1 files changed, 90 insertions, 0 deletions
diff --git a/gnuradio-examples/python/audio/multi_tone.py b/gnuradio-examples/python/audio/multi_tone.py
new file mode 100755
index 000000000..c6f83050e
--- /dev/null
+++ b/gnuradio-examples/python/audio/multi_tone.py
@@ -0,0 +1,90 @@
+#!/usr/bin/env python
+#
+# Copyright 2004,2006 Free Software Foundation, Inc.
+# 
+# This file is part of GNU Radio
+# 
+# GNU Radio is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2, or (at your option)
+# any later version.
+# 
+# GNU Radio is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+# 
+# You should have received a copy of the GNU General Public License
+# along with GNU Radio; see the file COPYING.  If not, write to
+# the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+# Boston, MA 02111-1307, USA.
+# 
+
+from gnuradio import gr
+from gnuradio import audio
+from gnuradio.eng_option import eng_option
+from optparse import OptionParser
+
+#import os
+#print os.getpid()
+#raw_input('Attach gdb and press Enter: ')
+
+class my_graph(gr.flow_graph):
+
+    def __init__(self):
+        gr.flow_graph.__init__(self)
+
+        parser = OptionParser(option_class=eng_option)
+        parser.add_option("-O", "--audio-output", type="string", default="",
+                          help="pcm output device name.  E.g., hw:0,0 or /dev/dsp")
+        parser.add_option("-r", "--sample-rate", type="eng_float", default=48000,
+                          help="set sample rate to RATE (48000)")
+        parser.add_option ("-m", "--max-channels", type="int", default="16",
+                           help="set maximum channels to use")
+        parser.add_option("-D", "--dont-block", action="store_false", default=True,
+                          dest="ok_to_block")
+        (options, args) = parser.parse_args ()
+        if len(args) != 0:
+            parser.print_help()
+            raise SystemExit, 1
+
+        sample_rate = int(options.sample_rate)
+        limit_channels = options.max_channels
+
+        ampl = 0.1
+
+        # With a tip of the hat to Harry Partch, may he R.I.P.
+        # See "Genesis of a Music".  He was into some very wild tunings...
+        base = 392
+        ratios = { 1 : 1.0,
+                   3 : 3.0/2,
+                   5 : 5.0/4,
+                   7 : 7.0/4,
+                   9 : 9.0/8,
+                   11 : 11.0/8 }
+
+        # progression = (1, 5, 3, 7)
+        # progression = (1, 9, 3, 7)
+        # progression = (3, 7, 9, 11)
+        # progression = (7, 11, 1, 5)
+        progression = (7, 11, 1, 5, 9)
+
+        dst = audio.sink (sample_rate,
+                          options.audio_output,
+                          options.ok_to_block)
+    
+        max_chan = dst.input_signature().max_streams()
+        if (max_chan == -1) or (max_chan > limit_channels):
+            max_chan = limit_channels
+
+        for i in range (max_chan):
+            quo, rem = divmod (i, len (progression))
+            freq = base * ratios[progression[rem]] * (quo + 1)
+            src = gr.sig_source_f (sample_rate, gr.GR_SIN_WAVE, freq, ampl)
+            self.connect (src, (dst, i))
+
+if __name__ == '__main__':
+    try:
+        my_graph().run()
+    except KeyboardInterrupt:
+        pass