Rational Resampler Demo

Adapted from GNU Radio's own example (gr-filter/examples/resampler_demo.grc). The QT GUI Label variables become plain variables so their values survive.
Category Filters
Blocks 12
Connections 6
File filter/resampler.grc
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Blocks used

Block	Module	Used
Variable	`GNU Radio`	5
QT GUI Frequency Sink	`GNU Radio`	2
Add Const	`GNU Radio`	1
Frequency Mod	`GNU Radio`	1
Polyphase Arbitrary Resampler	`GNU Radio`	1
Signal Source	`GNU Radio`	1
Throttle	`GNU Radio`	1
Flowgraph source

filter/resampler.grc
options:
  parameters:
    author: ''
    catch_exceptions: 'True'
    category: Custom
    cmake_opt: ''
    comment: ''
    copyright: ''
    description: Adapted from GNU Radio's own example (gr-filter/examples/resampler_demo.grc). The QT GUI Label variables
      become plain variables so their values survive.
    gen_cmake: 'On'
    gen_linking: dynamic
    generate_options: qt_gui
    hier_block_src_path: '.:'
    id: resampler_demo
    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: Rational Resampler Demo
    window_size: 1280, 1024
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [10, 10]
    rotation: 0
    state: enabled
blocks:
- name: frac_bw
  id: variable
  parameters:
    comment: ''
    value: '.45'
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [590, 10]
    rotation: 0
    state: enabled
- name: new_rate
  id: variable
  parameters:
    comment: ''
    value: '48000'
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [760, 10]
    rotation: 0
    state: enabled
- name: nphases
  id: variable
  parameters:
    comment: ''
    value: '32'
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [930, 10]
    rotation: 0
    state: enabled
- name: rs_taps
  id: variable
  parameters:
    comment: ''
    value: firdes.low_pass(nphases, nphases, frac_bw, 0.5-frac_bw)
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [1100, 10]
    rotation: 0
    state: enabled
- name: samp_rate
  id: variable
  parameters:
    comment: ''
    value: '44100'
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [1400, 10]
    rotation: 0
    state: enabled
- name: adder
  id: blocks_add_const_vxx
  parameters:
    affinity: ''
    alias: ''
    comment: ''
    const: '-1.0'
    maxoutbuf: '0'
    minoutbuf: '0'
    type: float
    vlen: '1'
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [310, 210]
    rotation: 0
    state: enabled
- name: analog_frequency_modulator_fc_0
  id: analog_frequency_modulator_fc
  parameters:
    affinity: ''
    alias: ''
    comment: ''
    maxoutbuf: '0'
    minoutbuf: '0'
    sensitivity: math.pi
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [890, 210]
    rotation: 0
    state: enabled
- name: analog_sig_source_x_0
  id: analog_sig_source_x
  parameters:
    affinity: ''
    alias: ''
    comment: ''
    maxoutbuf: '0'
    minoutbuf: '0'
    offset: '0'
    phase: '0'
    samp_rate: samp_rate
    showports: 'False'
    type: float
    waveform: analog.GR_TRI_WAVE
    frequency: '0.05'
    amplitude: '2'
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [10, 190]
    rotation: 0
    state: enabled
- name: blocks_throttle2_0
  id: blocks_throttle2
  parameters:
    affinity: ''
    alias: ''
    comment: ''
    ignoretag: 'True'
    limit: auto
    maximum: '0.1'
    maxoutbuf: '0'
    minoutbuf: '0'
    samples_per_second: samp_rate
    type: float
    vlen: '1'
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [560, 190]
    rotation: 0
    state: enabled
- name: pfb_arb_resampler_xxx_0
  id: pfb_arb_resampler_xxx
  parameters:
    affinity: ''
    alias: ''
    atten: '100'
    comment: ''
    maxoutbuf: '0'
    minoutbuf: '0'
    nfilts: nphases
    rrate: float(new_rate)/samp_rate
    samp_delay: '0'
    taps: rs_taps
    type: ccf
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [1260, 190]
    rotation: 0
    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'
    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: '0'
    fftsize: '1024'
    freqhalf: 'True'
    grid: 'False'
    gui_hint: 1,0,1,3
    label: Relative Gain
    label1: Original Spectrum
    label10: ''
    label2: Resampled Spectrum
    label3: ''
    label4: ''
    label5: ''
    label6: ''
    label7: ''
    label8: ''
    label9: ''
    legend: 'False'
    maxoutbuf: '0'
    minoutbuf: '0'
    name: Original Spectrum
    nconnections: '1'
    norm_window: 'False'
    showports: 'True'
    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'
    samp_rate: samp_rate
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [1260, 330]
    rotation: 0
    state: enabled
- name: qtgui_freq_sink_x_0_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'
    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: '0'
    fftsize: '1024'
    freqhalf: 'True'
    grid: 'False'
    gui_hint: 2,0,1,3
    label: Relative Gain
    label1: Resampled Spectrum
    label10: ''
    label2: Resampled Spectrum
    label3: ''
    label4: ''
    label5: ''
    label6: ''
    label7: ''
    label8: ''
    label9: ''
    legend: 'False'
    maxoutbuf: '0'
    minoutbuf: '0'
    name: Resampled Spectrum
    nconnections: '1'
    norm_window: 'False'
    showports: 'True'
    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'
    samp_rate: new_rate
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [80, 510]
    rotation: 0
    state: enabled
connections:
- [adder, '0', blocks_throttle2_0, '0']
- [analog_frequency_modulator_fc_0, '0', pfb_arb_resampler_xxx_0, '0']
- [analog_frequency_modulator_fc_0, '0', qtgui_freq_sink_x_0, '0']
- [analog_sig_source_x_0, '0', adder, '0']
- [blocks_throttle2_0, '0', analog_frequency_modulator_fc_0, '0']
- [pfb_arb_resampler_xxx_0, '0', qtgui_freq_sink_x_0_0, '0']
metadata:
  file_format: 1
  grc_version: 3.10.10.0