8 bit sounding builds?

[carboncomp]

Hello!

looking for a really square wave gated 8bit sound, something like a stripped back bluebox

[Taylor]

Square waves are actually only 1 bit.

Earthtonesaudio and I did some actual bit crusher type circuits in this thread:

http://www.diystompboxes.com/smfforum/index.php?topic=89353.0

[carboncomp]

interesting thread, could see any audio clips though?

Was wondering if there was a reversed process to using voltage divider and Digital to Analog Converter to change the wave into a more then just a 1 or 0, but a staggered waveform?  

[Gurner]

Square waves are actually only 1 bit.

Earthtonesaudio and I did some actual bit crusher type circuits in this thread:

http://www.diystompboxes.com/smfforum/index.php?topic=89353.0

I think he probably means using a square wave to 'gate' 8 bit sampled audio.

Edit: Oops posted at the same time as the post above!

[CynicalMan]

http://www.diystompboxes.com/smfforum/index.php?topic=40860.0
http://experimentalistsanonymous.com/diy/Schematics/Fuzz%20and%20Fuzzy%20Noisemakers/Analog%20Bit%20Crusher.gif

[solderman]

Hi
I ones made a crasy sounding thing that i called Donkey Kong. Don't know how many bits it sounds like but look for it here and you will find sound samples as well.

http://solderman.fatabur.se/Mini_effects.html

[nexekho]

I made an 8-bit-like distortion called the Woodchopper by using diodes in the signal path AND to clip so you get three positions.
http://soundcloud.com/nexekho/who-says-you-need-a-midi

[nexekho]

http://soundcloud.com/nexekho/more-tests
A better sample from after I boxed it up and I could actually see what I was doing

[ugly_guitar_guy]

Hi
I ones made a crasy sounding thing that i called Donkey Kong. Don't know how many bits it sounds like but look for it here and you will find sound samples as well.

http://solderman.fatabur.se/Mini_effects.html

Hey solderman, do you have any build info for the Donkey Kong?

[slacker]

http://experimentalistsanonymous.com/diy/Schematics/Fuzz%20and%20Fuzzy%20Noisemakers/Digital%20fuzz.bmp Doesn't just sound 8 bit, it is 8 bit, search for digi fuzz or digital fuzz for other examples.

[solderman]

Hi
I ones made a crasy sounding thing that i called Donkey Kong. Don't know how many bits it sounds like but look for it here and you will find sound samples as well.

http://solderman.fatabur.se/Mini_effects.html

Hey solderman, do you have any build info for the Donkey Kong?

Well. I cant find any project file that expains exactly what i have done but most of it you will find here 

http://www.diystompboxes.com/smfforum/index.php?topic=64752.msg632244#msg632244

[nexekho]

http://experimentalistsanonymous.com/diy/Schematics/Fuzz%20and%20Fuzzy%20Noisemakers/Digital%20fuzz.bmp Doesn't just sound 8 bit, it is 8 bit, search for digi fuzz or digital fuzz for other examples.

Funny thing is though, when people say 8-bit, they're referring to the generation of games consoles with 8-bit CPUs, not the sounds/graphics themselves, in particular the NES.  I don't know for certain but I believe the waveforms created are just simple analogue oscillators.  If you want an 8-bit sound, you've got to simplify your wave.

The NES board supported a total of five sound channels. These included two pulse wave channels of variable duty cycle (12.5%, 25%, 50% and 75%), with a volume control of sixteen levels and hardware pitch bending supporting frequencies ranging from 54 Hz to 28 kHz. Additional channels included one fixed-volume triangle wave channel supporting frequencies from 27 Hz to 56 kHz, one sixteen-volume level white noise channel supporting two modes (by adjusting inputs on a linear feedback shift register) at sixteen preprogrammed frequencies and one differential pulse-code modulation (DPCM) channel with 6-bit resolution, using 1-bit delta encoding at sixteen preprogrammed sample rates from 4.2 kHz to 33.5 kHz. This final channel was also capable of playing standard pulse-code modulation (PCM) sound by writing individual 7-bit values at timed intervals.[59]

[WhenBoredomPeaks]

While we are at game consoles the 8-bit/chiptune bands that were "in" a few years ago were pretty much came to life because of this:



Sadly the 8bit/chiptune fad ended and maybe it is harder to get a SID chip nowadays.

[tiges_ tendres]

While we are at game consoles the 8-bit/chiptune bands that were "in" a few years ago were pretty much came to life because of this:



Sadly the 8bit/chiptune fad ended and maybe it is harder to get a SID chip nowadays.

Not too hard to replicate though:

http://www.arduino.cc/playground/Main/SID-emulator

[DC9V]

Try the Thing-A-Ma-Bob -- a very simple circuit that gives good results if you're after NES-like sounds.