Henrik Carlsson's Blog

All things me.

posted this note on and tagged it with 3D printing Narrating my work ΠiFi Music Player

Turns out there where multiple problems with yesterdays attempt at a base plate for the πFi.1 I had the measurements for the QR cards completely wrong, so even if the Pi had fit it wouldn’t have worked.

This morning I drew up a quick 2D sketch in OmniGraffle and then I worked from that one to get the 3D version in Fusion. Hopefully this one will work better. The printer says about six hours to print.


  1. Note to self: Make up my mind whether it’s πiFi or πfi. 
posted this photo on and tagged it with 3D printing snapshots The Year of Music ΠiFi Music Player

The first print is done but I will need to redo it tomorrow. I forgot that the front mounting holes in the Pi isn’t at the very front so the space between the QR holder and the camera pole is too narrow.

posted this photo on and tagged it with 3D printing snapshots The Year of Music ΠiFi Music Player

The first prototype of the Pi base plate is in the printer.

posted this note on and tagged it with 3D printing Narrating my work The Year of Music ΠiFi Music Player

I’m changing things up for the πiFi Music Player.

The way I intended to make the πiFi I would need to do most, if not all of these and it just makes it too large of a project. So I’ve scaled it back. At it’s core it is still going to work the same way but instead of having a built in power amp and connecting it to custom built passive speakers I’m going to make a device that gives line level audio out and connect it to a pair of powered speakers that Iris already have but rarely use.

Raspberry Pi Zero with a JustBook DAC Zero

At first I decided to do this using a Raspberry Pi Zero and a JustBook DAC Zero and that was what I sat down to work on tonight. Unfortunately I realised that the Pi Camera Module needs a different cable to be compatible with the Zero and none of my usual suppliers for these kinds of things have that cable in stock. As I was thinking about whether to keep working on other parts of it hit me, why not use the Pi 3 that I used before but without the power amplifier hat? It has a line out built in and works with the camera cable that I have?

So tonight I’ve been working on the first iteration of a simple 3D printed base plate to mount the Pi on, with place to stick the QR codes on in front of it and a mount for the camera. So far the camera mount isn’t finished but I do have a prototype sketch that should work for mounting the Pi and the QR codes. I’ll try to get it printed tomorrow.

A screen shot from Fusion 360 and my sketch of the base plate.
posted this audio on and tagged it with The Year of Music

Wow, I’m actually (kind of) recorded something…

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What Mac laptop should I buy?

posted this article on and tagged it with Mac Narrating my work

It’s time for me to get a new computer at work this year. We generally use Macs and we get new ones every three years. From 2015 to 2018 I was using a 13″ MacBook Pro, a computer that I truly loved. I had all the ports I needed (as long as I remembered to bring a Thunderbolt to Ethernet dongle) and it was small and light in my backpack.

Twenty-eighteen rolled around and it was time to decide on a new computer. By that time some of my colleagues had gotten the new USB-C/Thunderbolt 3-only laptops in the previous year and results where mixed to say the least. To give some examples, one of my colleagues absolutely loves here 15″. Another one is quite happy. One likes everything except the TouchBar. One likes his computer but has had to have it serviced multiple times do to keyboard issues. Another one has been serviced because of screen problems. Another colleague abandoned the Mac platform entirely. I felt quite strongly that I didn’t want to get into the potential problems of dongles, keyboards and all the other stuff but I did want to stay with the Mac. Fortunately I had one option, the 15″ late 2015 MacBook Pro was still on sale so I decided on that one.

Since then my computer and me has had an on again, off again relationship. I love the fact that I rarely need a dongle to anything. I love that I can plug in both SD cards and USB flash drives whenever I want. And MacSafe keeps being great. However it is was too big for my taste. The 15″ form factor is really not for me. It has even gotten me to the point where I occasionally get out the old 13″ and bring that one in my backpack. Also for the last six months or so I’ve really felt that this machine (the 15″) is letting me down in terms of speed and the fan noise in Zoom meetings is driving me crazy.

So it’s time to get a new one. When the 16″ hit the market last year(?) I thought I new what the future held in stock for me. I hoped for a similar 14″ form factor and that that computer would be the one for me. Now such a computer doesn’t exist. But the M1 laptops exist and they seem very nice. But am I ready to jump on a new technical platform early on? Will Pro Tools, MediaComposer and similar tools work? Will all my x86 terminal tools be available for Apple Silicon? And most importantly, do I feel like I have the time to figure these things out?

My options

Here’s basically my options:

The basic problem that all three have is that they are USB-C/Thunderbolt only. I would really, really like to have at least an HDMI port and an SD card slot. And now there seems to be some rumours about upcoming Macs that might have that. But to I have the time to wait? Last week I would have said yes, at least wait until after WWDC but yesterday I realised that the most likely reason why my 15″ wobbles on the table is that the battery has started swelling and that seems like something that will kill it sooner rather than later.

With that in mind I probably just need to suck it up and head into the USB-C world. And if I do that the Intel 13″ has a distinct advantage in that it has four ports instead of two. Two seems to be very few. Also the Intel one has a know processor architecture. Every piece of software will probably work just as well as on the old 15″, right? Right?!?!?

Well, maybe not because my 15″ is still on High Sierra.

Let that sink in for a moment.

I still use a laptop on High Sierra.

Why? Simply because when Mojave came out I just couldn’t be bothered with checking whether all the tools that I need to do my work still worked or not. I had one small child and one very small child at home and messing with things that already worked seemed like a terribly idea. And then I stuck with that solution. This computer will remain on High Sierra until it dies. This makes it quite possible that the transition to a new computer will be less that smooth even if it’s still and Intel machine.

So the ports then. Four is indeed more than two. And why settle for two when I can have four? Well…

That’s why:

Geekbench scores for my three options, compared to my current machine.

Based on this, getting a new 13″ Intel machine seems like a very small step up from what I have today, but a small step that still brings the hassle of new ports and an os that means I will have to do a lot of compatibility checking. On the other hand, getting an M1 machine almost doubles my single core performance scores and more that doubles the multi core ones.

So a MacBook Pro 13″ with an M1 then? Weeeeeeeeeeeeeeeeeell, if it had four USB ports and the Air only two then the deal would have been sealed. But the port situation is the same for both. And the Air has the added benefit of being fan-less. As I currently hate the fan noise from my computer maybe this is the way to go? Or maybe not having a fan means it’ll throttle the processor way too often resulting in I poor experience in the long term? So that can go either way.

And then there’s the TouchBar, or the lack of a TouchBar. The Air has proper function keys, while retaining TouchID. Even though I’ve only briefly tried the TouchBar on other peoples computers it seems to not be something that I want to have. Potentially cool but as far as I’ve seen there hasn’t been a ”killer app” for it, but there is the risk of accidental input.

In conclusion

It’s a bit anti-climactic but I don’t know for sure which way to go. In writing this text I think I’ve settled on getting a new one as soon as possible, and narrowing the choice down to either the MacBook Pro 13″ or the MacBook Air, both with an M1 processor. Which of those I should go with I still don’t know.

Any suggestions?

posted this listen on
Listened Tour de France (2009 Remaster) from Spotify

Tour de France (2009 Remaster), an album by Kraftwerk on Spotify

🔈 Now playing: Kraftwerk – Tour de France

posted this note on

20210120274566.jpeg

This photo was taken six years ago, almost to the minute, right after we came home with our daughter for the first time.

Happy birthday Iris!

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posted this photo on and tagged it with Video Production

Exploring new grounds

2021: The Year of Music

posted this article on and tagged it with The Year of Music

My yearly theme for 2021 will be The Year of Music. The point of this theme is to get me to do more music related things.

Listening

Doing that could be as simple as listening to some music during the day. For quite a few years now I haven’t been listening to much music. I often have my AirPods in my ears but most of the time what I’ve been listening to has been a podcast or, more recently, a YouTube video. For the second half of 2020 YouTube has more or less become the background noise of my life. This is something I really want to change.

I really enjoy listening to music and doing it makes me happy but it’s so easy to get stuck in the hole that is YouTube and podcasts. The podcast part has sort of fixed itself because it feels like I’ve burned out on most podcasts. Now there are a very select few that I actually care about listening to. On the other hand YouTube, as I wrote in the past paragraph, is a growing problem.

And don’t get me wrong, a lot of the stuff I watch on YouTube is great and I really want to keep watching it but every now and then I should turn off the videos and turn on some music instead.

I should probably also commit to listening to more new music, since my interest in whats currently popular has been close to zero for at least ten years now, but I feel like I need to set reasonable goals. So if I do listen to new things, that is good. But if I chose to listen to the same old stuff that I’ve always been listening to, that is also good.

Playing

Another way to progress the theme is to play music. I love playing guitar, tinker with synths, recording things and so on but I do it way to infrequently. Especially the recording/producing part has been close to zero for a long time. When I want to record something I would like it to be something that I’ve also written myself but that is something that I need to let go. I haven’t actually finished writing a song for a decade so it’s time to uncouple songwriting from recording an instead record some fun covers or something. I do have a more specific plan here, but that’ll have to wait for another day.

Making things

Making things related to (listening och playing) music is also part of the year of music. Working on the πiFi Music Player for instance is absolutely something that furthers the theme.

Setting up my home studio

If I were to calibrate the monitor speakers of my home studio or rerouting cables, setup synths and so on, that would also be compatible with the theme but I need to make sure that I don’t get stuck in preparing for a recording that I never make.

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