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#!/usr/bin/env python
#
# Copyright 2007 Free Software Foundation, Inc.
#
# This file is part of GNU Radio
#
# SPDX-License-Identifier: GPL-3.0-or-later
#
#
from __future__ import unicode_literals
from gnuradio import gr
from gnuradio import audio
from gnuradio import digital
from gnuradio.eng_arg import eng_float
from argparse import ArgumentParser
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 (48000)")
args = parser.parse_args()
sample_rate = int(args.sample_rate)
ampl = 0.1
src = digital.glfsr_source_b(32) # Pseudorandom noise source
b2f = digital.chunks_to_symbols_bf([ampl, -ampl], 1)
dst = audio.sink(sample_rate, args.audio_output)
self.connect(src, b2f, dst)
if __name__ == '__main__':
try:
my_top_block().run()
except KeyboardInterrupt:
pass
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