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#diy audio
jelabs · 3 months
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takmiblog · 2 months
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MOSFET Single Ended Pre Amplifier (modified)
MOSFET : LND150
Total Gain = 2.05
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seshaudio · 2 months
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Omnidirectional build Mk0
I got hold of a cheap little driver in London for £15. It's rated for 200W peak power, 40Hz-10kHz (so sadly not much high frequency once the lamellae are attached!) I removed the rubber sleever and the dust-cap
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Next I used some grocery-store plastic sheeting (what they put up promotion signs/prices with) that can be moulded using hot water. I used a metal grille bent into a curve to make curves out of the plastic, then cut them into roughly the right shape. I made the paper shape guide by just rotation a ruler held at one end - this was totally eyeballed and could've been done much better, more precisely etc.
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Then I attached some sticky-backed weather stripping to each of the lamellae (aka petals), and used double-sided tape to stick them onto the speaker cone. I used a log with a notch cut into it, attached through the speaker magnet's central hole with a long screw, to hold the tops of the lamellae.
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Then with a bit of wiggling and more double-sidede tape I attached all the lamellae together at the top. I used some washing up gloves cut into strips as (very makeshift) gaskets to mostly seal the gaps between the lamellae. Again, I used double sided tape to do this. To be honest that was the most fiddly part. Washing up gloves cut with scissors are not an ideal Radialstrahler gasket material!
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And there it is! It doesn't sound terrible on its own, but as the driver is only rated up to 10kHz (and who knows what impact the radialstrahler build has on the theoretical frequency response!) I had to wire it in to an old bookshelf speaker's tweeter to get a bit more high-end.
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I'll make another post with a few more videos of it playing, along with some discussion of what I've learned so far to take forward to the next prototype!
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wardfamilyknox · 1 year
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soothing video of diy liuma流麻 (a popular type of fandom merch in china) (cr: 路遥星亦辞)
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muchomago · 1 year
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first time using the wood burner thing
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not beautiful but it was a fun attempt
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ilaria-jinx · 21 days
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Podcasters Needed
Hi everyone! Hope you guys have enjoyed my blog. I’m reaching out to the general community to see if there’s anyone on here interested in being a part of a podcast project between myself and @arlen-oliver .
We’re working on two serial fiction podcasts (and subsequently creating a production company to put them out); one is fantasy, the other is sci-fi. Given that this is a huge undertaking, we’re looking to see if anyone outside of our small sphere of real-life people would be willing to get involved. We’re looking for voice actors, editors, artists, or a mix of all three or someone who wants to do something entirely new.
If you’re interested in learning more, please join the Discord Server at the link below!
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comedycraze · 2 months
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SHOP NOW
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auberylis · 1 year
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I MADE A FUCKIN' FIXED FILTER BANK MODULE WITH MY BARE HANDS
and a soldering iron. AND i'm giving all the deets on it to you 4 free!
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That's right. 10 discrete core VCAs, followed by 10 fixed frequency bandpass filters, all controlled by a set of macro controls like the scanner and odd/even band CV and audio inputs, mixed down using a two-bus switch-selectable audio summator. Why? Because why not to divide your complex audio source into separate tiny little bands, and then control the volume of each one in weird ways for fun? Really though, check out what feeding it some white noise and sequencing the scanner thing alone can do, with a bit of end-of-chain delay and a short envelope to all bands thrown in.
I designed and built this in about 3-4 months, but most of this time was spent sitting and staring at the box with parts in dread. This is a hardcore build, the most hardcore SDIY build i did so far. How do the GUTS look like? Well, here's how - it is a battery of PAIN built of pure MADNESS, although a fairly orderly and manageable one. If someone manages to build this, i will probably send them a congratulatory postcard and a free module.
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Oops, all veroboard! Also, power and master signals delivered to them via bare wires skewering the ten boards behind the unit. What a beauty - definitely a safety auditor's dream, too! :3
This all took a considerable amount of time to wire and debug. But! If i did it, humans can do it, because i am a human. Which means, if someone really wants to, they, too, can have a cool filter bank. For this reason, as usual, i wrote up on this thing on my website. Not only what it does, but the schematic, the veroboard layouts i used (you better not use them directly and instead make them better first), circuit notes, more COOL audio, photos (although those four are pretty much it), and everything else - all this can be found out there at my cool synth website. So, even if you're just curious for more sound demos, go check it out. And i dare an SDIY enthusiast to actually pull this one off.
Anyways, now that i'm done with this chunk of wires and parts from hell, i'm going to go sleep my happy sleep of a girl who owns one vast entire extended fixed filter bank.
