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]

Via Collin Cunningham at MAKE, MrBook has a lovely rig with a modified Gakken SX-150, the synth kit that sells for US$50 in the States and has even been seen as a free add-in with Japanese magazines. He’s added MIDI control and a digital audio converter, and put it into a housing, which makes for a quite-playable instrument.

Really terrific work! Of course, a few thoughts:

• We need an OSC-compatible synth. (Anyone out there?)
• I love you, Live, but this looks like a perfect job for Numerology (for its modular sequencing) or Renoise (for tracking).
• Looks like more controls would make this even more self-contained.

Gakken sx-150 arduino hack number two: Adding MIDI and Audio out

If you have synth projects like this, we’d love to see them.

Interested in experimenting with MIDI, minus the wires? Why not try a DIY hack yourself? Limor Fried aka Lady Ada of Adafruit Industries has posted a detailed tutorial on transmitting MIDI over the inexpensive and relatively friendly XBee wireless module.

It’s a bit of a hack – you force the XBee to communicate at MIDI baud rate, and on Windows, at least, you have to fool the OS into using MIDI’s non-standard baud rate for serial communications. But it seems to work. That’s where you come in: Limor’s got some folks testing this, but we could use some additional real-world tests and a “port” of the instructions to Mac OS and Linux. (I’ll be testing, too, once I get my hands on some spare XBees.)

Tutorial: Using XBees to create a wireless bi-directional MIDI link [ladyada.net/make]

HOW TO – Using XBees to create a wireless bi-directional MIDI link [adafruit blog]

Ingredient list:

Wonderful things happen when you invite lovers of noise together in a room. Musicians and non-musicians, electronics geeks and first-timers, folks pick up a soldering iron — often for the first time — and cause utter mayhem. So we again had a fantastic time at Handmade Music last month. I’ve just gotten the photos in, so decided to share.

We’re looking for folks to bring stuff to Handmade Music on 4/16 – see the bottom of the article and give us a shout if you have software or hardware creations to share. They don’t even have to work, entirely – this is the place to find people to help give advice, so we like even partly-functioning inventions.

Even if you live far, far from Brooklyn (like back in Old Amsterdam), the featured March projects are within reach:

• Loud Objects Noise Toy was the star of the evening. Lesley Flanigan and Tristan Perich of Loud Objects — superstar composers and sound artists themselves — were onhand as patient teachers and guides in the ways of Noise.
• glitchDS on PC and Mac: The DS homebrew creator Bret Truchan delighted with not only his mobile gaming creations, but a netbook running a new PC cellular automaton MIDI sequencer, ported to Processing. More on that soon. (See the image captured by Make Magazine’s Collin Cunningham.)
• Pulsantes I got Jaime Munarriz’ strange Processing + Pd pulsating rhythmic toys working on a PC – thanks, Jaime, for the virtual contribution!
• jReality Peter Brinkmann demonstrated the sonic capabilities of audiovisual virtual reality framework jReality. Intense stuff – you don’t even need to use Cartesian coordinates. Elliptical, baby!
• Networked Objects: Eric Beug brought by his DIY wireless synth modules and an iPhone for control. This progress is under development, so I hope it makes a repeat visit.

By the way, in case you wondered what happens when a bunch of people play all their newly-built Noise Toys at once? It sounds something like … this (and sorry, my digicam mic was entirely incapable of capturing the resulting sonic chaos):

Maker Profile – Computer Making Music on Make: television from make magazine on Vimeo.

Make:Television has done a really lovely piece on CCRMA, the research center at Stanford University that works on problems ranging from acoustics and sound to musical instrument design. CCRMA is really just one microcosm of the whole music tech making scene around the world – a lot of increasingly beyond the walls of academia. But what a microcosm it is: I don’t think it’s understatement to say this is just the kind of institution a lot of us dream of. Among the highlights from the MAKE video that I could pick up:

• Ge Wang, professor and creator of ChucK programming language and certain popular ocarina-themed iPhone apps, and Stanford Laptop Orchestra director
• Carr Wilkerson: Electronic “Rub Board”(?) with a nice accompanying Pd synth patch
• A very nice Max/MSP app that everyone seems to be using for signal analysis
• Edgar Berdahl: a one-handed drum that “hits back”
• Nicholas Bryan building the legendary hemispheric speaker (incidentally, no one seems to be able to tell me who invented that)
• A giant interactive musical playground, with a Wii-powered teeter-totter (with one somewhat silly patch, and then another very lovely bowed-sounding patch)

Thanks to patospurlock on Twitter for the tip. I know at least some of you CCRMA students read this site, so feel free to chime in and identify your colleagues.

The featured Feedback Piano project is a hybrid with a bit of acoustical design (a piano), electronics/recording (mics), and digital/computer design (the Max patch that completes the circle). The results are really striking, and while it’s a lot less portable than a convolution reverb, it’s certainly very different having an actual piano into which you can play your saxophone.

Make followed up with directions on the Feedback Piano (please use a truly broken piano, thanks!) and we’ve got some video, as well: