macos – How to adjust master volume for an output device?

I’m using a DAC (AudioQuest DragonFly) which has a very loud master volume when combined with headphones. It is not possible to adjust the volume on the device itself.

Therefore I can only use the first three notches on the audio volume, everything else is too loud (I know I can use together with the volume buttons to get 1/4 of the volume adjustments, but I’d rather just use the volume buttons as is because that’s where my muscle memory is).

Is it possible to adjust the master volume of an output device in macOS so that I can use the full range of volume adjustment when using the volume keys? If so, how can I achieve this?

accessibility – Patterns for adjusting settings which may hinder the user’s ability to adjust that same setting again

This question is about those self-referential settings where the ability of the user to control a device, say:

  • using a mouse cursor, or
  • viewing it on a monitor screen

is itself affected by the setting they’re changing:

  • adjusting the mouse speed, or
  • configuring monitor settings

Consider these predicaments:

  • The user sets their mouse speed too fast that they can’t click anything in order to set the setting back to slow.
  • The user positions their multiple monitors in such a way they can no longer find the window or their cursor so they can’t undo the change.

This class of problem is particularly prevalent in the context of assistive devices, where the user’s interface to a device is inherently limited to begin with.

One UX pattern I’ve seen that addresses this is to apply the change and then start a countdown (say, 10 seconds) that will revert the change when the countdown reaches 0. That is, unless during this countdown phase the user is able to click a certain button, proving that the change is acceptable and they are not in a predicament as described above. Ubuntu uses this UX strategy for monitor and display settings, but I have not come across a name for it.

My question is: Are there other UX strategies for dealing with these self-referential settings which risk putting the user in a pinch?

And have people found the UX pattern described above to be successful, or flawed?

(In case it’s helpful to state, my current concern is indeed an assistive device, and mouse speed is the setting on top of mind.)

Adjust path for iTunes / Music files after files move

I moved all my music library to a network drive. So now all my library is messed up as Music (former iTunes) can not find the files. I have to manually set the path for each file I want to play (~3500) files. I tried to grep -r '/Volumes/S_Drive/Music/Music/' to see which file I could replace the paths in my home but it came up with nothing. So guess the music library is saved somewhere else. I would like to run this in one step instead of having to adjust paths manually every time. Cheers, EL

MacOS 11.2.3

big sur – Adjust the opacity/transparency of an image on Mac OS Big Sur

I thought i’d be able to do this with the built-in Preview app, but I can’t find a way to do that.

I have an image i’d like to reduce the opacity to 50%.

Can anyone advise if there’s a way to do this with built-in applications that come with MacOS or if this needs GIMP or another image editing tool? I’d rather not install GIMP (if I can avoid it) just for this.

amd graphics – HP laptop with R75800U can’t adjust display brightness in ubuntu18.04

I used HP laptop with AMD R7-5800U. And I can’t adjust display brightness in ubuntu18.04 with kernel 5.4 or 5.10.3. I also tried other solutions, including adjust the brightness in “/sys/class/backlight”. And in this path, there is a folder named as “api_video0”. When I change the brightness from settings, the brightness in this path is changed while the screen brightness didn’t change at all.

How do I create a list of ranked numbers in Sheets––one that will adjust if I change a number?

I have a column of numbers 1-50 in a Google Sheet, which are a ranking list for a different column of fifty items (items are ranked relative to one another, so 1 is the best in the list and 50 is the worst; there are no repeats). I want to create a formula that will automatically adjust the list if I change the ranking of an item. For example, if I change one item’s ranking from 25 to 30, I want the rankings 26-30 to automatically shift and become 25-29 (while still assigned to the same item they originally were). Are there existing functions I can use to do this?

command line – how to adjust screen brightness in ununtu 20.04 LTS from terminal

I have installed xbacklight and am getting ‘No outputs have backlight property’ on executing

xbacklight -set 50 OR

xbacklight +10

My system directory: /sys/class/backlight is empty

I have seen some solutions for the same but am unable to change brightness from terminal.
please help me