Archive for the ‘diy’ Category

a waveform sung into a can

I have a waveform! I did a bunch of testing of various parts and such, discovering that the carbon transmitter (microphone) I had was indeed fully functional, and really, it came down to “not enough voltage.” 1.5v is pretty borderline for carbon microphone power, so that’s fine.

The waveform is kind of lopsided, but that’s because this test harness doesn’t have the balanced output yet; I’ve ordered the balanced transformer, and that should help. It’s also a bit noisy – here’s a sample – which is partly related to SHIELDING WHAT IS SHIELDING because it’s a test harness.

Talking of, here’s what version one looked like:

This is a direct implementation of the first half of the circuit described in this instructable, which runs off a 9V battery. Once the rest of the circuit is added, it’ll have balanced output, which is pretty snazzy.

This is a closer view, and also after I added an LED, because hey, LEDs!

After that, I tried a smaller capacitor, and that’s working fine – mostly, I’m just picking from what I’ve got, which goes along with what the circuit designer described.

I’m going to play more with the circuit a bit, pending getting the matching transformer. And some shielding.

And, of course, the can. šŸ˜€

ps: this harmonica “bullet mic” looks pretty cool too.

a mic of constant sorrow

I’ve been trying to build a carbon microphone. Why? Well, partly, because I can, and partly, because if you want that “telephone” sort of sound, the best way to do it is to use a telephone element rather than fake it later (see also: BULLHORN), and partly because I want to be able to sing into a can, like them fellers at the radio station.


A Microphone of Constant Sorrow

And this should be – electrically, at least – very simple. Small power supply – battery is fine – resistor or two, capacitor. Done. Very simple circuit.

But it isn’t working, and I have absolutely no idea why, and I’m highly frustrated. I’m going to try a higher-voltage circuit, which I’ve been avoiding for no good reason other than it shouldn’t help, but I’m starting to think the carbon element I got new-old-stock off eBay isn’t up to snuff.

Anybody else built one of these monsters before? I have actually managed to get extremely-low-volume recordings out of it a couple of times – far too low level to be useful, I’m afraid – so I don’t think the element is actually dead. But honestly, I have no idea.

eta: GUESS WHO HAS A WAVEFORM šŸ˜€


A WAV of Constant Sorrow

oh dear it’s another project

Or more correctly, a few other projects. Or hilarious things I found out.

ONE! I need a bullhorn for the chorus of this song. YES A BULLHORN. Yes, I can fake it with plugins but searching around for advice online, the most common answer by far was Just Get A Bullhorn, They’re Cheap. And they are, you can get a decent one for $9.

TWO! I’mma gonna build a carbon button microphone – think antique telephone, like those things from the 1930s-1960s – and nobody can stop me. Turns out the parts are cheap and you don’t have to spend $250 for that one from Gold or whoever.

THREE! As I posted on Facebook over the weekend, turns out those old Square credit-card readers for your phone or tablet that let you take credit cards at shows? They’re purely analogue devices, which is why Square upgraded everyone for free last year. Meaning they output sound. Meaning I just recorded the audio of my Costco card and this is hilarious.

I need some quarter-inch magnetic tape, stat. XD

interviewed on tumblr

Over on Tumblr, monsterquill interviewed me for a project, and I figured hey, let’s post it here too. Particularly since yep, still busy! monsterquill is in bold italic; I’m in regular text. Enjoy.

Why do you do fan music, what do you like about it?

Oh, well, mostly, because it’s fun. I mean, sure, I’m not going to lie; it gets attention, because you have a pre-existing audience to leverage, and all that. But I was coming up with fan music when there wasn’t a receptive audience for that kind of thing, I just wasn’t recording it – just because it’s a way to do fandom.

How did you get into it?

Same way as people get into fan fiction or fan art or anything else fannish (to use an older term) – THIS IS AWESOME I’M GONNA DO A THING! And then I did a thing. I also drew some fairly terrible (and some halfway decent) comic art and wrote fanfic. Music is just another aspect of that.

How are you involved in fan music community, & how would you describe it?

Well, I started nwcMUSIC, a geekmusic festival held as part of Norwescon, and ran that for six years – this immediate past year was the first one they ran after I handed it off, and I think they learned some things, and will continue to improve next year.

