Full control of your sound.

Selah runs your guitar rig on the Mac, close to the audio hardware. Every block, lane and level is in front of you.

Mac appworking todayiPad, iPhoneremotes in designApple Watchlater

Scenario 01 · Sunday, 08:40
Mockup built from the app’s design spec

Open CheckRun it over the setRead the verdicts

Find the missing plugin before the band does.

Check opens every rig in the set and says what it would be missing, without starting the engine or touching what is playing.

Scenario 02 · Sunday, 10:15
Mockup built from the app’s design spec

Add a blockOpen a laneOpen the block face

Build the rig you hear in your head.

Add a block, open a lane, and the engine lines the two paths up for you. Every block opens to a face made from its own parameters.

Scenario 03 · Sunday, 10:50
Mockup built from the app’s design spec

Open the key listPick a keyEqual-power crossfade

Change the key. The pad follows.

Twelve keys, major and minor, four stems each. The old key fades as the new one rises, at equal power, so the level holds.

Scenario 04 · Sunday, 11:20
Design mockup. The remote apps are not built yet

Change sceneNext songLose the linkCome back

Run the stage from where you stand.

An iPad on the stand, a phone in your pocket, a watch on your wrist later. They are remotes: the Mac makes the sound, and if the link drops the music keeps going.

The numbers
Measured, not claimed

1,333µs

One audio cycle.

At 48 kHz and a 64-frame buffer, everything Selah does for one cycle has to finish inside this.

1,333 µs

2.77µs

What the sandbox costs.

Plugins run in their own process, so one crash cannot take the engine down. That isolation costs this much of each cycle, at p99, on a reverb.

AUReverb2 · range 1.46–5.38 · n = 10 · 0.10% of the budget

drawn to scale against 1,333 µs

15of 15

Plugin helpers killed, engine untouched.

The helper process was killed outright fifteen times. The engine kept running every time, with 0 overruns.

0.11ms

Apply a live edit.

A reconciled edit takes 0.11 ms at the median. A full rebuild takes 1.20 ms. On a real reverb rig the change went from 416 ms to 0.7 ms.

n = 11

FULL REBUILD · 1.20 ms

RECONCILED EDIT · 0.11 ms

One Mac with an M1 Pro, one interface, one macOS build. Not reproduced on other setups, and there is no listening test. Every figure comes from the project’s own ledger of measurements.

What is next
A concept, not built yet

Capture your amp. Load it as a block.

A native capture block is next, starting with open formats such as NAM. This is how it is meant to feel, and it is not built yet.

What works, what is next.

Selah is in active development. This is where each part stands.

Working on the Mac

Rig, Mixer and Router
Perform and Setlist
Library and Check
Setup, with the buffer as a real selector
Audio Unit and impulse-response hosting
Pads, tuner, click and master fader

In design or being built

iPad and iPhone remotes
Map, Panel and Store surfaces
The control protocol is built and tested

Planned

Native capture block
Apple Watch remote