Doepfer

Here

http://www.fdiskc.com/syn/


Also, I DONT KNOW WHAT A BIT CRUNCHER does?

Can someone explain briefly, thank you, have a good day...


Alexandre

--- In Doepfer_a100@yahoogroups.com, "bellenger_a" <bellenger_a@...>
wrote:
>
> Here
> 
> http://www.fdiskc.com/syn/
> 
> 
> Also, I DONT KNOW WHAT A BIT CRUNCHER does?
> 
> Can someone explain briefly, thank you, have a good day...
> 
> 
> Alexandre
>

Bit crushing is primarily a form of digital distortion.  Digital audio
consists of discrete values, and the bit-depth of that audio defines
how 'detailed' the signal is over its dynamic range (ie from its
quietest possible level to its loudest possible level).  An 8-bit
digital sample has only 256 possible levels, a 12-bit digital sample
has 4096, and a 16-bit sample has over 16,300. 
If you reduce the number of bits representing a signal, you represent
it more 'crudely' in digital terms, eg with less detail, and this
effectively add a specific kind of distortion which is (conceptually)
like stepped clipping.  This happens because you've reduced the number
of different dynamic levels which the output can be composed of.
Bitcrushing is doing exactly that.

WR

Hi Alexandre


> Also, I DONT KNOW WHAT A BIT CRUNCHER does?
> 
> Can someone explain briefly, thank you, have a good day...
A bit cruncher is not a  established descritpion as "oscillator" or 
"filter" would be.


Usually in the audio context it means a function, that converts digital 
(audio) signals by non audio related, but more logical means.

Example:
A filter reduces partial tones of a signal. This is something, which 
might happen also with natural musical instruments (e.g a damper on a 
violins string)


A simple bit crunching for example can reduce the resolution of a 
digital signal  from 16 Bit to 8 bit; this has nothing to do with a 
musical context and is a plain technical approach, though it hass a kind 
of musical effect (adding overtonal noise to the signal).
Similar the reuction of sampling rate.


An advanced kind of bitcrunching is the exchange of bits in their 
position corrsponding to a certain pattern.

Lets assume a pattern like "move each bit three positions forward round 
robbing".  A byte like 00010000 (which is the decimal value 16) wil 
become 010000000 (which is decimal 128). But a byte like 10111101 (which 
is decimal 188) is converted to 11110110 (which is decimal 246). So the 
same function creates with the first value a change of 112 with the 
second value a change of 58. So the result of this "crunching" is 
nothing which has to do with simple natural processes which could be 
described in "simple" algebra. The results do not sound like a natural 
change.

In fact. most of the advanced "crunching" patterns sound with audio like 
ugly distortion or noise , but in some way a controllable noise; but 
applied to slower changing controlvoltages this crunching might result 
in interesting CV-changes.


Florian

Thanks for your explanation Gentlemen.... I now understand a "bit" more about "bit" 
cruncher

+
A



--- In Doepfer_a100@yahoogroups.com, "whyterabbyt" <sxa@...> wrote:

>
> --- In Doepfer_a100@yahoogroups.com, "bellenger_a" <bellenger_a@>
> wrote:
> >
> > Here
> > 
> > http://www.fdiskc.com/syn/
> > 
> > 
> > Also, I DONT KNOW WHAT A BIT CRUNCHER does?
> > 
> > Can someone explain briefly, thank you, have a good day...
> > 
> > 
> > Alexandre
> >
> 
> Bit crushing is primarily a form of digital distortion.  Digital audio
> consists of discrete values, and the bit-depth of that audio defines
> how 'detailed' the signal is over its dynamic range (ie from its
> quietest possible level to its loudest possible level).  An 8-bit
> digital sample has only 256 possible levels, a 12-bit digital sample
> has 4096, and a 16-bit sample has over 16,300. 
> If you reduce the number of bits representing a signal, you represent
> it more 'crudely' in digital terms, eg with less detail, and this
> effectively add a specific kind of distortion which is (conceptually)
> like stepped clipping.  This happens because you've reduced the number
> of different dynamic levels which the output can be composed of.
> Bitcrushing is doing exactly that.
> 
> WR
>