🎤🥁🎸 (Why??)Stem Separator Roadmap#422

• [Done]Deploy new sound separation engine: 4-stems, far more better than current Vocal Separator

• [Done]Stem Remix: separate and remix stems

• Video Sound Remixer #272

Add different instruments to it to, like guitar separation or piano seprration, drums and such and such. Moises has that.

yes, 5-stem and 6-stem support will release soon.

It’s finally here — starting with 6-stem splitting, with 4-stem and more coming soon. Quietly on-device, so you can do the fun part.

Where can l get it

Hi, Is it too hidden to place it as a top switch inside Vocal Separator (switching to Stem Separator)?

Based on app usage analytics, very few users are using this feature. Honestly, I don’t quite understand why—this is Demucs v4. Just one or two years ago you basically needed a PC with a dedicated GPU to run it.

Even on an iPhone 7 it can run (though it will be very slow), and the results are much better than the previous model.

I think it is too hidden. I think it should directly open into the stem separater, then on the top switch it to the vocal separator.

Can you add a feature, that I can select different instruments to be different types of files?

Also can you please make it that if you are connected to the internet it automatically separates using the web version; and also you should make it that when you start the separation, it will automatically also start on the on device module as well as on the internet version, so that if you get disconnected from the internet in middle of the separating, it will continue separating on the device.

Can you please make it possible to change from the waveform to volume sliders without it pausing?

Also please make it that on the page with the waveform you can play all tracks simultaneously?

If you select 4 stems you will be missing the other 2 instruments; But if you select the amount before you start the separation, the other instruments will be included in other.
So can you please change these things?

When I used the stem separator for the first time in the new version of the app it said “downloading basic model.” So is there an advanced model that I can download?

~~ “Is iPad 7 too old?” Yes, For the best experience, your device should be running iOS 18 or later with at least 4 GB of RAM. But from an engineering standpoint — making an iPad 7 run 6-stem separation on a $3.99 subscription, with output identical to what you get on an iPhone 17 Pro… trust me, that’s harder than achieving 10x hardware-accelerated separation on an iPhone 17 Pro. The trade-off is speed: 0.5x separation speed. A 5-minute song takes 10 minutes.

~~ “Can you add a feature, that I can select different instruments to be different types of files?” No, I think this is over-design. From the point of view of the delivery requirements, there is no such scenario. Separator does not need to be a perfect format converter at the same time.

~~ about “internet version”: No — even the most mediocre product can put stem separation behind a web service. But as far as I know, SoundLab is the only one that runs separation locally across everything from iPhone 7 to iPhone 17, with hardware acceleration on iOS 18 and above. Once you’ve used Separator as an effect, you’ll understand why local processing with no queue matters: you can separate ten clips of a dozen seconds each in under a minute. No queue, no connection, no limits. Wouldn’t you rather put the money you save on subscriptions toward a base-model iPad 10?

~~ about “…change from the waveform…”:
1 - The Stems mode and Mix mode after separation are designed for different purposes. For users who want to make a remix, automatically stopping playback from Stems mode when switching to Mix mode is intentional.

2 - If the Waveform view supported playing all tracks simultaneously, should it also support adjusting the volume of each track? If yes, then what would be the purpose of the Mix view? If not, users would need to switch to Mix view to adjust levels and then switch back again. In the end, users with either intention would need to understand the other workflow that they do not need, and both groups could feel confused.

3 - The 4-stem and 6-stem options can be understood as different separation processes. If you choose 4 stems, you get 4 stems; if you choose 6 stems, you get 6 stems. This is how the model works.

~~ about the “downloading basic model.”
The “downloading basic model” message refers to the model used to support devices running below iOS 18 or devices with less than 4 GB of memory. This model needs to be downloaded the first time separator is used. On these older or lower-memory devices, it is the only supported model available. So there is not an additional advanced model to download for that device.

“2 - If the Waveform view supported playing all tracks simultaneously, should it also support adjusting the volume of each track? If yes, then what would be the purpose of the Mix view? If not, users would need to switch to Mix view to adjust levels and then switch back again. In the end, users with either intention would need to understand the other workflow that they do not need, and both groups could feel confused.,,

Well it’s better that users with either intention would need to understand the other workflow that they do not need,then not having it at all. Also you can add it as a preference setting.

There are indeed some issues here, but discussing the interaction problem itself may not lead to the best solution. What may be needed is a better and more innovative design.

That said, I wouldn’t redesign it solely to solve this interaction issue, because there is still plenty of room to expand the functionality here. During that expansion process, I will also look for opportunities to innovate and improve the interaction design.

Thank you for your suggestion!

Thank you!