In what ways?
Personally, I don’t see a lot of risk to the potential privacy lost from using a music streaming service. I can’t think of any ways in which personal&private information would be exposed.
What are some of the specific things you find invasive or specific categories of information you want to protect?
or their free accounts are very bad (ex. Spotify). Some don’t offer free access
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Do you wish there was a FOSS, privacy respecting streaming service? One that end to end encrypts all pieces of data possible?
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Would you use such a software?
To me it seems like you may have a couple misconceptions:
1st, A streaming service, isn’t just a piece of software, its a service. This distinction is important because in contrast to a piece of software, services have much higher operational running costs. In the case of a music streaming service, whoever runs the service must pay to host and stream all that music, and must pay for the music itself. How would a “FOSS Privacy respecting streaming service” sustain itself if a paid/premium model and ads are off the table?
With software the only thing needed for a good FOSS alternative is someone with motivation, time, and skill to develop it and share it with the world. WIth a service you still need someone with motivation+skill+time, but you also need a way to pay for all the costs of running the service.
2nd, What would e2e encryption mean in the context of a music streaming service and why do you think it would be of value? The status quo is that if you play a song on Spotify, you know you’ve played that song and Spotify knows you played that song. If you e2e encrypted this connection, it would be the same, you would know you played the song and spotify would as well. E2EE isn’t a magic cure-all, it protects data between two endpoints, if you trust the other endpoint and don’t trust some outside 3rd party it may be the right tool for the job, but if either of these things is not true, its likely not going to be the right tool.
So that brings us back to the beginning of my comment, what specific things are you trying to protect and from whom? Answer these questions and the rest will become easier to address.