From a922b8db3f36eb867edfee5cc6ac2a6f8fafad8f Mon Sep 17 00:00:00 2001
From: LuKe Tidd <lukeisgreat@gmail.com>
Date: Mon, 12 Feb 2024 19:05:17 -0500
Subject: [PATCH] created a static radio player

---
 ex 1.grc                      | 641 ++++++++++++++++++++++++++++++++++
 static_radio_ttf_and_audio.py | 219 ++++++++++++
 2 files changed, 860 insertions(+)
 create mode 100644 ex 1.grc
 create mode 100755 static_radio_ttf_and_audio.py

diff --git a/ex 1.grc b/ex 1.grc
new file mode 100644
index 0000000..24080b8
--- /dev/null
+++ b/ex 1.grc	
@@ -0,0 +1,641 @@
+options:
+  parameters:
+    author: ''
+    catch_exceptions: 'True'
+    category: '[GRC Hier Blocks]'
+    cmake_opt: ''
+    comment: ''
+    copyright: ''
+    description: ''
+    gen_cmake: 'On'
+    gen_linking: dynamic
+    generate_options: qt_gui
+    hier_block_src_path: '.:'
+    id: ex1
+    max_nouts: '0'
+    output_language: python
+    placement: (0,0)
+    qt_qss_theme: ''
+    realtime_scheduling: ''
+    run: 'True'
+    run_command: '{python} -u {filename}'
+    run_options: prompt
+    sizing_mode: fixed
+    thread_safe_setters: ''
+    title: fm radio example
+    window_size: (1000,1000)
+  states:
+    bus_sink: false
+    bus_source: false
+    bus_structure: null
+    coordinate: [8, 8]
+    rotation: 0
+    state: enabled
+
+blocks:
+- name: center_freq
+  id: variable
+  parameters:
+    comment: ''
+    value: 97.9e6
+  states:
+    bus_sink: false
+    bus_source: false
+    bus_structure: null
+    coordinate: [168, 784.0]
+    rotation: 0
+    state: enabled
+- name: channel_freq
+  id: variable
+  parameters:
+    comment: ''
+    value: '96100000.0'
+  states:
+    bus_sink: false
+    bus_source: false
+    bus_structure: null
+    coordinate: [48, 864.0]
+    rotation: 0
+    state: enabled
+- name: channel_width
+  id: variable
+  parameters:
+    comment: ''
+    value: 200e3
+  states:
+    bus_sink: false
+    bus_source: false
+    bus_structure: null
+    coordinate: [168, 864.0]
+    rotation: 0
+    state: enabled
+- name: samp_rate
+  id: variable
+  parameters:
+    comment: ''
+    value: 20e6
+  states:
+    bus_sink: false
+    bus_source: false
+    bus_structure: null
+    coordinate: [64, 784.0]
+    rotation: 0
+    state: enabled
+- name: volume_adjust
+  id: variable_qtgui_range
+  parameters:
+    comment: ''
+    gui_hint: ''
+    label: ''
+    min_len: '200'
+    orient: QtCore.Qt.Horizontal
+    rangeType: float
+    start: '0'
+    step: '.01'
+    stop: '5'
+    value: '1'
+    widget: counter_slider
+  states:
+    bus_sink: false
+    bus_source: false
+    bus_structure: null
+    coordinate: [984, 872.0]
+    rotation: 0
+    state: enabled
+- name: analog_sig_source_x_0
+  id: analog_sig_source_x
+  parameters:
+    affinity: ''
+    alias: ''
+    amp: '1'
+    comment: ''
+    freq: center_freq - channel_freq
+    maxoutbuf: '0'
+    minoutbuf: '0'
+    offset: '0'
+    phase: '0'
+    samp_rate: samp_rate
+    showports: 'False'
+    type: complex
+    waveform: analog.GR_COS_WAVE
+  states:
+    bus_sink: false
+    bus_source: false
+    bus_structure: null
+    coordinate: [128, 616.0]
+    rotation: 0
+    state: enabled
+- name: analog_wfm_rcv_0
+  id: analog_wfm_rcv
+  parameters:
+    affinity: ''
+    alias: ''
+    audio_decimation: '10'
+    comment: ''
+    maxoutbuf: '0'
+    minoutbuf: '0'
+    quad_rate: '48000'
+  states:
+    bus_sink: false
+    bus_source: false
+    bus_structure: null
+    coordinate: [816, 608.0]
+    rotation: 0
+    state: enabled
+- name: audio_sink_0
+  id: audio_sink
+  parameters:
+    affinity: ''
+    alias: ''
+    comment: ''
+    device_name: ''
+    num_inputs: '1'
+    ok_to_block: 'True'
+    samp_rate: '48000'
+  states:
+    bus_sink: false
+    bus_source: false
+    bus_structure: null
+    coordinate: [1080, 504.0]
+    rotation: 0
+    state: enabled
+- name: blocks_multiply_const_vxx_0
+  id: blocks_multiply_const_vxx
+  parameters:
+    affinity: ''
+    alias: ''
+    comment: ''
+    const: volume_adjust
+    maxoutbuf: '0'
+    minoutbuf: '0'
+    type: float
+    vlen: '1'
+  states:
+    bus_sink: false
+    bus_source: false
+    bus_structure: null
+    coordinate: [1048, 672.0]
+    rotation: 0
+    state: enabled
+- name: blocks_multiply_xx_0
+  id: blocks_multiply_xx
+  parameters:
+    affinity: ''
+    alias: ''
+    comment: ''
+    maxoutbuf: '0'
+    minoutbuf: '0'
+    num_inputs: '2'
+    type: complex
+    vlen: '1'
+  states:
+    bus_sink: false
+    bus_source: false
+    bus_structure: null
+    coordinate: [440, 552.0]
+    rotation: 0
+    state: enabled
+- name: low_pass_filter_0
+  id: low_pass_filter
+  parameters:
+    affinity: ''
+    alias: ''
+    beta: '6.76'
+    comment: ''
+    cutoff_freq: 75e3
+    decim: int(samp_rate/channel_width)
+    gain: '1'
+    interp: '1'
+    maxoutbuf: '0'
+    minoutbuf: '0'
+    samp_rate: samp_rate
+    type: fir_filter_ccf
+    width: 25e3
+    win: window.WIN_HAMMING
+  states:
+    bus_sink: false
+    bus_source: false
+    bus_structure: null
+    coordinate: [488, 748.0]
+    rotation: 0
+    state: enabled
+- name: osmosdr_source_0
+  id: osmosdr_source
+  parameters:
+    affinity: ''
+    alias: ''
+    ant0: ''
+    ant1: ''
+    ant10: ''
+    ant11: ''
+    ant12: ''
+    ant13: ''
+    ant14: ''
+    ant15: ''
+    ant16: ''
+    ant17: ''
+    ant18: ''
+    ant19: ''
+    ant2: ''
+    ant20: ''
+    ant21: ''
+    ant22: ''
+    ant23: ''
+    ant24: ''
+    ant25: ''
+    ant26: ''
+    ant27: ''
+    ant28: ''
+    ant29: ''
+    ant3: ''
+    ant30: ''
+    ant31: ''
+    ant4: ''
+    ant5: ''
+    ant6: ''
+    ant7: ''
+    ant8: ''
+    ant9: ''
+    args: '""'
+    bb_gain0: '20'
+    bb_gain1: '20'
+    bb_gain10: '20'
+    bb_gain11: '20'
+    bb_gain12: '20'
+    bb_gain13: '20'
+    bb_gain14: '20'
+    bb_gain15: '20'
+    bb_gain16: '20'
+    bb_gain17: '20'
+    bb_gain18: '20'
+    bb_gain19: '20'
+    bb_gain2: '20'
+    bb_gain20: '20'
+    bb_gain21: '20'
+    bb_gain22: '20'
+    bb_gain23: '20'
+    bb_gain24: '20'
+    bb_gain25: '20'
+    bb_gain26: '20'
+    bb_gain27: '20'
+    bb_gain28: '20'
+    bb_gain29: '20'
+    bb_gain3: '20'
+    bb_gain30: '20'
+    bb_gain31: '20'
+    bb_gain4: '20'
+    bb_gain5: '20'
+    bb_gain6: '20'
+    bb_gain7: '20'
+    bb_gain8: '20'
+    bb_gain9: '20'
+    bw0: '0'
+    bw1: '0'
+    bw10: '0'
+    bw11: '0'
+    bw12: '0'
+    bw13: '0'
+    bw14: '0'
+    bw15: '0'
+    bw16: '0'
+    bw17: '0'
+    bw18: '0'
+    bw19: '0'
+    bw2: '0'
+    bw20: '0'
+    bw21: '0'
+    bw22: '0'
+    bw23: '0'
+    bw24: '0'
+    bw25: '0'
+    bw26: '0'
+    bw27: '0'
+    bw28: '0'
+    bw29: '0'
+    bw3: '0'
+    bw30: '0'
+    bw31: '0'
+    bw4: '0'
+    bw5: '0'
+    bw6: '0'
+    bw7: '0'
+    bw8: '0'
+    bw9: '0'
+    clock_source0: ''
+    clock_source1: ''
+    clock_source2: ''
+    clock_source3: ''
+    clock_source4: ''
+    clock_source5: ''
+    clock_source6: ''
+    clock_source7: ''
+    comment: ''
+    corr0: '0'
+    corr1: '0'
+    corr10: '0'
+    corr11: '0'
+    corr12: '0'
+    corr13: '0'
+    corr14: '0'
+    corr15: '0'
+    corr16: '0'
+    corr17: '0'
+    corr18: '0'
+    corr19: '0'
+    corr2: '0'
+    corr20: '0'
+    corr21: '0'
+    corr22: '0'
+    corr23: '0'
+    corr24: '0'
+    corr25: '0'
+    corr26: '0'
+    corr27: '0'
+    corr28: '0'
+    corr29: '0'
+    corr3: '0'
+    corr30: '0'
+    corr31: '0'
+    corr4: '0'
+    corr5: '0'
+    corr6: '0'
+    corr7: '0'
+    corr8: '0'
+    corr9: '0'
+    dc_offset_mode0: '0'
+    dc_offset_mode1: '0'
+    dc_offset_mode10: '0'
+    dc_offset_mode11: '0'
+    dc_offset_mode12: '0'
+    dc_offset_mode13: '0'
+    dc_offset_mode14: '0'
+    dc_offset_mode15: '0'
+    dc_offset_mode16: '0'
+    dc_offset_mode17: '0'
+    dc_offset_mode18: '0'
+    dc_offset_mode19: '0'
+    dc_offset_mode2: '0'
+    dc_offset_mode20: '0'
+    dc_offset_mode21: '0'
+    dc_offset_mode22: '0'
+    dc_offset_mode23: '0'
+    dc_offset_mode24: '0'
+    dc_offset_mode25: '0'
+    dc_offset_mode26: '0'
+    dc_offset_mode27: '0'
+    dc_offset_mode28: '0'
+    dc_offset_mode29: '0'
+    dc_offset_mode3: '0'
+    dc_offset_mode30: '0'
+    dc_offset_mode31: '0'
+    dc_offset_mode4: '0'
+    dc_offset_mode5: '0'
+    dc_offset_mode6: '0'
+    dc_offset_mode7: '0'
+    dc_offset_mode8: '0'
+    dc_offset_mode9: '0'
+    freq0: center_freq
+    freq1: 100e6
+    freq10: 100e6
+    freq11: 100e6
+    freq12: 100e6
+    freq13: 100e6
+    freq14: 100e6
+    freq15: 100e6
+    freq16: 100e6
+    freq17: 100e6
+    freq18: 100e6
+    freq19: 100e6
+    freq2: 100e6
+    freq20: 100e6
+    freq21: 100e6
+    freq22: 100e6
+    freq23: 100e6
+    freq24: 100e6
+    freq25: 100e6
+    freq26: 100e6
+    freq27: 100e6
+    freq28: 100e6
+    freq29: 100e6
+    freq3: 100e6
+    freq30: 100e6
+    freq31: 100e6
+    freq4: 100e6
+    freq5: 100e6
+    freq6: 100e6
+    freq7: 100e6
+    freq8: 100e6
+    freq9: 100e6
+    gain0: '0'
+    gain1: '10'
+    gain10: '10'
+    gain11: '10'
+    gain12: '10'
+    gain13: '10'
+    gain14: '10'
+    gain15: '10'
+    gain16: '10'
+    gain17: '10'
+    gain18: '10'
+    gain19: '10'
+    gain2: '10'
+    gain20: '10'
+    gain21: '10'
+    gain22: '10'
+    gain23: '10'
+    gain24: '10'
+    gain25: '10'
+    gain26: '10'
+    gain27: '10'
+    gain28: '10'
+    gain29: '10'
+    gain3: '10'
+    gain30: '10'
+    gain31: '10'
+    gain4: '10'
+    gain5: '10'
+    gain6: '10'
