magenta_setup.md

Introduction to Magenta

We’re happy to announce Magenta, a project from the Google Brain team that asks: Can we use machine learning to create compelling art and music? If so, how? If not, why not?

• Blog Post
• Git Repo
• Discussion Group

Steps to setup Magenta

Clone the repo

git clone git@github.com:tensorflow/magenta.git --recursive
cd magenta

The --recursive flag automatically initializes and updates each submodule in the repository. More info on git submodules

Configure tensorflow

I just went w/ the default options.

cd tensorflow
./configure
cd ..

Build the project(s)

These are found in magenta/BUILD.

bazel build //magenta:music_py_pb3
# Generates bazel-genfiles/magenta/protobuf/music_pb2.py

bazel build //magenta:music_proto
# Generates
#  * bazel-bin/magenta/*
#  * bazel-genfiles/magenta/protobuf/music.pb.cc
#  * bazel-genfiles/magenta/protobuf/music.pb.h

bazel build //magenta:midi_io_test
bazel build //magenta:midi_io

music_pb2.py

music_pb2.py is a python protocol buffer which was compiled from magenta/protobuf/music.proto.

// A message containing a symbolic music sequence. The design is largely based on MIDI but it should be able to represent any music sequence.

As such I don't think we run it directly from the command line. Instead I believe that we import it and use it as an interface in our code.

magenta/lib

I think that this is the sample code which we are supposed to run. However when I run python magenta/lib/midi_io_test.py I get

Traceback (most recent call last):
  File "magenta/lib/midi_io_test.py", line 8, in <module>
    import google3
ImportError: No module named google3

I'm unable to install google3 via pip:

$ pip install google3                                                                                                     
Collecting google3
  Could not find a version that satisfies the requirement google3 (from versions: )
No matching distribution found for google3

I've googled around and I don't see a python package called google3 so I'm still trying to debug this.

Also when I run

$ python magenta/lib/midi_io.py                                                                                             
Traceback (most recent call last):
  File "magenta/lib/midi_io.py", line 10, in <module>
    import pretty_midi
ImportError: No module named pretty_midi

There is a pretty_midi package in the third_party directory which is used in the compilation step above so I'm unclear what's happening here.