LRS-001 · A short film about silence

The zombie apocalypse started on a Tuesday.
You're alone in a forest, running. The zombies took out the cell towers on day one.
This should feel like a movie. It doesn't, and it takes you a minute to work out why.
There's no soundtrack. Just your breathing.
So you pull out your phone, open the studio and make one.
Run, run, run.

Localhost Recording Studio

Write a style and some lyrics. It makes the whole song on your own phone or computer, offline. Give it a recording and it sings a cover of the tune with your words.

Hear the song it made Get the app

LRS-000 · Side A

The ad

LRS-000 · Ad in production

LRS-RUN · Side B

"Run, run, run"

The soundtrack from the forest. The app made it, start to finish.

LRS-RUN Pressing pending

0:00 / 0:00

Title: Run, run, run
Made on: Localhost
Cell reception: None

The song is still being rendered. It will appear here when media/run-song.mp3 exists.

Liner notes

How it works

01 · Write
A style ("breathless synth chase, 140 bpm, panic") and lyrics with section tags like [Verse] and [Chorus]. For a cover, also pick a recording.
02 · Record
Pick SKETCH, STANDARD or FINAL. Each shows an estimate of how long it will take. Press record, queue a few variants if you like and put the phone back in your pocket.
03 · Render
The model runs on your phone or computer. Nothing is uploaded and you don't need an account. At standard and final quality, a preview plays a quarter of the way through, so you can decide whether to let it finish.
04 · Extend
Pick any section of a song you like and continue it from there. Extends can be chained. "Refine this mix" brings a sketch up to full quality and keeps its sound.

Engine, picked by hardware

Hardware	Engine
Apple Silicon Mac	MLX (mlx-Yue)
Linux PC	yue2.cpp on CUDA, Vulkan or CPU
Android phone	yue2.cpp, on the device

How long it takes

25 s song	about 23 s on a Mac M2 Max (MLX, 8-bit, 8 steps)
Extend +15 s	about 14 s, same Mac
On a phone	minutes for every 10 s of song. Slow, but it works. Let it run in the background.

These are the numbers we have measured. First run downloads the model: about 3.5 GB on Android, about 10.5 GB on a Mac. Covers have their own numbers, below.

Cover versions

Covers

Give it a recording. It sings the tune again in your style, with your words.

Pick a recording in the Cover row of the recording settings. The studio listens to it first and writes down its score: melody and chords (SCORE), or the melody alone (MELODY). Then it makes a new song from that score, in your style and with your lyrics. The cover keeps the tune. The original instruments and voice don't carry over.

The Style row sets how hard your style and words pull against the recording's tune, from 0.5 to 2.0. At 1.0, the default, both count evenly. Go higher for a stronger genre and clearer words, and the tune can drift further from the original. Go lower to stay closer to the recording. Any value other than 1.0 makes composing take about twice as long, and the time estimate includes that.

Runs on	Mac and Android, entirely on the device
Extra download	about 2.6 GB on a Mac, about 960 MB on a phone
30 s cover	about a minute on a Mac, sketch quality
20 s cover	about 20 minutes on a Pixel-class phone, sketch quality

Phone recording settings for a cover: quality presets with time estimates, the Cover row set to a recording, Keep set to SCORE with MELODY as the other choice, and Style at 1.3 with the note that your style and words pull harder than the recording. — Phone · cover settings

Plates

What it looks like

Desktop window: song index on the left with catalogue numbers LRS-012 to LRS-015, a large polar pulse plot in the middle, style and lyrics on the right and a Record LRS-016 button. — Desktop · the studio

Desktop song detail for LRS-014: play controls, export buttons, format FLAC 48 kHz stereo, seed, steps and the model licence YuE2-3B CC-BY-NC-4.0. — Desktop · song details

Phone screen with the polar plot of LRS-015, its style and lyrics, the colour code strip and a Record LRS-016 button. — Phone · idle

Phone screen while recording LRS-015, at 2:14 of 4:00, with a progress arc around the polar plot. — Phone · recording

Phone screen playing LRS-015 at 1:04 of 5:00, with a progress arc on the outer ring of the polar plot. — Phone · playing

Model setup screen: YuE2-3B by M-A-P, its CC BY-NC 4.0 licence with an accept checkbox, the MLX engine and a choice of weights. — Phone · model setup

Small print, large enough to read

Models and licences

The app

MIT

Free software. Fork it if you want to.

The model · YuE2-3B by M-A-P

CC BY-NC 4.0

The first supported model is non-commercial, with attribution to M-A-P. The app works with other models too, and each one brings its own licence. You see it and accept it before anything downloads, and every song remembers which model and licence made it.

Pressings

Get it

Android
Signed APK. arm64, Android 14 or newer.
Latest release
macOS
App bundle, Apple Silicon recommended. Not notarized yet, so right-click and Open the first time.
Latest release
Linux
Build from source with Flutter. The setup builds yue2.cpp for your GPU.
Build notes
Zapstore
Install and get updates through Zapstore, the open app store on nostr.
Zapstore

Source: github.com/jooray/studio-localhost. Free software under the MIT licence.