[sdiy] Bit Crunch

[harry bissell]

Be prepared to be surprised... a bit limited system retains an awful
amount of the original data.

I did a hex guitar fuzz with six "Big Muff II" circuits. I expected 
absolute mayhem.
I got something that was barely distorted.  Each string had like 100% 
harmonic
distortion... but with six of them summed the output waveform has six 
discrete
amplitude levels and no IM distortion...

It sounded sweet like a choir or string machine.  Not expected but VERY
expected once you consider how it really works.

I bet even a four bit system retains quite a bit (well four bits) of 
fideltiy

H^) harry

Kyle Stephens wrote:
> "maybe an 8 bit input, but only a four bit output."
>
> Mmm. That kind of downsampling was an idea I had. We
> shall see...
>
> Thanks!
>
>
> --- harry bissell <harrybissell at prodigy.net> wrote:
>
>   
>> Undersampling just gives alias tones... with a fixed
>> (even if variable) 
>> clock you will get more
>> frequency shift or ring-modulator sounds.
>>
>> I'd do what you planned (A/D - D/A) but with the
>> ability to kill lower 
>> order bits selectively.
>>
>> Maybe an 8 bit input, but only a four bit output.
>>
>> If you want to buy something off the shelf that does
>> exactly this...the 
>> Blacet/ Wiard MiniWave
>> is the ticket.  You can make EPROM banks that map 8
>> bit data to 
>> arbitrary output waveforms.
>>
>> H^) harry
>>
>> Kyle Stephens wrote:
>>     
>>> Heylo...
>>>
>>> I'm trying to cook up some bit crunch distrortion
>>>       
>> by
>>     
>>> way of intentionally sampling an anlog input at a
>>>       
>> low
>>     
>>> fequency.
>>>
>>> Is this as simple (eh, understatement...) as
>>>       
>> wiring an
>>     
>>> ACD chip to a DAC chip, with the sample rate for
>>>       
>> the
>>     
>>> ADC turned down low?
>>> I'd ideally like a variable sample rate if
>>>       
>> possible.
>>     
>>> And a belated thank you to everyone who helped me
>>>       
>> find
>>     
>>> me 5 Band EQ-in-a-chip!
>>>
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>
>
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