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#!/usr/bin/env python
#
# Copyright 2004,2006,2007,2012 Free Software Foundation, Inc.
#
# This file is part of GNU Radio
#
# SPDX-License-Identifier: GPL-3.0-or-later
#
#
from gnuradio import gr
from gnuradio import audio
from gnuradio.eng_arg import eng_float, intx
from argparse import ArgumentParser
try:
from gnuradio import analog
except ImportError:
sys.stderr.write("Error: Program requires gr-analog.\n")
sys.exit(1)
#import os
# print os.getpid()
#raw_input('Attach gdb and press Enter: ')
class my_top_block(gr.top_block):
def __init__(self):
gr.top_block.__init__(self)
parser = ArgumentParser()
parser.add_argument("-O", "--audio-output", default="",
help="pcm output device name. E.g., hw:0,0 or /dev/dsp")
parser.add_argument("-r", "--sample-rate", type=eng_float, default=48000,
help="set sample rate to RATE (%(default)r)")
parser.add_argument("-m", "--max-channels", type=int, default=16,
help="set maximum channels to use")
parser.add_argument("-D", "--dont-block", action="store_false",
dest="ok_to_block")
args = parser.parse_args()
sample_rate = int(args.sample_rate)
limit_channels = args.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,
args.audio_output,
args.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 = analog.sig_source_f(
sample_rate, analog.GR_SIN_WAVE, freq, ampl)
self.connect(src, (dst, i))
if __name__ == '__main__':
try:
my_top_block().run()
except KeyboardInterrupt:
pass
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