Hobbyist builds infinite AI music with Nvidia DGX Spark and Ace-Step 1.5 XL

A Reddit user identified as entsnack has shared a detailed self-hosted AI music pipeline that completely replaces paid streaming subscriptions. The hardware backbone consists of two Nvidia DGX Spark units connected via Mellanox ConnectX 7 networking, running Plex Media Server alongside multiple instances of Ace-Step 1.5 XL—a music generation model optimized for prompt-driven composition. Prompt engineering is handled by GePa, a tool that optimizes inputs for higher quality outputs. The system also ingests the user's own organic music library, allowing the models to remix and blend existing tracks. Future plans include adding a reinforcement learning from human feedback (RLHF) interface to fine-tune generated music based on personal taste.

The setup produces an effectively infinite catalog of music tailored specifically to the user's preferences, all without recurring subscription fees. Playback is handled via an iPad Pro running Prism as a Plex client for bit-perfect, sample-rate-matched audio, feeding into a Schiit stack amplifier and Hifiman Arya Stealth headphones. The user notes a unique trade-off: while the music is endlessly fresh and personalized (citing examples like 'Shrimp Bizkit' and 'Phlegminem'), they miss the community aspect of sharing and discovering songs with others. This highlights a broader tension in AI-generated content — hyper-personalization versus social discovery.