Oooh quite interesting, i’ve got to look into this some more.

Same fellow here…Oops.

I need to poke around websites more. Upon further review, looks like he’s using a transistor as a buffer. Still a bit goofy…but it makes a little more sense (in a cheesy sort of way.)

is there not a video of this in action, or am I just blind?

Of course, after actually reading his website, I learned that five separate speakers is actually a requirement for his project, not a lack of ability to mix the audio.

Osgeld, it’s called critical reading skills and social awareness. please look into it and ask your doctor about aspergers.

The end project looks pretty interesting and actually based on music theory! I can’t wait to see the results and the cooperative behaviors that emerge around it to see people exploring the musicality of it.

Omg, I was just thinking about this like 2 days ago lmao. I wish I had an arduino for things like this because I am a guitarist and I like to play around with effects this cuts the need for a pc and only for the board it self.

I lack the free time to learn how to program :\

Osgeld is correct. Simple passive mixer, get rid of the dumb speakers. Duh.

No offense, but this has been done before. Maybe not on an “arduino” (lol) but that’s irrelevant… I fail to see how this is post-worthy in its current state.

Then again for eight bucks you can use a Parallax Propeller (or if your’re really an Arduino addict sign up for a PropDuino so you can use your shields) and then you can just run the same single-channel PWM in five cogs. Ten minute project. The sine table is even in the ROM.

I jumped the gun, Osgeld isn’t the asp of this thread. (and yes I was being a dick, though I don’t think my post was completely devoid of merit)

It’s a smart piece of artwork and good technical problem solving. skills.

The separate speakers has a lot of potential in an installation. A pentatonic scale has a lot of harmonic overlap so the way the waveforms are being generated are going to be phased in ways that will distort and overlap in a very natural way that will sound really different on where you stand by the piece. Also because we have 2 ears and brain is really good at locating where a sound is coming from it will be much more interactive and engaging to explore the possibilities than mushing the sound into one speaker.

It is the same reason in recording a nice amp and a good sounding room are used in recording instead of direct to board. It defines the sound in ways that let stand against or support other instruments.

We managed 3-note polyphony, with wavetables and ADSR envelopes, playing on an Arduino (with a 328):

http://code.google.com/p/pisanomatic/

And yes, you can wire a speaker directly to the PWM output pin on an Arduino. It isn’t very loud, but the Arduino survices.

A bit of a tangent post but here is something that impressed me : http://www.pic24.ru/doku.php/en/osa/articles/pk2_osa_piano
a Polyphonic piano with touch sense of 36 keys(!) using a 16f88. I did not think the pic had the ability to detect so many keys via touch as well as it does, and only expect chirps out of the device.

This has been done for awhile now (sort of) youtube bassdll and you will see one that uses 3 peizo speakers to make a nintendo like tune