self.enable(0)
+ return self
+ #
+ def timer(self):
+ if self.sampling:
+ chunk = audio.wait_recording()
+ self.sampling = 0
+ nums = audio.chr2num(chunk)
+ ampl = max(abs(min(nums)), abs(max(nums)))
+ self.append(ampl)
+ if self.enabled and not self.sampling:
+ audio.setrate(self.rate)
+ size = Rates[self.rate]/10
+ size = size/48*48
+ audio.start_recording(size)
+ self.sampling = 1
+ if self.sampling:
+ self.win.settimer(1)
+ #
+ # New methods: start() and stop()
+ #
+ def stop(self):
+ if self.sampling:
+ chunk = audio.stop_recording()
+ self.sampling = 0
+ self.enable(0)
+ #
+ def start(self):
+ self.enable(1)
+ self.timer()