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Demon

open-source real-time music diffusion engine, 25Hz local GPU

Details

External ID
48296503
Source
HN
Company
—
Product
Demon
Website domain
github.io
Launched
May 27, 2026
Cohort
—
Upvotes
17
Upvotes percentile
0.7140549273021002
Tags
—
Fetched at
Sept. 7, 2026, 9:26 p.m.
Updated at
Sept. 7, 2026, 9:26 p.m.

Description

YO,I’m Ryan, lead author. I’ve been contributing open source generative audio stuff for a while now, audio reactive Comfy nodes, extended ACEstep support in Comfy, etc.. I just opened-sourced a new audio project that I've been working on for a few months and I want to tell y'all about it.WHAT IS IS DEMON: Diffusion Engine for Musical Orchestrated NoiseThis is StreamDiffusion but with audio instead of images, and ACEStep 1.5 instead of Stable Diffusion. It’s responsive enough that you can play it like an instrument, and remix in near real-time.I also distilled the ACEStep VAE: it’s faster at the expense of some quality.I also trained something like 200 lora/dora for ACEStep 1.5 and 1.5XL: I will release these in batches of 5 or 10 or somethingWHY IT IS Two reasons: 1) Making music is an inherently real-time activity 2) Why not broSOME RUNTIME CAPABILITIES -Real-time remixing of songs -Denoise, structure, timbre strength adjustment -Reference track swapping -Prompt blending, parameter scheduling with curves -LoRA hotswapping, runtime strength adjustment -Latent channel (research preview) -Feedback -Vocal stem cutting/pasting with melformer (s/o u/BuffMcBigHuge) -XL support (its less stable, working out VRAM pressure issues and whatnot) -Lyrics/vocals SOON -Spectral quality SOON -Other stuffSOME LIMITATIONS -ACEStep (correctly) ‘begins’ and ‘ends’ the song. This system is optimized for remixing either an entire song, or continuously remixing a loop. The loop works fine, but this is not pure, continuous music. Autogression wins here. -Many others, for a more exhaustive list, please see the full writeup via the project page -Please let us know if you find any, I would love to try and address them if possibleLINKS My YouTube (DEMON tutorial): https://youtu.be/FBv1b5gmjcE Github: https://github.com/daydreamlive/DEMON Project page: https://daydreamlive.github.io/DEMON LoRA: https://civitai.com/models/2416425/acestep-loras DreamVAE: https://huggingface.co/daydreamlive/DreamVAE Try it w/o installing: https://music.daydream.live

Enrichment

Theme
audio and music production tools
Vertical
Media & entertainment
Function
Content generation
Audience
Developer
AI stance
AI-native
Project type
Hobby / open-source project
Normalized one-liner
local real-time music generation
Manually corrected
False

Could you build this?

No Achieving real-time 25Hz streaming diffusion audio generation with live LoRA hot-swapping via custom TensorRT engines requires world-class deep learning systems engineering and generative audio research.

What it would actually take: The engine requires optimizing diffusion models (like ACE-Step) into low-latency TensorRT execution graphs, designing custom ring-buffered pipelined ODE/SDE solvers, and implementing live TensorRT engine refitting for dynamic LoRA weights. Building this demands elite machine learning infrastructure engineers experienced in GPU memory management, CUDA kernels, and real-time generative audio modeling.

Discussion

13 comments analyzed.

Competitors mentioned: Magenta, Lyria

Concerns raised: Cannot generate music forever/continuously like Magenta, High parameter update latency compared to real-time needs

Feature requests: VST support

Competitors

Other products that read as similar to this one — 191 launches clear the similarity bar, closest 8 shown.

Attention rank: #71 of 192 (itself plus its competitors, highest first — normalized so YC and Product Hunt are compared fairly).

Launched 210 days after the earliest competitor.

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