[sdiy] Axoloti

[Johannes Taelman]

On Sat, Dec 12, 2015 at 10:10 PM, Ian Fritz <ijfritz at comcast.net> wrote:

> However, when I compare to the capabilities of my analog modular system it
> seems to come up short in several important areas.  (With the understanding
> that I probably don't know all Axoloti's features, since the list of
> primitives is a bit vague.)
>

You could install the patcher and explore the object library.

>
> Basically, I would say that what would be helpful for my interests are
> primitives that emulate all the functions available in an analog computer.


Analog versus digital has a different nature: bandwidth is limited to half
the sample rate, aliasing is a concern where non-linearity is involved, and
feedback unavoidably implies delay.


> Useful additions would include
>
> Integrator
> Differentiator
> Comparitor (including output "trigger" signals)
> Window comparator
> Sample and Hold
> Track and Hold
> Diode nonlinear function
> Differential equation solver
>

For example a full wave rectifier could be implemented as a
sample-by-sample function (and there is an object for that), however this
can sound ugly, aliased. Some objects (infinite gain, sample and hold,
rectifiers) offer a more complex approach to generate a less-aliased
output, but at the cost of more load and also response time. The increased
response time may be problematic if used in a feedback structure. But that
is not an easy problem to solve without compromising real time performance.

  Hopefully most of these could be implemented with a good set of
> primitives. Now that would be fun!
>

 Axoloti is an open and expandable framework.
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