3 # Copyright 2004,2005,2006 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
28 # Top-level block creating a dial tone
29 # Derives from new class gr.hier_block2
30 class dial_tone(gr.top_block):
32 sample_rate, # Audio output sample rate (int)
33 audio_output, # Audio output device
34 amplitude): # Output volume (0.0-1.0)
36 gr.top_block.__init__(self, "dial_tone")
38 src0 = gr.sig_source_f(sample_rate, gr.GR_SIN_WAVE, 350, amplitude)
39 src1 = gr.sig_source_f(sample_rate, gr.GR_SIN_WAVE, 440, amplitude)
40 dst = audio.sink(sample_rate, audio_output)
42 self.connect(src0, (dst, 0))
43 self.connect(src1, (dst, 1))
45 if __name__ == '__main__':
46 parser = OptionParser(option_class=eng_option)
47 parser.add_option("-O", "--audio-output", type="string", default="",
48 help="pcm output device name. E.g., hw:0,0 or /dev/dsp")
49 parser.add_option("-r", "--sample-rate", type="eng_float", default=48000,
50 help="set sample rate to RATE (48000)")
51 parser.add_option("-a", "--amplitude", type="eng_float", default=0.1,
52 help="set output volume to AMPLITUDE (0.1)")
53 (options, args) = parser.parse_args()
58 # Create an instance of a hierarchical block
59 top = dial_tone(int(options.sample_rate),
66 except KeyboardInterrupt: