Well there is but I don't know if I'd trust it, frankly. Periodic Calendar. Open source and licensed under the GPLv3. Thing is I don't think it's maintained anymore; the most recent version was released 7 years ago, and the most recent copyright date I've found was from 2013. Source: about 2 years ago

I also worked for 8 months on a music discovery webapp called Noiseblend that uses Spotify. We were never accepted for their commercial program and were not allowed to ask for money on the website. Source: about 1 year ago

My most ambitious web project was https://noiseblend.com which is a web app for discovering music on Spotify. It’s a next.js + React slow and memory hungry mess [1] which could have been static HTML with some JS for the dynamic bits. Experience taught me to keep it simple nowadays, but I had to go through the Noiseblend mistakes first. The stack is Python with Sanic for the backend, Postgres for db and Redis for... - Source: Hacker News / over 1 year ago

I’m serving everything from the Spotify API directly on Noiseblend (https://noiseblend.com) and rate limit has never been a problem. When a request fails because of a rate limit, Spotify responds with 429 and a Retry-After header so you know when to schedule the next request. In my tests, that header never had a value greater than 10 seconds, and 429 responses were very rare. - Source: Hacker News / over 2 years ago

I've been using this site ever since I discovered it! I'm glad to see it featured on HN. I started learning to play the Romanian Kaval [1] last summer and Songdata helped me enormously in finding good backing tracks to improvise on. I'm mostly improvising on chillhop tracks right now because I'm trying to develop less traditional rhythms (although I'm still clumsy with the breathing and knowing when to keep the... - Source: Hacker News / over 2 years ago