python/demos/demo_notes.py: add simple notes demos
authorPaul Brossier <piem@piem.org>
Sat, 17 Dec 2016 11:41:41 +0000 (12:41 +0100)
committerPaul Brossier <piem@piem.org>
Sat, 17 Dec 2016 11:41:41 +0000 (12:41 +0100)
python/demos/demo_notes.py [new file with mode: 0755]

diff --git a/python/demos/demo_notes.py b/python/demos/demo_notes.py
new file mode 100755 (executable)
index 0000000..301013a
--- /dev/null
@@ -0,0 +1,37 @@
+#! /usr/bin/env python
+
+import sys
+from aubio import source, notes
+
+if len(sys.argv) < 2:
+    print("Usage: %s <filename> [samplerate]" % sys.argv[0])
+    sys.exit(1)
+
+filename = sys.argv[1]
+
+downsample = 1
+samplerate = 44100 // downsample
+if len( sys.argv ) > 2: samplerate = int(sys.argv[2])
+
+win_s = 512 // downsample # fft size
+hop_s = 256 // downsample # hop size
+
+s = source(filename, samplerate, hop_s)
+samplerate = s.samplerate
+
+tolerance = 0.8
+
+notes_o = notes("default", win_s, hop_s, samplerate)
+
+print("%8s" % "time","[ start","vel","last ]")
+
+# total number of frames read
+total_frames = 0
+while True:
+    samples, read = s()
+    new_note = notes_o(samples)
+    if (new_note[0] != 0):
+        note_str = ' '.join(["%.2f" % i for i in new_note])
+        print("%.6f" % (total_frames/float(samplerate)), new_note)
+    total_frames += read
+    if read < hop_s: break