# Sample & Hold

A Sample & Hold virtual circuit that reads an input in real time (external or internal) and takes a "snapshot" of this input whenever it receives a trigger signal. This snapshot is a fixed value that will be output until a new "snapshot" is taken.  
  
On any page of the S&H modulator, a visual display provides a rough outline of the source signal and the sampled value.

#### Main screen of the Sample & Hold modulator

[![screenshot_001.png](https://nanopolis.storage.googleapis.com/uploads/images/gallery/2025-03/scaled-1680-/zsTscreenshot-001.png)](https://nanopolis.storage.googleapis.com/uploads/images/gallery/2025-03/zsTscreenshot-001.png)  
On the real-time chart displayed on the screen, the input source is shown in a faded background, while the sampled output appears in black.

The trigger parameter has a small indicator that lights up whenever a trigger signal is received.

#### S&H Tab

This section allows you to configure the basic parameters for the Sample & Hold:

<table border="1" id="bkmrk-sync-phasemod-----ab" style="border-collapse: collapse; width: 100%;"><thead><tr><th>Source</th><th>Trigger</th><th>-</th><th>-</th></tr></thead><tbody><tr><td>The signal to be sampled can be internal noise, any CV input, modulators from any voice or global sources, Macros, or even any Voice output. Additionally, it includes a selection of MIDI parameters such as Velocity, Key Follow, Aftertouch, and ModWheel.</td><td>The S&amp;H can be triggered by any of the Gate inputs, the Voice trigger, or various divisions and multiplications of the MIDI clock.  
  
A small dot indicator will activate each time a trigger is received, signaling that a new sample has been taken.</td><td>-</td><td>-</td></tr></tbody></table>

#### Output Tab

This section allows you to shape the S&amp;H signal before it is sent to modulation targets:

<table border="1" id="bkmrk-polarity-gain-----se" style="border-collapse: collapse; width: 100%;"><thead><tr><th>Polarity</th><th>Gain</th><th>-</th><th>-</th></tr></thead><tbody><tr><td>Select the polarity of the S&amp;H signal:

- Bipolar
- Unipolar Positive
- Unipolar Negative

</td><td>Adjust the level of the S&amp;H signal. This parameter can be modulated.</td><td>-</td><td>-</td></tr></tbody></table>