As if game boy music isn't hard enough to explain already, trash80

Excellent work! You, too, Rolf.

It's mono but you cant really tell, the drum samples are tiny. 4bit sample player & sample osc & pwm synthesizer with filter... I'll be releasing the code at some point, once its working nice.

Trash80's synth has some better drum samples, 4bit depth 22100Hz.
I've also messed around with 8bit samples at about 15KHz being played using the hardware pwm at 62.5KHz but they ate space very quickly.

I hope for something a ltitle more advanced then:

Currently, the code contains four drum sounds (kick, snare, hi-hat and cymbal). More sounds can be added easily. Each sound is 128 samples long with a depth of 8 bits. The samples are stored in separate arrays. Thus, the present sketch is only 3228 bytes long.

But it does look cool!

oh but there is!

http://little-scale.blogspot.com/2008/0 … chine.html

Personally I dont like the quality of pwm as dac. but that is due to aliasing on high notes. which wouldnt be a problem if you did some interpolation magic. but, that is kind of hard on the arduino due to processer intensity. I would imagine this same problem exists with using a external dac as well. Unless you're running at a very high sample rate (well above 44.1khz)

I use a r2r dac and run the interrupt at the proper rate to create pitch, which restricts it to monophonic and uses 4 pins for 4bit.
Lame restriction but the quality is quite nice for notes- pure 4bit oscillator- no aliasing, no lowpass filter to kill the high pitch tone generated by the pwm at the frequency of the sample rate.

Yes it can.
The quality is quite good and the amount of voices.. I'm not sure.

That touches on a related question I've been wondering about:

If timers and interrupts are used, could the Arduino be used to directly synthesize PWM oscillator waveforms?
Is this how some people are already doing it?

(To try and be clear, I'm not talking about putting samples through an A/D at 44kHz, I'm talking about directly toggling output pins at varying frequencies and duty cycles, using the 16MHz clock as the fundamental timing source; i.e. more similar to NES or C64 pulse wave generation.)

How many voices and what quality would be doable?

So this is what I came up with (for now). I'm planning to add 4bitsynth to this too.

Mp3:
http://soundcloud.com/dkstr/mantra-test

Mantra is Pure Data based 8 step sequencer combined to Arduino based synth.
Sequencer has:
-One synth channel
-One gated channel of same synth
-Bass generator that gets the pitch from the synth
-3 Drum channels
-Arpeggio-like channel
-In addition one synth is routed to Ableton Live to create ambience

Synth is based on Auduino.

Hmm, does anyone know is doing midisyncing hard to implement to simple sequencer like this:
http://www.beavisaudio.com/Projects/dig … nkConsole/

Yeah, I take it more as a learning about building stuff, but the demos I've heard have sounded pretty nice to me.

But now the bending with midi controls sounds the most interesting choice. Doing bending 'sequences' sounds pretty cool.

There was a guy at a soundbytes open mic once, that played this arduino synth. It sounded awesome.

Making good audio with the arduino isn't really possible unless you plan to use one of the timer interrupts and make it faster.

MIND IS BLOWN!

Yikes, very cool! I can't wait to see/hear more.