Describe it? Jeez, that’s a bit of a question. There are so many different such communities – the chiptunes crowd and the nerdcore crowd definitely overlap, and they talk to each other a lot across geographic regions. There’s an older folk tradition called ā€œfilk musicā€ which was the first really organised geek or (ā€fannish,ā€ in the old language) music community, and they started releasing audiocassettes in the 1980s. (Look up Off Centaur Publications and go from there if you want to dig into that part of the history.)

There are a fair number of differences in specifics, but it’s funny how the patterns repeat. Like, nerdcore people get together in the hiphop tradition and do improvised/freestyle rapping over beats, which tend to come from chiptunes, and it’s at homes and sometimes at events and everybody’s just getting together to do stuff, right? These are called cyphers. But filk started doing almost exactly the same thing a few decades before, but folk-music-y, and called them ā€œhousefilks.ā€ Chiptunes people have a name for their improv/workshop/fun playing get togethers too, but I don’t remember what they’re called at the moment.

How do consuming a fannish thing and producing your own work relate for you?

Well… in both cases, I guess, I’m playing to the same audience, which is to say, me. And also people who like the same things as me, at least, within a certain range.

What genres of music do you tend toward, & what subjects, & do those affect each other, & do you use different ones?

There is very little geek metal out there, and while I’m playing acoustic instruments most of the time, what I’m really writing a lot of the time is metal. Early metal, rather than more modern metal, but still – that’s why the most common comparison by far that I hear is to Led Zeppelin. (Occasionally I’m thrown in as folkpunk, and get comparisons to The Pogues. But most of the time, it’s Led Zeppelin.)

My personal background is a mash of Newfoundland folk, metal, and electronica. In released material, I mostly hang out in the folk/metal arena, but I’ll drop a rock track once in a while. Pretty much always, I just go where the song says I need to go.

Like, when I did my first released fannish track – which was really an exercise in how to use a digital audio workstation – it was straight-up rock and roll, because the song required it. There’s a cult classic film called The Adventures of Buckaroo Banzai Across the Eighth Dimension, and it’s an odd, odd film, and I really like it. Part of the shtick is that Buckaroo Banzai is a brain surgeon, physicist, and! leader of a rock band called The Hong Kong Cavaliers, and successful at all three at the same time. (And also, he’s a pulp adventurer, but I digress.)

Given all that, it bugged me that they never got to do a whole song in the film. They start a couple, but plot happens, and they’re interrupted. Soooooo… a bunch of new lyrics, some additional instruments, and a zillion edits later, I’d scraped off every note out of the film and finished that song.

And it’s called The Diesel-Driven Eight Dimensional Jet Car Blues, and it’s on my fan-music page, http://crimeandtheforcesofevil.com/free to this day. šŸ˜€

What’s your songwriting process like? What inspires you to do a song?

The problem with a day job is that you have a day job. The advantage of a day job – at least, one that doesn’t eat your life, and I note that I didn’t do any music while I was a software developer in the industry – is that you can really pick and choose.

But even without that option – everybody writes for the same reasons, be it writing fiction or drawing artwork or making music. It’s all the same answer. I guess for musicians, it’s ā€œI want to say a thing about a thing, but with a good beat.ā€

I heard a good analogy the other day – artwork is how we decorate our space, but music is how we decorate our time. I really like that. I also think – while not at all asserting there’s no overlap, because of course there is – that art is how we write down what we see, writing is how we write down what we think, and music is how we write down what we feel. Music is transcription of emotions, and lyrics add thoughts to give specific context.

Or that’s how I look at it, anyway.

that “apple is stealing your music” blog post

There’s an “Apple is stealing your music” blog post going around on Facebook today, and people are freaking out in that “we’re freaking out about this” way that they do, and as someone who talked about this when Apple Music rolled out, I have to step in and say some things.

First: This is Apple Music, which is to say, Apple’s stream-everywhere service. Think of Pandora, but also streaming your ripped CDs and so on. This is not core iTunes functionality (tho’ it is delivered from within iTunes if you enable it), this is not your iPhone, or iPod, or whatever. You have to sign up for this and pay for it. It’s $10/month.

Second: Here’s the thing. I don’t like Apple Music and don’t use it, for several reasons, one of which being this one. I am not an Apple Music fangirl defending my platform here, I don’t like it or use it.

But.

The whole pitch of Apple Music, the whole point of it, is to make “your” music available to you everywhere, as well as give you access to Apple’s very large streaming library service.

I use quotes around “your” up there, for very good reason. You don’t own most of your music. You just don’t. See this four year old but still relevant commentary on so-called ownership of music for details. What you own are limited rights to music.

This means that Apple cannot legally upload your specific copies of licensed songs to their servers without paying the RIAA buttloads of money – far, far more than your monthly Apple Music membership fee. Cannot, as in, it’s illegal. The only way they can offer this service is to have a licensing scheme set up, which pretty much means the reference-library approach they’re taking.

Now, they can upload stuff that is actually yours, with your permission. And they’re doing that, according to this article. (And other sources, for that matter.) They have to do that, in order to share it around; that’s kind of implicit with the service.

But they’re probably not going to store uncompressed WAVs. They’re huge. Your phone’s data plan will be hammered if they stream WAV files. Everybody and their mother would rage about that, and for good reason, and the mobile market is most of the reason to have this at all. So, for these very good reasons, they’re going to compress.

(Now, they might upload a WAV and then stream you down AACs – disk space is cheap – and I don’t know what they do internally. But let’s assume they’re not. Given it’s Apple, I don’t know what format they’d use on their servers, but it’d probably be some very-low-loss AAC variant, which is very good. But that’s kind of a side question that I bring up only because the “Apple is stealing your music” post author brought it up, as well.)

Now, once they’ve set up the service, with your library’s use rights transferred to the cloud, they will treat all devices as peers, and make them all into echos of the central cloud copy. That’s the clean way to do it; it’s the elegant, least-hacky way. Their architecture is based around the idea that the “primary” machine is their set of servers, and all other devices are thin / empty / stream-on-demand clients. This lets them do really good backups, and provide all the similar cloud-centric services which really are the point of that whole system.

But that means setting all the client environments to be the same and reflect the server, and that’s why it’s set up as it is. (There also may be multiple-copy licensing issues? The RIAA would certainly insist that there are, and this avoids that fight.) All the (thin) clients are in the same state, so all the information is common across all of them, status is always synced, etc. Which means that the local library echos have to match what the server thinks they should be, and there’s no room for exceptions.

It doesn’t have to be that way. They could have – and, to my mind, should have set up exemption rules to avoid exactly this problem. (eta: and at some point after version one in fact did – see below!) And they chose not to (at initial release), because it makes the implementation a lot less elegant if you do that, and/or because the cases where that’s actually an issue are a tiny slice on the edge of their market, and/or because the support costs would’ve been higher, and that’s both inevitable and expensive.

Which of those factors was more important, I can’t begin to guess. I’ve known a lot of managers from Microsoft who would’ve made the same call, and I’d’ve been screaming at them, and probably would’ve lost that fight. Or who knows, maybe I wouldn’t’ve. I don’t know.

What I do know is that the edge-case argument is demonstrably valid. Apple Music has been around nine months. A bunch of us complained about the architecture when it came out; now silence, until this. That’s one new high-visibility blog post about it in three-quarters of a year, which averages out to 1.33 persons angry enough to get it attention about it again, per year.

That’s a pretty small number, particularly given it’s out of 13 million subscribers or so. I may be part of that edge case, but that doesn’t stop it from being an edge case.

Still, ignoring that edge case – and completely blowing up the “least surprise” principle of user experience management – that’s where this was a terrible, nearly Microsoftian design decision. Giving each device the possibility of having a list of first-copy/exempted/whatever songs is, as above, a real technical and support problem. But they could’ve solved it, should’ve solved it, and decided not to.

And that was terrible and leads directly here, and is why I don’t use Apple Music.

But they aren’t “stealing your music.” For the overwhelming majority of users, you already don’t “own” it, you just have transferrable rights. And if Apple wants to offer the service they’re offering, they’re kind of stuck under current copyright law. They just are.

(They could also just back up your old library. But since edge-case people in particular will still add new non-library songs to their personal library while subscribed that means you have to sync the backup as well – yay, more code to maintain! More support to do! – or otherwise, when they quit Apple Music, HEY SOME OF MY SONGS ARE GONE APPLE DESTROYED MY MUSIC!! and we’re right back here.)

The only place I see an even remotely-possible legal issue is that I think they should auto-download all your licensed and owned music without having to go through by hand (as the guy describes in his article as something he doesn’t want to do) when you drop Apple Music. That’s arduous enough that I think you can make a restraint case out of it – particularly for the non-library/actually-owned-by-the-user parts of the library, that edge case that he has and I have and so on.

But the rest of it – the licensed material, meaning all the ‘purchased’ music, none of which you are ever actually purchasing, even if you buy it in physical form – that’s most likely legally solid, and the ground rules are dictated pretty heavily by the RIAA.

Who are monsters. But that’s a whole ‘nother series of articles.
 
eta: Hey, turns out, Apple Music even tries to tell you what it’s about to do and lets you opt out will still using the service for the rest of your library, which means I’m wrong, they do in fact build the exemption list I described above now, which they didn’t in version one. Maybe that was in response to our round of complaints last year! But the wording – while correct – is confusing to many people, like this guy. (And to be fair, it really kinda is.)
 
eta2: From another source, the uploads of your local files are made as 256Kbps AAC.
 


This is a related entry in the Music in the Post Scarcity Environment series of articles about the music industry, and trying to make it as an indie musician in the modern environment.

floppy-disk delay pedal, what?

A Germany company has shipped a delay fx pedal that uses a floppy drive as magnetic media to run its delay. That’s… interesting… and strikes me as likely to be really noisy, but on stage, probably not enough to care.

What makes me think about it more is data rates. Are they floppy-native digital? Are they formatting mp3? If so, 320kbps is very high quality, and the faster floppies managed 500kbps, so we’re good there, and you could ignore FAT and just write a digital data stream at that speed, it’d work.

But what if you intentionally racked that down? I kind of like the idea of intentionally under-quantising your delay pedal. Crank it down to 48kbps or something, have your delay sound like a cranky land telephone line.

Or maybe they’re bypassing the digital part entirely – what does floppy drive sound like as an analogue magnetic media? What do dropouts sound like on a floppy disk?

That would also let you play with different rotation speeds, of course.

Oh wait, look, they have a video. (Scroll down at the link.) Apparently, it’s analogue. That’s fucked up! I kind of like it. But it does lose the possibility of digital data loss, which – depending upon what you’re going for – is kind of too bad. Low data rates combined with this environment could make some really awful/awesome noise.

eta: In comments, John posted a link to this awesomeness, go play that, you need to right now.

shotgun microphone

I really kind of want to make one of these shotgun microphones from an Electronics Experimenter’s Handbook of many years ago:

Look at that thing, is that amazing or what? The frequency range isn’t as wide as it could be, but I don’t even know whether that matters too much in these sorts of applications. It’d be fun regardess! And maybe even actually useful in field recording. So frequency spectrum isn’t what I’m worried about.

I more worry about getting shot on sight by some cop after some idiot calls in a sniper.

I really wish I wasn’t making that up, but I’ve already been warned once that I’m inviting bullet danger with this thing. I’d say maybe I could paint it orange and put a big NERF sign on it, and that might work for me, but it wouldn’t work for everybody I know, because racism fucks everything, and I might, you know, want to loan it out or have somebody else adjust it and who even knows, right?

As impacts of the national-security fear state go, this is a pretty low-grade one, but it still sucks. And this is a case where being a supervillain doesn’t even help, because this is something you’d need to do in civvies, and secret identity blah blah blah why do I even have one if I can’t use it to MAKE FIELD RECORDINGS WITH AMAZING MICROPHONES THAT LOOK LIKE GIANT LASER WEAPONS OF THE 1960s?!

experiments in DIY pickups, part two

A couple of months ago, I built a Zeppelin Labs cortado instrument pickup from a kit. I ended up using it on stage, attached to my octave mandolin with a plastic clamp.

It worked well enough, but needed a fair bit of equalisation, plus there was that whole “giant blue clamp” thing. It also had a fairly metallic sound, which is either good or bad, depending upon what you’re looking for. In this case, that was good, but that’s not always true.

So I had an idea – I’d try to work around all of the above by building a second pickup, with this one’s piezo disc affixed to a hardwood plate. To do that, of course, I’d need a new bridge for the octoman, just so the strings wouldn’t be pushed super-high up in the air by the addition of the plate. Fortunately, those are cheap on eBay.

And now I’ve built it. To wit:


It’s Alive

Installed on the octave mandolin
I was hoping for something akin to the sound I got with the clamp… no. That’s not true. That still had issues. No, I was hoping for the held-down-by-hand sound, the best sound I could get with version one, which I could get no other way, and thus no useful way, since I kind of need my hands to play the instrument. They’re too busy to also press the pickup plate onto the face of the octoman. Hence: this approach.

The result… it’s better. But I didn’t quite get there. I didn’t even get the amount of bass pickup I did with the clamp solution on the first pickup. But what I did get was a more naturalistic sound, and more importantly, a better curve of sound, one that I could get into the area of live sound with a simple single-point parametric equalisation curve.

That curve looks like this. Simple, clean, ignore the red line (unrelated) and the small jagged spikes (room noise):


Simple… but kind of a lot. (+19db peak)
Here’s the riff from “Thirteen,” played back with that single curve added. If you want something in more normal octave mandolin tuning, here’s a short bit of Pirate Bill, played with medium force. I find this instrument really uncomfortable to play in GDAE, so forgive the shakiness. I really don’t like the way the fretboard works on this thing.) No other processing, including compression; those are just the raw recordings plus that one EQ point added.

It’s not where I hoped to get, but it’s pretty good – particularly for live. I think that the clamp – and my fingertip, holding the pickup down directly – has been damping down the high end, the higher frequency sounds. The pickup still needs EQ when I do that, just less, and this has the advantage of being… well, it’s a large shift, but a simple one. That has major advantages in real life.

Part of the problem is, honestly, that these little discs are really sensitive, which is good, but that sensitivity starts falling off pretty hard below 300hz. They still pick up the sound, but not nearly as strongly. That in turn implies that the dampening approach might be best, but that has its own problems, even if the idea of building in some sort of adjustable pressure device is kind of hilarious. And… maybe worth trying anyway, actually. Hm.

Regardless, given that the amount of LOUD in this kit is very goddamn high – it’s very sensitive, with a nice low noise floor – I’m wondering if a low-pass filter in the pickup circuit hardware itself would be the best approach. Sure, you’d lose some signal, but it currently needs so little amplification that a subtractive approach might just be… fine.

After making those recordings, I added some tape to hold down the cord – wouldn’t want to yank that cable off the kit, now would we:

I’ve got one more of these kits, and I want to build a boundary mic with it. And I’m wondering whether I can add such a filter directly onboard. That might be all it needs.

aw yeah radio

Big shout-out to Montco Radio and Amazing Obscura for the airplay today! Maybe it’s a little oldschool of us, but hearing your band named and played on the radio is still 100% totally awesome. \n/

And talking of, the Save KPLU campaign is about halfway through by both calendar and fundraising, and they’re a bit ahead of plan, which is excellent. They have another matching gift campaign going right now – half a million in matching funds, through April 15th.

Indie radio still matters – particularly journalism-heavy stations like KPLU. So if you haven’t jumped in yet to help save KPLU, go on over and do that now. Get that matching grant nailed down!

who was lakeside engineering?

I guess I lied, there is one more stage monitor speaker post, sort of.

I’m still kind of curious about who “Lakeside Engineering, Seattle, Wash.” might have been. Here’s a scan of the logo, off the better old patch panel, now removed. (The worse one had been partly painted over. I’ve saved both, I might add. No good reason, really, but it’s not like they’re big.)

I’ve cleaned up the scan and made the black background solid black again, but I haven’t really altered anything in the logo itself. I even left the scratches, and missed spots in the original silkscreen.

If you know anybody who might know who Lakeside Engineering was, pass this along. I’m mostly just curious, and kind of feel a little like sending someone down memory lane. And if they want to see some of their gear put back into order, just point them at the compilation post.

I’ve re-badged the speakers, by the way:

Because hey – why not?

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