+    gain7: '10'
+    gain8: '10'
+    gain9: '10'
+    gain_mode0: 'False'
+    gain_mode1: 'False'
+    gain_mode10: 'False'
+    gain_mode11: 'False'
+    gain_mode12: 'False'
+    gain_mode13: 'False'
+    gain_mode14: 'False'
+    gain_mode15: 'False'
+    gain_mode16: 'False'
+    gain_mode17: 'False'
+    gain_mode18: 'False'
+    gain_mode19: 'False'
+    gain_mode2: 'False'
+    gain_mode20: 'False'
+    gain_mode21: 'False'
+    gain_mode22: 'False'
+    gain_mode23: 'False'
+    gain_mode24: 'False'
+    gain_mode25: 'False'
+    gain_mode26: 'False'
+    gain_mode27: 'False'
+    gain_mode28: 'False'
+    gain_mode29: 'False'
+    gain_mode3: 'False'
+    gain_mode30: 'False'
+    gain_mode31: 'False'
+    gain_mode4: 'False'
+    gain_mode5: 'False'
+    gain_mode6: 'False'
+    gain_mode7: 'False'
+    gain_mode8: 'False'
+    gain_mode9: 'False'
+    if_gain0: '20'
+    if_gain1: '20'
+    if_gain10: '20'
+    if_gain11: '20'
+    if_gain12: '20'
+    if_gain13: '20'
+    if_gain14: '20'
+    if_gain15: '20'
+    if_gain16: '20'
+    if_gain17: '20'
+    if_gain18: '20'
+    if_gain19: '20'
+    if_gain2: '20'
+    if_gain20: '20'
+    if_gain21: '20'
+    if_gain22: '20'
+    if_gain23: '20'
+    if_gain24: '20'
+    if_gain25: '20'
+    if_gain26: '20'
+    if_gain27: '20'
+    if_gain28: '20'
+    if_gain29: '20'
+    if_gain3: '20'
+    if_gain30: '20'
+    if_gain31: '20'
+    if_gain4: '20'
+    if_gain5: '20'
+    if_gain6: '20'
+    if_gain7: '20'
+    if_gain8: '20'
+    if_gain9: '20'
+    iq_balance_mode0: '0'
+    iq_balance_mode1: '0'
+    iq_balance_mode10: '0'
+    iq_balance_mode11: '0'
+    iq_balance_mode12: '0'
+    iq_balance_mode13: '0'
+    iq_balance_mode14: '0'
+    iq_balance_mode15: '0'
+    iq_balance_mode16: '0'
+    iq_balance_mode17: '0'
+    iq_balance_mode18: '0'
+    iq_balance_mode19: '0'
+    iq_balance_mode2: '0'
+    iq_balance_mode20: '0'
+    iq_balance_mode21: '0'
+    iq_balance_mode22: '0'
+    iq_balance_mode23: '0'
+    iq_balance_mode24: '0'
+    iq_balance_mode25: '0'
+    iq_balance_mode26: '0'
+    iq_balance_mode27: '0'
+    iq_balance_mode28: '0'
+    iq_balance_mode29: '0'
+    iq_balance_mode3: '0'
+    iq_balance_mode30: '0'
+    iq_balance_mode31: '0'
+    iq_balance_mode4: '0'
+    iq_balance_mode5: '0'
+    iq_balance_mode6: '0'
+    iq_balance_mode7: '0'
+    iq_balance_mode8: '0'
+    iq_balance_mode9: '0'
+    maxoutbuf: '0'
+    minoutbuf: '0'
+    nchan: '1'
+    num_mboards: '1'
+    sample_rate: samp_rate
+    sync: sync
+    time_source0: ''
+    time_source1: ''
+    time_source2: ''
+    time_source3: ''
+    time_source4: ''
+    time_source5: ''
+    time_source6: ''
+    time_source7: ''
+    type: fc32
+  states:
+    bus_sink: false
+    bus_source: false
+    bus_structure: null
+    coordinate: [96, 380.0]
+    rotation: 0
+    state: enabled
+- name: qtgui_sink_x_0_0
+  id: qtgui_sink_x
+  parameters:
+    affinity: ''
+    alias: ''
+    bw: samp_rate
+    comment: ''
+    fc: channel_freq
+    fftsize: '32768'
+    gui_hint: ''
+    maxoutbuf: '0'
+    minoutbuf: '0'
+    name: '""'
+    plotconst: 'True'
+    plotfreq: 'True'
+    plottime: 'True'
+    plotwaterfall: 'True'
+    rate: '10'
+    showports: 'False'
+    showrf: 'True'
+    type: complex
+    wintype: window.WIN_BLACKMAN_hARRIS
+  states:
+    bus_sink: false
+    bus_source: false
+    bus_structure: null
+    coordinate: [800, 280.0]
+    rotation: 0
+    state: enabled
+- name: rational_resampler_xxx_0
+  id: rational_resampler_xxx
+  parameters:
+    affinity: ''
+    alias: ''
+    comment: ''
+    decim: '5'
+    fbw: '0'
+    interp: '12'
+    maxoutbuf: '0'
+    minoutbuf: '0'
+    taps: '[]'
+    type: ccc
+  states:
+    bus_sink: false
+    bus_source: false
+    bus_structure: null
+    coordinate: [608, 560.0]
+    rotation: 0
+    state: enabled
+
+connections:
+- [analog_sig_source_x_0, '0', blocks_multiply_xx_0, '1']
+- [analog_wfm_rcv_0, '0', blocks_multiply_const_vxx_0, '0']
+- [blocks_multiply_const_vxx_0, '0', audio_sink_0, '0']
+- [blocks_multiply_xx_0, '0', low_pass_filter_0, '0']
+- [blocks_multiply_xx_0, '0', qtgui_sink_x_0_0, '0']
+- [low_pass_filter_0, '0', rational_resampler_xxx_0, '0']
+- [osmosdr_source_0, '0', blocks_multiply_xx_0, '0']
+- [rational_resampler_xxx_0, '0', analog_wfm_rcv_0, '0']
+
+metadata:
+  file_format: 1
+  grc_version: 3.10.9.2
diff --git a/static_radio_ttf_and_audio.py b/static_radio_ttf_and_audio.py
new file mode 100755
index 0000000..3f47a75
--- /dev/null
+++ b/static_radio_ttf_and_audio.py
@@ -0,0 +1,219 @@
+#!/usr/bin/env python3
+
+from PyQt5 import Qt
+from gnuradio import qtgui
+from PyQt5 import QtCore
+from gnuradio import analog
+from gnuradio import audio
+from gnuradio import blocks
+from gnuradio import filter
+from gnuradio.filter import firdes
+from gnuradio import gr
+from gnuradio.fft import window
+import sys
+import signal
+from PyQt5 import Qt
+from argparse import ArgumentParser
+from gnuradio.eng_arg import eng_float, intx
+from gnuradio import eng_notation
+import osmosdr
+import time
+import sip
+
+
+
+class ex1(gr.top_block, Qt.QWidget):
+
+    def __init__(self):
+        gr.top_block.__init__(self, "fm radio example", catch_exceptions=True)
+        Qt.QWidget.__init__(self)
+        self.setWindowTitle("fm radio example")
+        qtgui.util.check_set_qss()
+        try:
+            self.setWindowIcon(Qt.QIcon.fromTheme('gnuradio-grc'))
+        except BaseException as exc:
+            print(f"Qt GUI: Could not set Icon: {str(exc)}", file=sys.stderr)
+        self.top_scroll_layout = Qt.QVBoxLayout()
+        self.setLayout(self.top_scroll_layout)
+        self.top_scroll = Qt.QScrollArea()
+        self.top_scroll.setFrameStyle(Qt.QFrame.NoFrame)
+        self.top_scroll_layout.addWidget(self.top_scroll)
+        self.top_scroll.setWidgetResizable(True)
+        self.top_widget = Qt.QWidget()
+        self.top_scroll.setWidget(self.top_widget)
+        self.top_layout = Qt.QVBoxLayout(self.top_widget)
+        self.top_grid_layout = Qt.QGridLayout()
+        self.top_layout.addLayout(self.top_grid_layout)
+
+        self.settings = Qt.QSettings("GNU Radio", "ex1")
+
+        try:
+            geometry = self.settings.value("geometry")
+            if geometry:
+                self.restoreGeometry(geometry)
+        except BaseException as exc:
+            print(f"Qt GUI: Could not restore geometry: {str(exc)}", file=sys.stderr)
+
+        ##################################################
+        # Variables
+        ##################################################
+        self.volume_adjust = volume_adjust = 1
+        self.samp_rate = samp_rate = 20e6
+        self.channel_width = channel_width = 200e3
+        self.channel_freq = channel_freq = 96100000.0
+        self.center_freq = center_freq = 97.9e6
+
+        ##################################################
+        # Blocks
+        ##################################################
+
+        self._volume_adjust_range = qtgui.Range(0, 5, .01, 1, 200)
+        self._volume_adjust_win = qtgui.RangeWidget(self._volume_adjust_range, self.set_volume_adjust, "'volume_adjust'", "counter_slider", float, QtCore.Qt.Horizontal)
+        self.top_layout.addWidget(self._volume_adjust_win)
+        self.rational_resampler_xxx_0 = filter.rational_resampler_ccc(
+                interpolation=12,
+                decimation=5,
+                taps=[],
+                fractional_bw=0)
+        self.qtgui_sink_x_0_0 = qtgui.sink_c(
+            32768, #fftsize
+            window.WIN_BLACKMAN_hARRIS, #wintype
+            channel_freq, #fc
+            samp_rate, #bw
+            "", #name
+            True, #plotfreq
+            True, #plotwaterfall
+            True, #plottime
+            True, #plotconst
+            None # parent
+        )
+        self.qtgui_sink_x_0_0.set_update_time(1.0/10)
+        self._qtgui_sink_x_0_0_win = sip.wrapinstance(self.qtgui_sink_x_0_0.qwidget(), Qt.QWidget)
+
+        self.qtgui_sink_x_0_0.enable_rf_freq(True)
+
+        self.top_layout.addWidget(self._qtgui_sink_x_0_0_win)
+        self.osmosdr_source_0 = osmosdr.source(
+            args="numchan=" + str(1) + " " + ""
+        )
+        self.osmosdr_source_0.set_time_unknown_pps(osmosdr.time_spec_t())
+        self.osmosdr_source_0.set_sample_rate(samp_rate)
+        self.osmosdr_source_0.set_center_freq(center_freq, 0)
+        self.osmosdr_source_0.set_freq_corr(0, 0)
+        self.osmosdr_source_0.set_dc_offset_mode(0, 0)
+        self.osmosdr_source_0.set_iq_balance_mode(0, 0)
+        self.osmosdr_source_0.set_gain_mode(False, 0)
+        self.osmosdr_source_0.set_gain(0, 0)
+        self.osmosdr_source_0.set_if_gain(20, 0)
+        self.osmosdr_source_0.set_bb_gain(20, 0)
+        self.osmosdr_source_0.set_antenna('', 0)
+        self.osmosdr_source_0.set_bandwidth(0, 0)
+        self.low_pass_filter_0 = filter.fir_filter_ccf(
+            (int(samp_rate/channel_width)),
+            firdes.low_pass(
+                1,
+                samp_rate,
+                75e3,
+                25e3,
+                window.WIN_HAMMING,
+                6.76))
+        self.blocks_multiply_xx_0 = blocks.multiply_vcc(1)
+        self.blocks_multiply_const_vxx_0 = blocks.multiply_const_ff(volume_adjust)
+        self.audio_sink_0 = audio.sink(48000, '', True)
+        self.analog_wfm_rcv_0 = analog.wfm_rcv(
+        	quad_rate=48000,
+        	audio_decimation=10,
+        )
+        self.analog_sig_source_x_0 = analog.sig_source_c(samp_rate, analog.GR_COS_WAVE, (center_freq - channel_freq), 1, 0, 0)
+
+
+        ##################################################
+        # Connections
+        ##################################################
+        self.connect((self.analog_sig_source_x_0, 0), (self.blocks_multiply_xx_0, 1))
+        self.connect((self.analog_wfm_rcv_0, 0), (self.blocks_multiply_const_vxx_0, 0))
+        self.connect((self.blocks_multiply_const_vxx_0, 0), (self.audio_sink_0, 0))
+        self.connect((self.blocks_multiply_xx_0, 0), (self.low_pass_filter_0, 0))
+        self.connect((self.blocks_multiply_xx_0, 0), (self.qtgui_sink_x_0_0, 0))
+        self.connect((self.low_pass_filter_0, 0), (self.rational_resampler_xxx_0, 0))
+        self.connect((self.osmosdr_source_0, 0), (self.blocks_multiply_xx_0, 0))
+        self.connect((self.rational_resampler_xxx_0, 0), (self.analog_wfm_rcv_0, 0))
+
+
+    def closeEvent(self, event):
+        self.settings = Qt.QSettings("GNU Radio", "ex1")
+        self.settings.setValue("geometry", self.saveGeometry())
+        self.stop()
+        self.wait()
+
+        event.accept()
+
+    def get_volume_adjust(self):
+        return self.volume_adjust
+
+    def set_volume_adjust(self, volume_adjust):
+        self.volume_adjust = volume_adjust
+        self.blocks_multiply_const_vxx_0.set_k(self.volume_adjust)
+
+    def get_samp_rate(self):
+        return self.samp_rate
+
+    def set_samp_rate(self, samp_rate):
+        self.samp_rate = samp_rate
+        self.analog_sig_source_x_0.set_sampling_freq(self.samp_rate)
+        self.low_pass_filter_0.set_taps(firdes.low_pass(1, self.samp_rate, 75e3, 25e3, window.WIN_HAMMING, 6.76))
+        self.osmosdr_source_0.set_sample_rate(self.samp_rate)
+        self.qtgui_sink_x_0_0.set_frequency_range(self.channel_freq, self.samp_rate)
+
+    def get_channel_width(self):
+        return self.channel_width
+
+    def set_channel_width(self, channel_width):
+        self.channel_width = channel_width
+
+    def get_channel_freq(self):
+        return self.channel_freq
+
+    def set_channel_freq(self, channel_freq):
+        self.channel_freq = channel_freq
+        self.analog_sig_source_x_0.set_frequency((self.center_freq - self.channel_freq))
+        self.qtgui_sink_x_0_0.set_frequency_range(self.channel_freq, self.samp_rate)
+
+    def get_center_freq(self):
+        return self.center_freq
+
+    def set_center_freq(self, center_freq):
+        self.center_freq = center_freq
+        self.analog_sig_source_x_0.set_frequency((self.center_freq - self.channel_freq))
+        self.osmosdr_source_0.set_center_freq(self.center_freq, 0)
+
+
+
+
+def main(top_block_cls=ex1, options=None):
+
+    qapp = Qt.QApplication(sys.argv)
+
+    tb = top_block_cls()
+
+    tb.start()
+
+    tb.show()
+
+    def sig_handler(sig=None, frame=None):
+        tb.stop()
+        tb.wait()
+
+        Qt.QApplication.quit()
+
+    signal.signal(signal.SIGINT, sig_handler)
+    signal.signal(signal.SIGTERM, sig_handler)
+
+    timer = Qt.QTimer()
+    timer.start(500)
+    timer.timeout.connect(lambda: None)
+
+    qapp.exec_()
+
+if __name__ == '__main__':
+    main()