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jelabs · 8 days
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takmiblog · 2 months
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LND150 Pre Amplifier ( design plan )
2024/03/24
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seshaudio · 2 months
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Reviving this tumblr page 10 years down the line, to post some updates on my upcoming Omnidirectional speaker project
In brief: I want to design and build a set of speakers that play high-fidelity, omnidirectional sound, for the primary purpose of running UK/Jah Shaka style dub and reggae sessions.
I'm currently most set on Awassa Sound System, but really like the relevance and cheekiness of Omniscience Sound/Hifi. I think Awassa has a better ring to it, and an air of mystique, even.
Here's a breakdown of the plan so far:
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As for order of operations: Step 1:
Make a cheap and cheerful prototype of the MBL drivers. I just want to cut my teeth on the hardest part, to start building familiarity with the materials, principles, and manufacturing processes that will be involved in the build of the larger, final version.
If my friend who's into CAD and CNCing is willing, have him whip up some test lenses.
Use recycled drivers from old, cheap speakers as much as I can to keep initial exploratory costs down.
Find an active cossover unit that I can use to test different crossover frequencies with the different driver designs
Step 1 will be considered finished when I either have a working, not-awful-sounding radialstrahler, or have decided to abandon that aspect and am comfortable focusing on other methods for making omnidirectional sound.
Step 2:
Work on the other parts of the tower, namely the horn-loaded lens tweeter, the mid-bass lens, and the lower cabinet (lots of flexibility for internal design with the cabinet).
The cabinet (and maybe the horn lenses) will require learning to use a speaker simulation software
The bass scoops can come later, as there's not a lot of point building small/low-power scoops
As soon as I have a sense of what the appropriate crossover frequencies will be, order a custom dub preamp such as the RasFX Mini Pre
Get a set of relatively affordable power amps to drive the whole thing. 4 channels for a single tower to start with
Step 2 will be considered complete when I can gift (for cost of materials) a MK1 pair of these speakers to a friend of mine who's into sound system too - and of course build a set for myself!
Step 3:
Assuming everything goes smoothly in Step 2, work on scaling everything up. Size, power levels, etc. The rough goal is to be able to power a party with around 100-200 people. Maybe more, eventually
Try to figure out a way to be able to retain the functionality of a dub preamp for playing reggae, but also run the system in stereo for when I want to play
Build a set of scoop style subwoofers. The more, the bigger, the better!
Step 3, and thus the main body of the project will be considered complete when I have a fully functional, high-power sound system able to at least impress, though maybe not directly 'compete with', the current generation of younger sound systems like Indica Dubs, Ital Power, Creation Rebel, King Majesty, Sinai, and other such outfits.
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Step 4:
If everything up until this point has gone very well, and I feel confident with the various technologies, try to develop the designs to a point where it can stand as a single 'totem pole' style tower that can play to a decently-sized crowd of people.
I picture taking something like that to e.g. Boomtown Festival, and decorating it in all sorts of wacky space-age or mystical art. I think the fung shui of a single, central sound source would be really unique in a festival setting.
The big barrier is that omnis, when places inside, rely on walls and surfaces to create the feeling of 'omnipresence'. Outside, I'm not sure that'd work at all, let alone
Step 4 being complete would inherently require my sound to be powerful enough, high-enough-fidelity, and well-known enough to be included when people talk about "well-established" sound systems. The totem pole thing is a bit of a gimmick, let's be honest.
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Imaginary step 5: If my work on this project can inspire more people to think outside the proverbial speakerbox when it comes to building reggae sound systems, I'd be a happy camper!
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teddybasmanov · 5 months
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Orion: *tries to kill Deacon* Deacon, the moment he steps into Orion's living space: *goes full DAD criticising his home craft skills*
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twigsandhearts · 5 months
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How nerdy is it of me to make a patch for my jacket based on my own podcast? (asking for a friend)
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aeolianblues · 24 days
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Blur - Girls & Boys, Coachella 2024, weekend 2 (20 April 2024)
‘Wow... sorry, but for me, that's like... that's the spirit.’
Damon was in a playful mood during this song, wasn't he? Taking full advantage of a slightly more responsive crowd than weekend 1 of Coachella, he got up into the crowd, headbutted a beach ball, was a bit purposely out of time and key to change things up; "spin it if you want: girls sing 'boys', boys sing 'girls'" during the second chorus, and I think he was pleased to be playing with and playing to a crowd that was receptive. Slightly shambolic performance, but isn't that the Blur we know and love.
I noticed only now that Damon's done something I often do (that maybe bums out people 20 years older than me), which is that since I didn't really live through the 90s, out of habit, I've always sung, 'Love in the 90s was paranoid' (instead of 'is paranoid'), and Damon did the same here. Huh.
Anyway, this performance was a bit mad, I hope this wasn't really the last time we see it!
@damonalbarn
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