3 # Copyright 2004,2006 Free Software Foundation, Inc.
5 # This file is part of GNU Radio
7 # GNU Radio is free software; you can redistribute it and/or modify
8 # it under the terms of the GNU General Public License as published by
9 # the Free Software Foundation; either version 3, or (at your option)
12 # GNU Radio is distributed in the hope that it will be useful,
13 # but WITHOUT ANY WARRANTY; without even the implied warranty of
14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 # GNU General Public License for more details.
17 # You should have received a copy of the GNU General Public License
18 # along with GNU Radio; see the file COPYING. If not, write to
19 # the Free Software Foundation, Inc., 51 Franklin Street,
20 # Boston, MA 02110-1301, USA.
23 from gnuradio import gr
24 from gnuradio import audio
25 from gnuradio.eng_option import eng_option
26 from optparse import OptionParser
30 #raw_input('Attach gdb and press Enter: ')
32 class my_graph(gr.flow_graph):
35 gr.flow_graph.__init__(self)
37 parser = OptionParser(option_class=eng_option)
38 parser.add_option("-O", "--audio-output", type="string", default="",
39 help="pcm output device name. E.g., hw:0,0 or /dev/dsp")
40 parser.add_option("-r", "--sample-rate", type="eng_float", default=48000,
41 help="set sample rate to RATE (48000)")
42 parser.add_option ("-m", "--max-channels", type="int", default="16",
43 help="set maximum channels to use")
44 parser.add_option("-D", "--dont-block", action="store_false", default=True,
46 (options, args) = parser.parse_args ()
51 sample_rate = int(options.sample_rate)
52 limit_channels = options.max_channels
56 # With a tip of the hat to Harry Partch, may he R.I.P.
57 # See "Genesis of a Music". He was into some very wild tunings...
66 # progression = (1, 5, 3, 7)
67 # progression = (1, 9, 3, 7)
68 # progression = (3, 7, 9, 11)
69 # progression = (7, 11, 1, 5)
70 progression = (7, 11, 1, 5, 9)
72 dst = audio.sink (sample_rate,
76 max_chan = dst.input_signature().max_streams()
77 if (max_chan == -1) or (max_chan > limit_channels):
78 max_chan = limit_channels
80 for i in range (max_chan):
81 quo, rem = divmod (i, len (progression))
82 freq = base * ratios[progression[rem]] * (quo + 1)
83 src = gr.sig_source_f (sample_rate, gr.GR_SIN_WAVE, freq, ampl)
84 self.connect (src, (dst, i))
86 if __name__ == '__main__':
89 except KeyboardInterrupt: