Remove sox (#4046)

Author: samanklesaria

CMakeLists.txt

@@ -166,10 +166,6 @@ else()
 endif()
 
 add_subdirectory(src/libtorchaudio)
-if (BUILD_SOX)
-  add_subdirectory(third_party/sox)
-  add_subdirectory(src/libtorchaudio/sox)
-endif()
 if (USE_FFMPEG)
   if (DEFINED ENV{FFMPEG_ROOT})
     add_subdirectory(third_party/ffmpeg/single)

docs/source/index.rst

@@ -102,7 +102,6 @@ model implementations and application components.
    models
    models.decoder
    pipelines
-   sox_effects
    compliance.kaldi
    kaldi_io
    utils

docs/source/installation.rst

@@ -70,27 +70,6 @@ Optional Dependencies
      files you installed follow this naming scheme, (and then make sure
      that they are in one of the directories listed in library search path.)
 
-* `SoX <https://sox.sourceforge.net/>`__
-
-  Required to use ``backend="sox"`` in `I/O functions <./torchaudio.html#i-o>`__.
-
-  Starting version 2.1, TorchAudio requires separately installed libsox.
-
-  If dynamic linking is causing an issue, you can set the environment variable
-  ``TORCHAUDIO_USE_SOX=0``, and TorchAudio won't use SoX.
-
-  .. note::
-
-     TorchAudio looks for a library file with unversioned name, that is ``libsox.so``
-     for Linux, and ``libsox.dylib`` for macOS. Some package managers install the library
-     file with different name. For example, aptitude on Ubuntu installs ``libsox.so.3``.
-     To have TorchAudio link against it, you can create a symbolic link to it with name
-     ``libsox.so`` (and put the symlink in a library search path).
-
-  .. note::
-     TorchAudio is tested on libsox 14.4.2. (And it is unlikely that other
-     versions would work.)
-
 * `SoundFile <https://pypi.org/project/PySoundFile/>`__
 
   Required to use ``backend="soundfile"`` in `I/O functions <./torchaudio.html#i-o>`__.

docs/source/sox_effects.rst

@@ -78,14 +78,6 @@ The following table summarizes the backends.
        to retrieve the supported codecs.
 
        This backend Supports various protocols, such as HTTPS and MP4, and file-like objects.
-   * - 2
-     - SoX
-     - Linux, macOS
-     - Use :py:func:`~torchaudio.utils.sox_utils.list_read_formats` and
-       :py:func:`~torchaudio.utils.sox_utils.list_write_formats`
-       to retrieve the supported codecs.
-
-       This backend does *not* support file-like objects.
    * - 3
      - SoundFile
      - Linux, macOS, Windows

docs/source/torchaudio.rst

@@ -189,8 +189,6 @@ def train(args):
     _LG.info("%s", args)
 
     args.save_dir.mkdir(parents=True, exist_ok=True)
-    if "sox_io" in torchaudio.list_audio_backends():
-        torchaudio.set_audio_backend("sox_io")
 
     start_epoch = 1
     if args.resume: