Clean is overrated. If you’re ready for a little digital dirt in your synth life, powered by the open-source Arduino hardware, Marc Nostromo’s Squealer is for you. Built atop the wonderful, Arduino-based Pocket Piano kit by Critter and Guitari, it’s a full-blown, simple, digitally-gritty synthesis engine.

You get a monosynth, some fixed waveforms, a resonant filter, decay, and some aliasing tricks for extra grit. The big news: the Arduino Piano Squealer is now under a GPL license.

Official Arduino Piano Squealer Synth Page has everything you need
Announcement of GPL v3
All at Mustalk@noisepages.com

Here’s what it sounds like:

SAP+BOM+Dodgey Eighties Ringing Reverb:
apbom.mp3

Eery piano:
ap-eery.mp3

SAP+Flanging Mini KP:
ardboy1.mp3

Part of the beauty of the iPhone from its launch date was the notion of a Mac you could fit in the palm of your hand. That makes it ironic that, for so many developers, mobile platforms in general have turned into a way to fragment software, to make it run fewer places instead of more. There’s something to be said for designing to a specific mobile device, but on the other hand, how many developers would want to restrict where their creations run? And particularly in music, isn’t the appeal of mobile creation the ability to have your tools work in more places? Maybe targeting just one gadget is the right choice for a given tool, but it shouldn’t be the only choice.

On the iPhone, the application Thump has plenty in common with a range of mobile music making tools. It’s simple but fun, a groove box with sequencing, subtractive synths, drums, and a set of basic effects, plus the ability to load your own samples and export songs.

Thump also demonstrates how simplifying sonic capabilities can produce musically-beautiful results, by focusing on the essentials and creating something with personality. Here’s a track by its creator showing off its sounds:
thump soundreel by mazbox

Well worth checking out the app on your platform of choice:
http://www.mrkbrz.com/thump/

What might not be immediately apparent is that under the hood, Thump makes use of the open source environment openFrameworks. As a result, the same code runs on iPhone, Mac, and Windows, as well as Linux. (It’s not distributed for Linux, but it could be. Hint, hint.) Creator Marek Bereza gives back, too – he ported the openFrameworks audio library to the iPhone, where it’s available to anyone.

Updated Marek notes in comments just what this means. The video below is, essentially, the same app. In place of the iPod screen, he has used a massive lattice of physical controls. A separate installation at the same show used a large touchscreen and simplified interface. And this really demonstrates what cross-platform means. Guy Kawasaki in the 80s mocked “ports” as a cheap wine. The idea is not to simply dump your code on a different platform and hope for the best – in fact, in this case, the changes from one platform to another were radical. The key is maximizing what’s essential, what really is not specific to a single device.

Physical Sequencer from Marek Bereza on Vimeo.

Creative Applications has a detailed write-up of the installation with more documentation.

If you’re interested in creating your own projects, oF has an elegant syntax based on Processing, but adapted to C/C++ coding paradigms and libraries.

I would recommend trying desktop development first as you’re learning, but when you do want to go mobile, setup is absurdly easy:

Setup instructions for iPhone

Having this as a foundation means more freedom for users and developers alike, the ability to run where you want, and a shared community of artists helping one another out. It does not mean sacrificing revenue, either – which is important, because revenue is often what enables (and encourages) developers to make new things. Here, we see a commercial mobile tool and distribution via the iTunes store, with free-as-in-beer distribution of desktop apps. But even the Free Software Foundation actually encourages charging for distribution – and to many people, the FSF is the most extreme example.

The bottom line is, you’re free to create what you want, where you want – and it doesn’t even have to have a price of free.

The use of openFrameworks is possible because the iPhone allows the execution of native code. Apple does not allow the Java virtual machine, which locks out many useful platforms and tools — including Processing. Naturally, that should not be the case with forthcoming non-Apple platforms based on Linux; more on that soon.

Thanks to Memo Akten for the tip — and for his exceptional documentation of iPhone openFrameworks development.

GPU-tiful and Cross-Platform

Updated Another framework I left out is the lovely libnui. The tagline says it all: “C++ API, multiplatform (Mac OS X, iPhone, Win32, Win64, Linux), 3D hardware accelerated GUI and more…”

On the iPhone, Intua’s elaborate Beatmaker software and David Wallin’s bleep!box have both been made with libnui. I want to single out bleep!box because of its UI – note how UI elements are simplified and scaled to the size of your fingertip. That’s something that, speaking of multiple platforms, could be equally important with touch hardware coming to Mac, Windows, and Linux platforms (some of it here already). I saw a huge fan of Windows tablets loving Propellerhead Reason on a tablet. He probably would be less enthused running Reason or Record on a touch interface; the UI elements are way too small.

bleep!box is also worth a look for the same reason as Thump: elegant UI, simple functions, and a lot of fun.

Pd, too

Pure Data, the open source patching cousin of Max/MSP, can also run on mobile devices. It’s currently powering the application RjDj, but because Pd is free, that could be just the beginning. In May, I wrote about the work being done by Hans-Christoph Steiner, who has been porting Pd even to ancient PDAs and iPods – including those, notably, without native floating-point capabilities (the kind of number crunching usually associated with sound).

Well, now Hans-Christoph is looking toward other, current-generation devices, too, kicking off with a workshop on making interactive sound on the iPhone using Pure Data. Here’s a taste:

OK, kids, you won’t believe how easy this is. Once you have Pure Data installed on your your iPhone or iPod-Touch, creating and uploading your own sound-processing and sound-generating patches is as trivial as copying a text file to your device! You’ll still need an Apple Developer License, but because Pd patches are treated as media files, they don’t have to go thru Apple’s elaborate code review — so, you can just dive right in, turning your phone into a pocket synth within minutes. In this 3-hour hands-on workshop, interactive sound whiz and Pure Data developer Hans-Christoph Steiner will lead you through all the steps.

Hans-Christoph will be talking Pd on the iPhone at a conference next month at Carnegie Mellon University in Pittsburgh. That will also include Memo Akten and Zach Gage talking about openFrameworks. And for nearly-entirely open source hardware, there’s a tantalizing-looking workshop combining Android with Arduino, too.

http://artandcode.ning.com/

There’s quite a lot more to say about this, but I hope this whets your appetite.

And, of course, riding the train to Pittsburgh or your nearest university or open source workshop, now you’ll have Thump which which to make some thumping tracks on your iPhone.

Take a weekend, and make something: that’s the challenge behind the Music Hack Day, which joins a growing phenomenon of events built around collective creation. (CDM held its own tangible interface hackday online, which I definitely hope to follow up soon!) Initiated by Dave Haynes of music sharing service Soundcloud, the Hack Day has already hit London. Many of the events were Web app-based and focused on consumption rather than creation of music, but we also saw a chordal synth plug-in and beer bottle percussion instrument.

The Berlin Hack Day, which wound up earlier today, offers still more projects focused on the creation side of music hacking. Having Ableton and Native Instruments as sponsors likely helped the mood. And as you’d expect from one of the world capitals of creative hacking, Berliners don’t disappoint.

Among the projects: a beautiful, elegant 3D sequencer, a fun bird-and-sky multitouch soundmaker with multitouch trackpad input, and a robotic xylophone controlled by monome. Someone even worked out a way to turn NI’s Maschine into a rhythm game, complete with Street Fighter sounds.

I’ve got some of my favorite projects here, but see also an eyewitness report (in English and Italian) at Audio News Room:
Just back from Music Hack Day Berlin
… and keep your eye on the wiki:
Berlin Hack Submissions

xylobot run by monome from robb on Vimeo.

Monomist Rob Böhnke and Ramsey Arnaoot created one of my favorite hackday projects so far: a monome-controlled robotic xylophone. The ingredients: one monome grid controller, one Java application for step sequencing to the output, one Arduino open source controller board, and one terrific xylophone “robot” made of an array of servos that strike the bars of the instrument. Oh, and some hot glue and wood, of course.

Project details

Debugging

Audio loop

Of course, what’s especially impressive is nailing this in just a weekend – imagine what they could do with more time and iterations.

Proof that musical visualizers don’t always have to be trippy, futuristic, Tron-like 3D landscapes (and that’s me speaking as a fan of such things), Gernot Poetsch instead chose a whimsical environment with clouds and cartoon birds, inspired by the graphic identity of Twitter. (No actual Twitter is involved, meaning you lose the, ahem, unreliable, buggy, unfiltered chat network but keep the cutesy happy sky! Works for me!)

The visuals are built in Quartz Composer, which via OSC transmits messages to synthesis language ChucK for noisemaking. The surprise is, the multitouch input is not a Lemur or an iPhone – it’s the new MacBook touchpad under Snow Leopard!

iLoveAcid is a beautiful-looking nodal sequencer by Jakob Penca which uses wireframe “tracks” to guide music playback through a sequencer, transmitting events to your soundmaker of choice via MIDI or OSC. By using curved timelines and connections, it’s a veritable model railroad of music, in which formations combine to form more complex structures instead of simply stepping across a grid. Despite appearances, it is so far only two-dimensional – but then, the z displacement could easily be assigned to some form of modulation. I’m really eager to see the video of this.

One ingredient: Processing, which makes it easier to write visual code and to connect to Java libraries.

Project Page

The hardware controller for Native Instruments’ Maschine software drum machine has been adapted to other software, like Ableton Live. But this is surely the first time it’s been made into a game. Using Maschine’s MIDI output as a game control and sounds from Street Fighter, MaschineFighter is a simple, Simon-style rhythm game. Unlike Simon, though, there’s a twist – instead of rote patterns generated in advance, you face off against a friend and try to out-rhythm each other, battle style. I think it’s actually a pretty brilliant idea, and could become a new sensation for us electronic music nerds – not to mention, it’ll finally test our rhythm in a way electronic performance often does not. (Correction: It is Mac-only, making use of the PYMIDI Objective-C based library, which, since everything else that starts with “Py” usually means Python – a la jThings that mean Java – I assumed, incorrectly, was built on Python. But anyway, if you like the idea, carry on! And, actually, having a pure Objective-C CoreMIDI interface is also pretty awesome.)

Hoping for a video of this, too.

If you have a project that didn’t make this list, or if you add documentation after the fact, let us know.

Sonoridades Líquidas [Liquid Sounds] from Rui Penha on Vimeo.

Wonderful work in sculpting sound into beautiful handmade electronic-acoustical instruments is pouring out of Portugal. Now we get to see more of that work – and if you are in Portugal, you can share in person at a new event.

The Handmade Music project and community has found its second home – Porto, Portugal, at the massive Casa da Música! The first event will be held Tuesday, July 21. (Full announcement, English/Português).

De hardware a software feito em casa até circuit bending, kits personalizados ou instrumentos acústicos originais, todos estão convidados a aparecer na Casa da Música pelas 21h30 para montagem de instrumentos. Pelas 22h abrimos o evento ao público geral – a entrada é livre e recomenda-se -, ocupando a Digitópia e a zona do bar do Foyer Sul. Contamos convosco!

To celebrate the new party, organizer Rui Penha sends over a survey of some of the instruments and sculpture that are being homegrown in Porto. And yes, even first-time-creator high school students can make fantastic work (see after the jump). At top:

An interactive installation made for Casa da Música – Porto, Portugal – with João Ricardo de Barros Oliveira and Luís Girão. Shown here is the algorithmic composition and synthesis patch I made in Max/MSP and the Arduino-based sensor system, co-developed with Luís Girão.

Lula · robotic Hang player from Rui Penha on Vimeo.

This robotic Hang player is called Lula (Squid).
It was, designed, built and its algorithm was created with a group of teenagers participating in a four-day workshop called OrCA – Orquestra de Computadores e Autómatos (OrCA – Orchestra of Computers and Robots), at Casa da Música – Porto.
It was made with picaxe, servos and ultrasonic sensors.

Correntes Sonoras from Serv. Educativo Casa da Música on Vimeo.

João Ricardo constrói instrumentos-esculturas a partir de materiais das mais diversas origens: pedaços de metal, bocados de madeira corroídos pelo tempo, objectos usados e danificados, provenientes de contentores do lixo, da rua, da natureza. As esculturas têm sons complexos, poéticos, muito diferentes do habitual e são um desafio à imaginação, aos sentidos e às convenções daquilo que é um instrumento ou daquilo que é música.

A ExposiSom [Correntes Sonoras] explora diversos espaços da Casa da Música e é concebida como um percurso de descoberta da arquitectura e da relação do som com o espaço que ele habita.

Sonoridades Líquidas from Serv. Educativo Casa da Música on Vimeo.

A ExposiSom [Sonoridades Líquidas] estabelece uma ponte entre a escultura sonora, a música e a arte digital e permite a descoberta do edifício da Casa da Música através de um percurso onde o público interage com o conteúdo sonoro, transformando assim a Casa num mega-instrumento. A ExposiSom [Sonoridades Líquidas] usa um conjunto de cerca de 50 objectos idênticos [esculturas sonoras] que servem de «interface» com um computador. Explora-se a ideia de elicitar sons ou algoritmos que geram som, a partir de um estímulo muito simples: a vibração causada por uma gota de água que cai sobre uma pele de um instrumento de percussão.

We hope to send out some resources for folks working to plan Handmade Music in other places, too. Here’s the running list of locales we know have expressed interest – and yes, I’ll be following up with you folks later today!

• Machester, UK
• (city TBD) North Carolina, USA
• Toronto, Canada
• Argentina
• Chicago, USA
• Berlin, Germany
• San Francisco, USA
• Joinville, Brazil
• Greece
• Los Angeles, USA
• Washington, DC, USA
• Austin, TX, USA
• Detroit, USA
• Boulder, CO, USA

Not on the list and interested in organizing an event? Fill out the form on Google Docs.

Stay tuned for coverage of the upcoming NYC and Portugal events here.

Electronics and code and whatnot are great fun, but a lot of people want to know, how can they add actual, physical motion to a project? I’ve rounded up the last few odds and ends from the London Music Hackday organized in the offices of The Guardian, and came across Alistair MacDonald and Mr. Duck’s Percussion Machine, which uses Arduino with servos to strike beer bottles.

Here’s the perspective of the non-techie on the affair from the newspaper’s music blog:
Beats and geeks at Music Hack Day

Of course, I’ve heard from at least a couple of people that for this audience, you’re not entirely ready to do all your work in the cloud. APIs. Yawn – the computer musician audience still is happiest with as much CPU power as they can muster, live sound making in native code on a local machine, and, you know – rocking out. But that to me is a bit interesting in itself.

Also from the hackday:

While the Arduino is ideal for hard projects, software projects turn to the fuzzy textile-friendly Arduino LilyPad. (Side note: the LilyPad turns out not quite the perfect tool for all occasions, and a discussion of all soft electronics may be what’s next. But it is a good starting point.)

Rain Ashford used the LilyPad to make an interactive felt cat named TwinkleStarduino. Just don’t cross the streams – er, threads: “Yep – all the components are connected by conductive thread – none of these must touch each other or you’ll get a short circuit – which is a challenge in itself :-)”

Rain’s blog post discusses some of the challenges of the project and some of the things that went wrong, which I quite like. (One of the goals I set out for our own music hackday last month was to break s***.)

Musichackday 2009 – my hack: TwinkleStarduino [I like cats]

For fans of RjDj, the interactive music engine for the iPhone and iPod touch, here’s an example of the sort of work you can hack together in a day with the help of patching environment Pd:

ShakeNRoll by ookoi

Lastly, photos by organizer Dave Haynes:

And yes, it sounds like the EchoNest is interested in doing a hackday here in America. And with the help of the site we’re building, noisepages, we definitely plan more hackdays on CDM, too, with a CDM-style focus. Stay tuned.

WalkSX from Gijs on Vimeo.

As the Sony Walkman turns 30, many of the mobile cassette’s fans wax nostalgic. But it takes Gijs Gieskes to wire up a new Rube Goldberg-style musical instrument based on the Walkman’s simple tape playback.

Follow along carefully through the signal flow of this unusual instrument:

1. The Walkman has audio on the tape itself, sampled from a Roland TR-808 drum machine.

2. Because a compact cassette has two tracks (left and right, for stereo), one track is dedicated to the drums, another to the rim shot.

3. The rim shot track is fed as a mono audio input to an Arduino (the open-source microcontroller platform). The Arduino responds to the audio level, so each time a rim shot hit occurs, it ….

4. …sends a sequence event to the Gakken SX-150. That means that you can adjust the speed of the whole contraption by…

5. …adjusting the speed of the tape. (Bless you, analog playback!)

It takes Gijs to think that way somehow: put together, these elements are actually fairly simple, but strikingly effective. Fortunately, if this does inspire new ideas, Gijs has posted all his Arduino code, so you can check this out and try something yourself.

http://gieskes.nl/instruments/?file=walksx

Design in music in a digital world can be about the object as the sound – musical ideas translate from one medium to many others. And just when you think you’ve seen it all, someone comes up with a new visual metaphor, a new creation for manipulating music.

OTTO is a functioning prototype combining interactive hardware and computer software, the invention of Luca De Rosso. He produced the design as a thesis project for his masters’ degree in Visual and Multimedia Communications at IUAV University of Venice. It uses the Arduino open source hardware platform and Cycling ’74’s Max/MSP software, and Luca accordingly is quick to credit the assistance of those two communities. In that sense, two, I think it points to lots of new design in the field of integrated hardware and software – not just standalone hardware or standalone software or generic controllers for anything, but hardware that itself behaves like software.

All photos here courtesy Luca and used by permission; see his Flickr account.

OTTO ~ demo.01 from Luca De Rosso on Vimeo.

Luca sends along some more details of the behind-the-scenes workings just for us. (Thanks, mate!)

Luca actually had assistance from his father working on the case. (I love that – father-son collaboration!) All the electronics are on a single Arduino board, and the patch works in Max. (Max has features that make it well worth using, but it’d be nice to see a Pd port, too, making the whole setup open source – and giving you an easy way to run it on Linux.)

OTTO ~ Getting Started from Luca De Rosso on Vimeo.

Luca sends us a view of the innards of this device – you saw it here first:

The first prototype is done, says Luca, with three more coming in coming days as he heads to a festival in Croatia. Plans for the future: no commercial availability yet, but Luca says he’d be happy to hear from anyone interested in manufacturing. (Capital remains the big challenge, even as fabrication gets easier.)

I also love the way he’s designed the documentation. Music tech industry, please, this is how it should be done – with all due respect and without naming names, we really would love if you just showed us your gear and didn’t have some swarmy dude gushing about lots of hype. In fact, we’d be equally happy to buy your gear if the design spoke for itself rather than having your name and circuit diagrams and random text plastered all over it.

But this is really visually inspiring, creative work. And to top it off, it looks insanely fun to play. Putting the beats in a circle opens up all kinds of other possibilities, and suggests thinking in terms of cycles rather than the grids we see on other hardware. As with the monome, you can imagine other software applications that would hook into this basic, minimal hardware design. I hope we see more of this design and concept.

http://www.lucaderosso.com/otto/otto

More videos:

OTTO ~ demo.02 from Luca De Rosso on Vimeo.

OTTO ~ demo.03 from Luca De Rosso on Vimeo.

A $50 synth that makes neat noises is fun. But a $50 synth that has a proper housing, audio jacks, and can be MIDI controlled — that’s a whole lot better. So readers were wowed last week as we saw the work MrBook did with his Gakken SX-150.

Now, by popular demand, MrBook shares his techniques with specs, instructions, and code. This isn’t a bad project to get started with if you’ve been thinking of doing something on these lines.

The basic ingredients and process:

• Find the connections on the synth for audio and control, using contact points on the board
• Build a simple circuit that adds MIDI input (control) and audio output – schematic on his site. It’s not a tough circuit at all — this could be fun soldering practice.
• Add the Arduino, the open source, dirt-cheap, accessible microcontroller project board, and some code MrBook has written for you.

That should be fun even for relative newcomers – provided you have basic soldering chops. If you want to get more advanced, there’s room to modify the Arduino code to do fun stuff, or, as MrBook is doing, add a standalone Arduino sequencer or the like to drive your synth in hardware alone. (While I’m still on a crusade to do OSC for stuff that talks to computers, I think MIDI should absolutely be used for what it’s good add – connecting hardware.)

You can also have some fun with the casing. (Someone needs to mod the drab colors on the Gakken, too, I think.)

If you do a project and document it, do let us know! And we’ll be watching for more from MrBook.

You can get your SX-150 kit from our good friends at MAKE. (Nope, I’m not getting any cash for saying that. Hmmm… okay, I need an affiliate account, don’t I? Make?)

SX-150 synth mod instructions, schematics and code [MrBook]

Artists Gijs Gieskes’ sequencers are almost like physical, mechanical software, an expression of musical structure in object form. As such, even as they make strange sounds, they become musical sculpture. His latest Servo Sequencer combines optical and mechanical process, as frequency circles spin on a turntable and tone arms float above them.

The Servo Sequencer is built for exhibition use – meaning, yes, he’s brave enough to let you play with this contraption. Sequence the arms using buttons, then adjust the volume mix and placement of each arm using the joystick.

Serv Seq from Gijs on Vimeo.

This project is unusually well-documented. Gijs provides complete specs, the script that controls the arms, and even a little web app that generates those lovely patterns.

http://gieskes.nl/instruments/?file=serv-seq

But for those of you near the Netherlands, you should go check this out in person. Updated: The piece will be part of an exhibition in Breda through August 23, with multiple opening events featuring local artists from Eindhoven and Breda, plus live performances and concerts including Gijs and his talented brethren and neighbors.

Here & There Exhibition, mu.nl [Info in English]

The events:
Opening Part 1:
KOP, Breda
Thursday 25/06 08.00 pm

MU, Eindhoven
Friday 26/06 08.00 pm

(It’s a bit confusing as the events swap between Breda and Eindhoven — there’s a second opening Saturday July 25. Gijs explains “the first [opening] is in breda (thursday), then a day later (friday) in eindhoven, where my machine will be. and then a month later its the other way around.”)

You know, Breda. Like, right … here. We’ve got a number of readers in the area (whom I suspect know more or less exactly where this is); let us know if you make it!

What happens when you put all the digital and electronic tools you love together into one groove session? I expect it probably looks something like this video. Welcome to the new digital music age: DIY electronics, vintage digital tech (Game Boys), and modern computer tech (Monome as Arduinome clone, Max/MSP, and shiny MacBook) all coexist. And a fair bit of what you see if a modern hybrid of old and new paradigms, like the thoroughly modernized Tracker Renoise. Thomas Margolf says “Greetings from Rotterdam” and writes,

We made a first Jam using the new GorF step-sequencer, Arduinome, max msp patch ‘Soyuz’, a Gameboy running LittleSoundDJ, LSDJMC2 Gameboy Midi-Interface, Renoise, Ableton Live and a Nord Micro-Modular. It’s the first session with a fresh soldered GorF.

Lovely stuff. Keep on soldering and jammin’, folks. Okay, tagging this story is going to take … a lot of tags.