Initial revision
diff --git a/Lib/lib-stdwin/Soundogram.py b/Lib/lib-stdwin/Soundogram.py
new file mode 100644
index 0000000..a362eb2
--- /dev/null
+++ b/Lib/lib-stdwin/Soundogram.py
@@ -0,0 +1,37 @@
+# Module 'Soundogram'
+
+import audio
+from minmax import min, max
+from Histogram import Histogram
+
+class Soundogram() = Histogram():
+ #
+ def define(self, (win, chunk)):
+ width, height = corner = win.getwinsize()
+ bounds = (0, 0), corner
+ self.chunk = chunk
+ self.step = (len(chunk)-1)/(width/2+1) + 1
+ ydata = _make_ydata(chunk, self.step)
+ return Histogram.define(self, (win, bounds, ydata, (0, 128)))
+ #
+ def setchunk(self, chunk):
+ self.chunk = chunk
+ self.recompute()
+ #
+ def recompute(self):
+ (left, top), (right, bottom) = self.bounds
+ width = right - left
+ self.step = (len(chunk)-1)/width + 1
+ ydata = _make_ydata(chunk, self.step)
+ self.setdata(ydata, (0, 128))
+ #
+
+
+def _make_ydata(chunk, step):
+ ydata = []
+ for i in range(0, len(chunk), step):
+ piece = audio.chr2num(chunk[i:i+step])
+ mi, ma = min(piece), max(piece)
+ y = max(abs(mi), abs(ma))
+ ydata.append(y)
+ return ydata