docstr: `info` can check wav file with channels more than 2 correctly
code: def test_wav_multiple_channels(
      self, dtype, sample_rate, num_channels
  ):
      """`info` can check wav file with channels more than 2 correctly"""
      duration = 1
      path = self.get_temp_path("data.wav")
      data = get_wav_data(
          dtype,
          num_channels,
          normalize=False,
          num_frames=duration * sample_rate,
      )
      save_wav(path, data, sample_rate)
      info = self._info(path)
      assert info.sample_rate == sample_rate
      assert info.num_frames == sample_rate * duration
      assert info.num_channels == num_channels
      assert info.bits_per_sample == sox_utils.get_bit_depth(dtype)
      assert info.encoding == get_encoding("wav", dtype)
  
imports: import io
  import itertools
  import os
  import pathlib
  import tarfile
  from contextlib import contextmanager
  from functools import partial
  from parameterized import parameterized
  from torchaudio._backend.utils import get_info_func
  from torchaudio._internal import module_utils
  from torchaudio.utils.sox_utils import get_buffer_size, set_buffer_size
  from torchaudio_unittest.backend.common import get_bits_per_sample, get_encoding
  from torchaudio_unittest.backend.dispatcher.sox.common import name_func
  from torchaudio_unittest.common_utils import get_asset_path, get_wav_data, HttpServerMixin, PytorchTestCase, save_wav, skipIfNoExec, skipIfNoFFmpeg, skipIfNoModule, sox_utils, TempDirMixin
label_desc: Use image node_id 3 for calling the TestInfo obj's underlying member method code with example usage: obj.test_wav_multiple_channels(dtype, sample_rate, num_channels) without return types