3 # Copyright 2004,2005,2007,2008 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, gru
24 from gnuradio import audio
25 from gnuradio.eng_option import eng_option
26 from optparse import OptionParser
29 class my_top_block(gr.top_block):
32 gr.top_block.__init__(self)
34 parser = OptionParser(option_class=eng_option)
35 parser.add_option("-O", "--audio-output", type="string", default="",
36 help="pcm output device name. E.g., hw:0,0 or /dev/dsp")
37 parser.add_option("-r", "--sample-rate", type="eng_float", default=48000,
38 help="set sample rate to RATE (48000)")
39 (options, args) = parser.parse_args ()
44 sample_rate = int(options.sample_rate)
47 src0 = gr.sig_source_f (sample_rate, gr.GR_SIN_WAVE, 350, ampl)
48 src1 = gr.sig_source_f (sample_rate, gr.GR_SIN_WAVE, 440, ampl)
49 dst = audio.sink (sample_rate, options.audio_output)
50 self.connect (src0, (dst, 0))
51 self.connect (src1, (dst, 1))
54 if __name__ == '__main__':
56 print "To stop this program, enter 'kill %d'" % pid