Support audio devices with more than 2 channels

[probonopd]

Currently they don't even show up in the sound device selector. With this, they do. Tested with a BOSE Companion 5 (USB) but likely this will also work for USB audio interfaces with more than 2 channels.

Possibly the number should be increased even further, so that audio interfaces with even more channels would work.

References:

• Supporting audio devices with more than 2 channels gershwin-desktop/issues#5
• https://github.com/helloSystem/ISO/blob/906e988e558a09b6d5a02c809ff874068518f1f2/overlays/uzip/furybsd-settings/files/etc/sysctl.conf#L47-L49

[ghostbsd-bot]

Can one of the admins verify this patch?

[sourcery-ai]

Reviewer's Guide

Adds a sysctl configuration entry to enable USB audio devices with more than two channels by setting the default to six channels.

Flow diagram for audio device channel configuration update

flowchart TD
    A[Boot or sysctl reload] --> B[Read sysctl.conf]
    B --> C[Set hw.usb.uaudio.default_channels=6]
    C --> D[Audio subsystem allows devices with >2 channels]

Loading

File-Level Changes

Change	Details	Files
Enable support for USB audio devices with more than two channels	Added a comment clarifying the new multi-channel audio support Inserted hw.usb.uaudio.default_channels=6 setting	sbin/sysctl/sysctl.conf

---

Tips and commands

Interacting with Sourcery

• Trigger a new review: Comment @sourcery-ai review on the pull request.
• Continue discussions: Reply directly to Sourcery's review comments.
• Generate a GitHub issue from a review comment: Ask Sourcery to create an
  issue from a review comment by replying to it. You can also reply to a
  review comment with @sourcery-ai issue to create an issue from it.
• Generate a pull request title: Write @sourcery-ai anywhere in the pull
  request title to generate a title at any time. You can also comment
  @sourcery-ai title on the pull request to (re-)generate the title at any time.
• Generate a pull request summary: Write @sourcery-ai summary anywhere in
  the pull request body to generate a PR summary at any time exactly where you
  want it. You can also comment @sourcery-ai summary on the pull request to
  (re-)generate the summary at any time.
• Generate reviewer's guide: Comment @sourcery-ai guide on the pull
  request to (re-)generate the reviewer's guide at any time.
• Resolve all Sourcery comments: Comment @sourcery-ai resolve on the
  pull request to resolve all Sourcery comments. Useful if you've already
  addressed all the comments and don't want to see them anymore.
• Dismiss all Sourcery reviews: Comment @sourcery-ai dismiss on the pull
  request to dismiss all existing Sourcery reviews. Especially useful if you
  want to start fresh with a new review - don't forget to comment
  @sourcery-ai review to trigger a new review!

Customizing Your Experience

Access your dashboard to:

• Enable or disable review features such as the Sourcery-generated pull request
  summary, the reviewer's guide, and others.
• Change the review language.
• Add, remove or edit custom review instructions.
• Adjust other review settings.

Getting Help

• Contact our support team for questions or feedback.
• Visit our documentation for detailed guides and information.
• Keep in touch with the Sourcery team by following us on X/Twitter, LinkedIn or GitHub.

[github-actions]

Thank you for taking the time to contribute to FreeBSD!
There are a few issues that need to be fixed:

• Missing Signed-off-by lines^e74d0a7
• Real email address is needed^e74d0a7

[ericbsd]

LGTM

[probonopd]

The build error looks unrelated to this PR.

[ericbsd]

Most of these are FreeBSD-related, nothing to worry about.

[probonopd]

Thank you very much @ericbsd

[ericbsd]

@probonopd are you planning to backport to releng/14.3?

[probonopd]

I can submit PR(s) for releng/14.3. Do you prefer two separate PRs for

• Automatic sound switching #369
• Support audio devices with more than 2 channels #370

or one combined one?

[ericbsd]

I can submit PR(s) for releng/14.3. Do you prefer two separate PRs for

* [Automatic sound switching #369](https://github.com/ghostbsd/ghostbsd-src/pull/369)

* [Support audio devices with more than 2 channels #370](https://github.com/ghostbsd/ghostbsd-src/pull/370)

or one combined one?

One PR is fine.