README change

1 files changed, 43 insertions, 0 deletions

diff --git a/docs/exploring-gnuradio/dial_tone.py b/docs/exploring-gnuradio/dial_tone.py
new file mode 100755
index 000000000..cabfa0864
--- /dev/null
+++ b/docs/exploring-gnuradio/dial_tone.py
@@ -0,0 +1,43 @@
+#!/usr/bin/env python
+#
+# Copyright 2004,2007 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 3, 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., 51 Franklin Street,
+# Boston, MA 02110-1301, USA.
+#
+
+from gnuradio import gr
+from gnuradio import audio
+
+def build_graph ():
+    sampling_freq = 32000
+    ampl = 0.1
+
+    tb = gr.top_block ()
+    src0 = gr.sig_source_f (sampling_freq, gr.GR_SIN_WAVE, 350, ampl)
+    src1 = gr.sig_source_f (sampling_freq, gr.GR_SIN_WAVE, 440, ampl)
+    dst = audio.sink (sampling_freq)
+    tb.connect (src0, (dst, 0))
+    tb.connect (src1, (dst, 1))
+
+    return tb
+
+if __name__ == '__main__':
+    tb = build_graph ()
+    tb.start ()
+    raw_input ('Press Enter to quit: ')
+    tb.stop ()