Onno (VK6FLAB)

Anything and everything Amateur Radio and beyond. Heavily into Open Source and SDR, working on a multi band monitor and transmitter.

#geek #nerd #hamradio VK6FLAB #podcaster #australia #ITProfessional #voiceover #opentowork

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Joined 7 months ago
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Cake day: March 4th, 2024

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  • Multiple camera angles are used for two reasons:

    1. Added visual interest. People tend to want variety and colour and movement offered by different views can provide that. This is the obvious reason it’s being used.
    2. Ability to edit without it being obvious. Often a presenter will require multiple takes to “get it right”. If you edit in the take, the picture “jumps” because humans move around. If you have multiple cameras you can edit and switch cameras without it looking like an edit. If you then also look at a different camera when you make a mistake, you can keep recording and fix it when you edit it together.




  • Onno (VK6FLAB)@lemmy.radiotoLinux@lemmy.mlBeginners Guides
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    27 days ago

    My first recommendation is to become familiar with one flavour of Linux. Debian is a solid choice and it will give you a good understanding of how a great many derivatives operate.

    The command line is a tool to get things done, it’s not an end to itself. Some things are easier to do with a GUI, many things are easier to do with the command line interface or CLI.

    Many Linux tools are tiny things that take an input, process it and produce an output. You can string these commands together to achieve things that are complex with a GUI.

    Manipulation of text is a big part of this. Converting things, extracting or filtering data, counting words

    For example, how many times do you use the words “just” and “simply” in the articles you write?

    grep -oiwE "just|simple" *.txt | sort | uniq -c

    That checks all the text files in a directory for the occurrence of either word and shows you how many occurred and what capitalisation they used.

    In other words, learning to use the CLI is about solving problems, one by one, until you don’t have to look things up before you understand why or how it works.




  • Sadly not. Form an audio frequency perspective, noise is many different frequencies. The human voice pretty much matches human hearing.

    A voice is not one frequency, that’s a tone. We’ve constructed systems that throw away much of the voice frequencies whilst still being understandable. Telephone calls, digital radio communication, etc.

    That’s not to reduce noise, it’s to cram more calls across the same link. There’s a side effect that does reduce noise to some extent, but not significant enough to remove construction noise.


  • I suspect that your success rate will be very low. Bone conduction microphones might be your best bet.

    Fundamentally a microphone doesn’t know the difference between “good” sound and “bad” sound.

    Most noise cancelling solutions are based around the idea that nearby sound is good and distant sound is bad.

    It differentiate between the two by using the fact that it takes time for sound to travel.

    If you have two identical microphones, you can set them up so that you talk directly into one, but not the other.

    Any environmental sounds are picked up by both and used to cancel it - sometimes in software, other times just by reversing the microphone polarity.

    Bone conduction microphones get their signal from physical contact with the audio source, your body.

    Source: I’ve done a little bit of audio recording over the years in and outside of studios. My information might be incomplete and out of date. YMMV.



  • Generally laziness helps.

    If you host a system, then you have to dedicate resources to maintaining it, which quickly escalates to lack of interest.

    If you pay someone to host it, you get to spend your energy on things that you’re interested in.

    If you can find people to pay you for things that you’re interested in, but they just want fixed, you have a business.

    So, be conservative in what you host and frivolous in what you outsource.

    Note that this says nothing about FOSS. since that’s about a related but different concepts.

    From a FOSS perspective, be frivolous (as in, do lots) in your bug reports and patches, be conservative in which projects you own.





  • If you’re not a programmer, then what you’re saying sounds reasonable, but if you are, it’s not.

    Different operating systems use different ways to interact with the outside world, in fact, it’s pretty much the only thing an operating system does.

    Consider for example responding to a mouse click.

    Each operating system handles this differently, sometimes within the same OS it’s different depending on what else is happening, (Linux X11 vs Linux Wayland).

    A mouse is pretty trivial on the face of it, but the operating system needs to be able to track each pulse from a mouse and respond to that and then it needs to tell your program about it. In other words, it needs to interrupt your program, deal with the pulse, update the relevant information, then resume your program.

    The same is true for the screen, disk storage, keyboard, memory and even the CPU itself.

    Even if the various operating systems use the same CPU, and these days they mostly don’t, running the same program in multiple places is extremely rare, and that’s for companies who have the source code to the software they sell.

    Some programs are more universal, because they’re written in a language like python that’s compiled when you launch it, but dig inside and you’ll find code specific to each operating system.

    Source: I’ve been writing software for over 40 years.