Focusrite Scarlett 2nd and 3rd Gen standalone mode

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geoffrey
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Focusrite Scarlett 2nd and 3rd Gen standalone mode

Post by geoffrey »

The Scarlett interfaces that have internal mixers (2nd Gen 6i6, 18i8, 18i20 and 3rd Gen 4i4, 8i6, 18i8, 18i20) have a "standalone" mode which lets you use the interface as a standalone mixer, not connected to a PC. When trying to do this I discovered that the interfaces have an internal switch to enable/disable this mode and it ships with it disabled. The MAC/Windows driver enables standalone mode automatically but the Linux driver does not.

As that's an unacceptable state of affairs, I present to you: https://github.com/geoffreybennett/scar ... v5.15.12s1
This release adds support for enabling/disabling the "standalone" mode of the Gen 2/3 Scarlett interfaces which have internal mixers (4i4 and above). When standalone mode is enabled, the interface will continue to pass audio even if not connected to a USB host.
In alsamixer you should find the setting nearby "Sync Status". Don't forget that alsamixer wants you to press "M" to toggle any playback switch controls (like this one).

If you can test, please do. Not just this new feature, but make sure I didn't break anything else as I refactored things. Once I get a couple of thumbs up then I'll submit it for inclusion in mainline.
seahorse
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Re: Focusrite Scarlett 2nd and 3rd Gen standalone mode

Post by seahorse »

hi geoffrey,
I have installed AVL since a few months . Last night I installed the liquorix 5.15-14.1~buster Kernel, because I get that tip from the AVL-Forum. Now my question here : are there the same capabilities in this kernel as in your 5.15 kernel.
I bought the Focusrite Scarlett 4i4 8 months ago. But unfortunately I could not use the device until today due to a lack of drivers.

However, after installing this liquorix kernel, I can now see that I report the Scarlett 4i4 directly.
With lsusb I get the following:
Bus 002 Device 002: ID 1235:8212 Focusrite Novation Scarlett 4i4 USB

That was not the case until yesterday. Nothing was shown to me. However, I can only see in alsamixer that the device is recognized. But I don't see a 'Sync Status' yet. That's why I can't press an 'M'.

Hence the question:
are there differences between your kernel and the liquorix kernel?
Or can these settings be made via parameters? e.g. via a start script?

Unfortunately, I'm not at all versed in kernel things. It's been way too long.

Hope you can help me there? I would be really happy anyway and would be grateful for any help

Many greetings
wolftune
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Re: Focusrite Scarlett 2nd and 3rd Gen standalone mode

Post by wolftune »

Don't want to derail this thread, but I installed the updated kernel, and now I have times where audio output just stops, no sound until I restart my 18i8 3rd Gen. With the prior release of your kernel (though somehow I got a low-latency kernel, so maybe that was from another source), I did not have this problem.
Aaron Wolf
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wolftune
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Re: Focusrite Scarlett 2nd and 3rd Gen standalone mode

Post by wolftune »

EDIT: Nevermind about my claim that the kernel was at fault for losing audio output on the 18i8. I now got the problem again despite reverting to 5.14

I think it's a TLP issue or something
Aaron Wolf
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