# Gain

> A clean multichannel gain stage.

Source: https://docs.tune.toys/nodes/std.gain/

Gain multiplies a signal by a number. It is the simplest way to turn something up or down.

## What it does

Every channel of the incoming audio is multiplied by Level. A level of 0 is silence, 1 leaves the signal unchanged and 2 doubles it. Gain changes only the level: it adds no tone, delay or filtering. The change is smoothed so moving the control does not click.

## When to use it

Use it to trim a loud source before an effect, to set the final level of a Toy, or as the node you expose as a master volume. To combine several signals use [Mixer](https://docs.tune.toys/nodes/std.mixer/); to blend two use [Crossfade](https://docs.tune.toys/nodes/std.crossfade/).

## Ports

<!-- ports:start -->

| Port    | Direction | Signal | Lanes                   |
| ------- | --------- | ------ | ----------------------- |
| `audio` | Input     | Audio  | Inferred from the cable |
| `audio` | Output    | Audio  | Inferred from the cable |

<!-- ports:end -->

## Parameters

<!-- parameters:start -->

| Parameter | