options:
  parameters:
    author: GNU Radio
    catch_exceptions: 'True'
    category: '[GRC Hier Blocks]'
    cmake_opt: ''
    comment: ''
    copyright: ''
    description: RTL-SDR FM Radio Receiver with frequency and volume controls
    gen_cmake: 'On'
    gen_linking: dynamic
    generate_options: qt_gui
    hier_block_src_path: '.:'
    id: default
    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 Receiver
    window_size: 1280, 1024
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [8, 8]
    rotation: 0
    state: enabled

blocks:
- name: samp_rate
  id: variable
  parameters:
    comment: ''
    value: '2400000'
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [200, 12]
    rotation: 0
    state: enabled
- name: variable_qtgui_range_0
  id: variable_qtgui_range
  parameters:
    comment: ''
    gui_hint: ''
    label: Frequency
    min_len: '200'
    orient: QtCore.Qt.Horizontal
    rangeType: float
    start: '87500000'
    step: '100000'
    stop: '108000000'
    value: '95500000'
    widget: counter_slider
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    state: enabled
- name: variable_qtgui_range_1
  id: variable_qtgui_range
  parameters:
    comment: ''
    gui_hint: ''
    label: Volume
    min_len: '200'
    orient: QtCore.Qt.Horizontal
    rangeType: float
    start: '0'
    step: '0.1'
    stop: '2'
    value: '1'
    widget: slider
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    state: enabled
- name: analog_wfm_rcv_0
  id: analog_wfm_rcv
  parameters:
    affinity: ''
    alias: ''
    audio_decimation: '10'
    comment: ''
    maxoutbuf: '0'
    minoutbuf: '0'
    quad_rate: '480000'
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    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
    state: enabled
- name: blocks_multiply_const_vxx_0
  id: blocks_multiply_const_vxx
  parameters:
    affinity: ''
    alias: ''
    comment: ''
    const: variable_qtgui_range_1
    maxoutbuf: '0'
    minoutbuf: '0'
    type: float
    vlen: '1'
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    state: enabled
- name: low_pass_filter_0
  id: low_pass_filter
  parameters:
    affinity: ''
    alias: ''
    beta: '6.76'
    comment: ''
    cutoff_freq: '100000'
    decim: '5'
    gain: '1'
    interp: '1'
    maxoutbuf: '0'
    minoutbuf: '0'
    samp_rate: '2400000'
    type: fir_filter_ccf
    width: '30000'
    win: window.WIN_HAMMING
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    state: enabled
- name: qtgui_freq_sink_x_0
  id: qtgui_freq_sink_x
  parameters:
    affinity: ''
    alias: ''
    alpha1: '1.0'
    alpha10: '1.0'
    alpha2: '1.0'
    alpha3: '1.0'
    alpha4: '1.0'
    alpha5: '1.0'
    alpha6: '1.0'
    alpha7: '1.0'
    alpha8: '1.0'
    alpha9: '1.0'
    autoscale: 'False'
    average: '1.0'
    axislabels: 'True'
    bw: '2400000'
    color1: '"blue"'
    color10: '"dark blue"'
    color2: '"red"'
    color3: '"green"'
    color4: '"black"'
    color5: '"cyan"'
    color6: '"magenta"'
    color7: '"yellow"'
    color8: '"dark red"'
    color9: '"dark green"'
    comment: ''
    ctrlpanel: 'False'
    fc: variable_qtgui_range_0
    fftsize: '1024'
    freqhalf: 'True'
    grid: 'False'
    gui_hint: ''
    label: Relative Gain
    label1: ''
    label10: ''''''
    label2: ''''''
    label3: ''''''
    label4: ''''''
    label5: ''''''
    label6: ''''''
    label7: ''''''
    label8: ''''''
    label9: ''''''
    legend: 'True'
    maxoutbuf: '0'
    minoutbuf: '0'
    name: RF Spectrum
    nconnections: '1'
    norm_window: 'False'
    showports: 'False'
    tr_chan: '0'
    tr_level: '0.0'
    tr_mode: qtgui.TRIG_MODE_FREE
    tr_tag: '""'
    type: complex
    units: dB
    update_time: '0.10'
    width1: '1'
    width10: '1'
    width2: '1'
    width3: '1'
    width4: '1'
    width5: '1'
    width6: '1'
    width7: '1'
    width8: '1'
    width9: '1'
    wintype: window.WIN_BLACKMAN_hARRIS
    ymax: '10'
    ymin: '-140'
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    state: enabled
- name: soapy_rtlsdr_source_0
  id: soapy_rtlsdr_source
  parameters:
    affinity: ''
    agc: 'True'
    alias: ''
    bias: 'False'
    bufflen: '16384'
    center_freq: variable_qtgui_range_0
    comment: ''
    dev_args: ''
    freq_correction: '0'
    gain: '20'
    maxoutbuf: '0'
    minoutbuf: '0'
    samp_rate: '2400000'
    type: fc32
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    state: enabled

connections:
- [analog_wfm_rcv_0, '0', blocks_multiply_const_vxx_0, '0']
- [blocks_multiply_const_vxx_0, '0', audio_sink_0, '0']
- [low_pass_filter_0, '0', analog_wfm_rcv_0, '0']
- [soapy_rtlsdr_source_0, '0', low_pass_filter_0, '0']
- [soapy_rtlsdr_source_0, '0', qtgui_freq_sink_x_0, '0']

metadata:
  file_format: 1
  grc_version: 3.10.12.0