audio_feedback.launch

<?xml version="1.0"?>
<launch>
    <arg name="canvas_size_t" default="5" doc="the size(secs) of canvas for real time visualization of music note detection"/>
    <arg name="update_freq" default="5" doc="the frequency(Hz) to update the canvas, higher freq smaller delay"/>
    <group ns="audio_node">
      <node name="note_audio_capture" pkg="audio_capture" type="audio_capture" output="screen">
<!--           list the devices: arecord -l , and choose the id for [Scarlett 2i2 USB] device -->
          <param name="device" value="plughw:4,0" />
          <param name="format" value="wave" />
          <param name="channels" value="1" />
          <param name="depth" value="16" />
          <param name="sample_rate" value="44100" />
      </node>
      
      <node name="onset_detector" pkg="marimbabot_audio" type="onset_detection.py" output="screen">    
        <param name="~confidence_threshold" value="0.7"/>
        <param name="~amplitude_ref" value="25"/>
      </node>
      <node name="seq_eval" pkg="marimbabot_audio" type="sequence_evaluation.py" output="screen" />

      <node name="onsetviz" pkg="marimbabot_audio" type="onsets_visualization.py" output="screen" >
        <param name="~canvas_size_t" value="$(arg canvas_size_t)"/>
        <param name="~update_freq" value="$(arg update_freq)"/>
      </node>
      <node name="evalviz" pkg="marimbabot_audio" type="eval_visualization.py" output="screen" >
        <param name="~canvas_size_t" value="$(arg canvas_size_t)"/>
        <param name="~update_freq" value="$(arg update_freq)"/>
      </node>
    </group>

</launch>