AIVA is described as 'Aiva is an Artificial Intelligence (A.I.) capable of composing emotional soundtracks for films, video games, commercials and any type of entertainment content. Create compelling themes for your projects faster than ever before, by leveraging the power of AI-generated music' and is an website in the Audio & Music category. There are more than 10 alternatives to AIVA, not only websites but also apps for a variety of platforms, including Windows, iPhone, iPad and Self-Hosted solutions. The best alternative is WolframTones, which is free. Other great sites and apps similar to AIVA are Abundant Music (Free, Open Source), TrebleMaker (Free, Open Source), Amper Music (Paid) and ecrett music (Paid).
TrebleMaker.ai procedurally generates royalty-free MIDI files compatible with any DAW. Just visit the site and it auto-generates a MIDI song you can download as a zipped .tar file and even check it out live using the Play icon.
WaveBots Editor provides a powerful but intuitive way to procedurally create music and sound effects, mainly for use in retro-style videogames. The editor can export to a wide array of formats from the typical Wav, Mp3 and MIDI formats to GoatTracker, Pico-8, Tico-8 and more.
Mixtikl is one of the deepest and most powerful generative music apps out there and it lets you create magical generative music mixes that you can interact with, add audio loops to and generally customize to your hearts content (e.g.
Sharp11 is an npm module for performing music theory operations, ranging from simple things like transposing a note to complicated things like generating an ordered list of scales that can be played over a given chord.