Realbook is a Python library for easier training of audio deep learning models with Tensorflow made by Spotify's Spotify's Audio Intelligence Lab. Realbook provides callbacks (e.g., spectrogram visualization) and well-tested Keras layers (e.g., STFT, ISTFT, magnitude spectrogram) that we often use when training. These functions have helped standardized consistency across all of our models we and hope realbook will do the same for the open source community. Below are a few highlights of what we have written so far. Let's use realbook to train a binary classifier that takes in audio, converts the audio to a spectrogram and then runs the spectorgram output through two trainable Dense layers.