> ## Documentation Index
> Fetch the complete documentation index at: https://docs.oryx.mechatronstudio.com/llms.txt
> Use this file to discover all available pages before exploring further.
# Analog editing
> Connection points, chords, radii and the open-loop warning.
In analog mode the signal is built from two pieces: **connection points** and
the **chords** that join them.
## Connection points
They are pinned to the **divider lines** of the steps. Each one has a normalized
height: **0 = floor, 100 % = ceiling**.
They are static anchors: the chord never moves them. The only thing that gives
is the **corner**, with a radius of its own that rounds the break between what
arrives at the point and what leaves it.
### Two heights on the same point
A point can have a **second height**. With it, the signal reaches the first one,
jumps vertically to the second and carries on from there: that is what lets you
draw a **straight edge without spending two dividers**. Each height has its own
corner radius.
## Chords
A chord is stretched between every two consecutive points. Out of the box it is
a **straight line**. Selecting it lets you grab it at an intermediate point and
pull it up or down.
A chord has three parameters, which are the three controls on the bar:
| Control | What it is |
| ---------- | -------------------------------------------------------------------------- |
| **X Axis** | Where the chord is grabbed: 0 % at the start point, 100 % at the end |
| **Y Axis** | How high that handle is pulled: 0 % floor, 100 % ceiling |
| **Radius** | How much the peak is rounded: **0 % sharp peak, 50 % round, 100 % square** |
The fields take percentages with up to two decimals and apply on `Enter` or when
you leave the field. You can also drag directly over the signal: the chord
handle moves horizontally and the height vertically.
When what is selected is a **point** rather than a chord, the **Radius** control
becomes the point's corner: *0 % sharp, 100 % rounded*.
## The two selection modes
The timeline does two different jobs, and mixing them would make every click
ambiguous, so you pick one with the switch on the bar:
Place, remove and drag connection points; pick chords.
*Edit connection points and chords.*
Select steps to copy, cut, paste or label.
*Select steps.*
## Gestures
| Gesture | What it does |
| ------------------------ | ----------------------------------------------- |
| Click a **divider** | Creates a point at the height set by the Y Axis |
| Click a **point** | Selects it or releases it |
| **Double-click** a point | Deletes it |
| **Drag** | Selects a span |
| Click the **chord** | Selects it, enabling X Axis and Radius |
| `Del` | Deletes the chosen points |
| `Esc` | Cancels the selection |
## Analog mode shortcuts
| Key | What it does |
| -------- | ------------------------------------ |
| `I` | Mirrors the heights of the selection |
| `L` | Labels the span |
| `D` | Adds dividers inside the selection |
| `F` | Shifts the selected points |
| `Insert` | Inserts steps before the pulse |
| `N` | Shows or hides the step numbers |
| `T` | Shows or hides the labels |
The zoom, step, clipboard and channel shortcuts are the same as in digital. See
[Keyboard shortcuts](/en/editor/shortcuts).
## Copying and pasting points
Copying in analog stores **the chosen points along with the chords that join
them**, with all their deformation. When pasting, the header asks you to pick
**the divider** where the paste starts —not the pulse, as in digital— and `Esc`
cancels.
The clipboard is tagged: what you copied in analog cannot be pasted into a
digital project.
## The open-loop warning
Before exporting, the app checks whether each channel **ends at the same height
it started at**. If not, a warning steps in:
> *The signal does not close the loop. The last connection point sits at a
> different height than the first. As the signal repeats, every cycle begins
> with an abrupt jump.*
It lists the affected channels with where each one starts and ends, and offers
two ways out:
* **Skip and export**, if the jump is intentional.
* **Edit signal**, to go back and match them.
Back in editing, **the first and the last connection point each show the other
one's level guide**, so you can match them at a glance.
## Amplitude resolution
A point's height is a number between 0 and 1. It is turned into whole levels
only **on export**, at the resolution you pick: 8, 10, 12 or 16 bits (levels
0–255, 0–1023, 0–4095 and 0–65535).
Sending the signal to the ESP32 works differently: there the curve travels
**already sampled**, because the device DAC plays it sample by sample. See
[Connect the device](/en/device/connect).