If you are strictly looking for a free, high-quality experience without ads, you may need to look at the landscape of online radio:

While DI.FM (Digitally Imported) does not offer a permanent "Premium" service for free, it provides several pathways for listeners to experience its high-quality, ad-free electronic music streams without an immediate financial commitment. The Value of DI.FM Premium

provides several high-end features designed for audiophiles and electronic music fans: Ad-Free Streaming

A listener-supported, free alternative with 30+ channels of niche electronic music. Frequently Asked Questions Can I use a DI.FM premium generator?