Deep musical control over the generation

MusicLang allows you to control the chord progression of your song. In this example :

• We constrain the model to generate a piano track with a dense monophonic melody

• We constrain the second bar of the bass track to use a quite high register

By using and modifying this example you will be able to add deep control over the music generated with musiclang

Check Control other musical elements to get the full list of available tags

import os
from maidi import MidiScore, instrument
import maidi.chords_symbols as cs
from maidi.integrations.api import MusicLangAPI

# Assuming MUSICLANG_API_KEY is set in the environment
MUSICLANG_API_KEY = os.getenv("MUSICLANG_API_KEY")

# Create a 4 bar template with the given instruments
score = MidiScore.from_empty(
    instruments=[instrument.PIANO, instrument.ACOUSTIC_BASS], nb_bars=5, ts=(4, 4), tempo=120
)
# Get the controls (the prompt) for this score
mask, tags, chords = score.get_empty_controls(prevent_silence=True)
mask[:, :] = 1  # Regenerate everything in the score

# Let control the tags
for i in range(mask.shape[1]):
    tags[0][i] = ['CONTROL_DENSITY__HIGH', 'CONTROL_MAX_POLYPHONY__1']

# Second bar of the bass track use a quite high register (like alto)
tags[1][1] = ['CONTROL_MIN_REGISTER__alto', 'CONTROL_MAX_REGISTER__alto']

# Call the musiclang API to predict the score
api = MusicLangAPI(api_key=MUSICLANG_API_KEY, verbose=True)
predicted_score = api.predict(score,
                              mask, tags=tags, chords=chords, async_mode=False, polling_interval=3
                              )
predicted_score.write("predicted_score.mid")