Driver – Identify an unknown sound device

Since using my Mac for presentations at workshops and conferences, I seem to have found quite a few "exotic" drivers that are part of presentation AV devices. The latest addition seems to be the "Data source element 0"in the sounds dropdown, I think I found the culprit in Audio MIDI Setup (At least there is an audio driver from on from these AV rooms), but the - Key is not available any Device.

How do I go about finding out where it comes from and removing it?

Screenshot of Sounds Dropdown

Presentation – How can a small device best be shown on a larger display?

I'm doing a presentation for a responsive site that I and my team have developed over the last few weeks. We'd like to avoid using slides and do a demonstration on a protector and show how using a phone works.

One way would be to use the browser and open the developer tools and view the device frame in this way.

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That way, I would not need a phone, but this is just an emulator. The browser does not use the same engine as the iPhone (in my example).

So I'm trying to find an alternative, as there are some inconsistencies between the browser and the phone in the prototype that we have now developed, and therefore looking for a way to use the phone during the presentation.

We look forward to your help, tips or ideas.

Device recommendation – How to choose a starter kit with 1 or 2 lenses?

Your own taste and interests will lead you to your "final" objectives (there is no such object, but you will at least do it.) after all be in a state where you know what your specific areas of interest are, and buy large glass accordingly). But as you start, I suggest you investigate in the next few years. Depending on the course, buy and sell lenses, book the reading and (most importantly) the experience you collect. As a beginner (I was there about 5 years ago) there are some opinions / experiences that I can share:

  • The kit lens is a good starting point. If you close something, it can be sharp, and the macro level can be decent (compared to a long prime). I left pretty fast to make a "cheap prime" trip … but looking at my early lens lens images, they were not that bad.
  • "Cheap" (say: not fast, like f4-5.6) Telezoom (eg: 55-250mm) are only good outside, where there is MASSIVE amount of light. So just take one if you want to start taking pictures of children's sports, taking the first steps in bird photography. Image quality and bokeh can only be decent for these applications.
  • Primes are generally a good choice if you want to start taking photographs, as they will take pictures that are different from most phones. In addition, you can find out what your specific fields are: portrait, macro, landscape, bird photo, astrophotography, etc. are first-class glasses for every budget and every need.
  • To try a lens before you buy is one thing
  • Renting is one thing
  • AND Buying used, especially for beginners / amateurs, is definitely one thing

If I had to start from scratch, I would only get two lenses after the lens:

  • A normal telephoto, fast (50 or 85 equivalents). This gives you bokeh, great personal portraits and you can concentrate on your work.
  • A 35mm-like (slightly wider than normal) equivalent. Here you can work on storytelling and compositions while you are an appropriate lens for portrait, landscape and all-round lens (eg vacation).

If you're shooting Canon, that would be:

  • A new 50 f1.8 stm EF (they are so cheap, even new), a used 85mm f1.8 or 100mm f2 (no macro). The latter is my personal favorite, but frankly the 50mm is a better choice the first time.
  • A 24mm f2.8 (for an APS-C sensor) or 40mm 2.8 (for a full screen). Unfortunately, the Canon 35mm for full-frame is really expensive, so the EF-S 24 and 40 EF pancake lenses are the better choice … besides, they are the only two Canon pancake lenses … super sharp, cheap, relative fast and super light / small in a bag.

For Fuji, I would choose 23mm (35 equiv.) And / or 35mm (about 50 equiv.).

I do not know enough about other manufacturers to comment on them.

If you're using a Canon APS-C, keep the following in mind:

  • Bird / Sport: A used telephoto zoom, like a 70-300, just to see if you like it
  • Indoor sports, landscape: 10-18mm. It's a fun, sharp, relatively cheap lens, but only for APS-C.
  • Astro: An off-fire lens with wide and fast manual focus (eg 14 mm to 2.8 or 24 mm)

Cheaper lenses (like Canon "L") lenses are great, but it's only worth it if you know what you love.

Device Lock – Disadvantages of displaying the email address on the Android lock screen

My default Android 9.0 gives me the option to show a short text message on the lock screen. I'd like to add my e-mail address here so people know how to contact me if they find my phone.

Are there any disadvantages? The address is linked to the Google Account used on this phone.

I know there are other ways to get my phone back, such as: B. to find the phone. However, I want a way for the finder to find me, rather than the other way round.

Device recommendation – 1 or 2 lenses "Starter Kit"?

Is this a 2-lens starter kit that is a good option for someone who starts a world of photography? Have you developed a series of lens options right from the start in order to develop a sense of the lens you want to use? A 1-lens kit is better for developing the person's abilities without being overwhelmed with a lens that may not know how to use it?

How do I register a device MAC address for a WPA2 enterprise wifi?

I am studying abroad and trying to communicate with my technical support to register my device in the University's Wi-Fi network, but they do not really listen to what I have to say (either because they do not understand my English well or do not know it how to do that, what I'm talking about).

Are there any instructions or ways to tell them how to do it? How can I register it myself? There is no online link or browser registration page.

Mobile App Development Tool – Kony

If you want to build your mobile app from scratch, there are a number of tools available as part of advanced mobile app technologies. The tools below are ideal for developing a complete app from scratch, and provide multi-platform capabilities to reach a broad audience. Echo Innovate IT has put together a list of mobile app development tools that help you create a bug-free app from scratch.


When Kony connects to a single IDE, a developer can create JavaScript apps that run on all platforms. However, this tool is a bit of pinching the bag, especially if you want to create more than one mobile app, want more than a hundred users, etc.

The Kony mobile app development tool can support a variety of things including API management, catboats, voice, customer reporting, augmented reality, reference apps and many more. While the tool itself can be installed on both Windows and Mac computer systems, the associated mobile apps are used for previewing and testing on the device on which it is to run.


Mobile app development tool

There are a variety of mobile app development tools to create your favorite app.

1) Mobincube:

Mobincube is a great app interface that allows users to develop any kind of mobile app. Developers can create an app for business, education, entertainment, health, and more.


Create mobile stores and increase your sales
Enables the integration of third-party solutions into the app
Helps to develop advanced features
It allows updating of online content
Customize every little detail in the app
Allows communication with users

2) Long range:

LongRange is a native tool for developing mobile apps. It consists of components such as navigation, tabs, form views, and commands, and requires the installation of the LongRange server.


It runs very fast as a native app and provides reliable reliability
Create native mobile apps that use only RPG / CL with DDS
It provides the infrastructure for the application.
Develop only with the current programming knowledge
Develop without JavaScript, HTML or CSS knowledge
You only need to write once and deploy to Apple mobile devices and to deploy
Use features for mobile devices like GPS, camera, audio, SMS etc.
Automatically transfer app updates to mobile devices
Reduce the cost of managing and expanding mobile apps

3) Qt:

Qt cross platform SDK. It offers cost-effective design, development and deployment. It gives developers the best user experience on all devices.


New enabler classes for windowing and rendering
Parser and compiler optimizations have been implemented
It provides support for opaque private keys
Support for IPv6 and dual-mode networks
Workarounds for bad SSL servers


Device recommendation – Change head on tripod

I got a tripod that was creatively named: PT-TPM665-C

I'm pretty happy with it, but it can be frustrating to work with it. It feels more like videography than photography, and it has to be fought to get in the right angle. I think a ball head will be a great improvement.

The problem is, I'm a noobie and I do not know any different tripod attachment systems. After all, what I can say is a 1/4 "ish screw.

Is it a standard size? Does this mount size have a name?

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