class_docstr: Aubio Pitch estimation analyzer
class_docstr_tok: ["Aubio","Pitch","estimation","analyzer"]
code: def unit():
      return "Hz"
  
imports: from __future__ import absolute_import
  from timeside.core import implements, interfacedoc
  from timeside.core.analyzer import Analyzer
  from timeside.core.api import IAnalyzer
  from timeside.core.preprocessors import downmix_to_mono, frames_adapter
  from aubio import pitch
  import numpy
  from timeside.plugins.analyzer.utils import nextpow2
  from timeside.core.tools.parameters import store_parameters, Float, HasTraits
  from timeside.core.grapher import DisplayAnalyzer
label_desc: Use image node_id 6 for calling the AubioPitch obj's underlying member method code with example usage: obj.unit() and returns: str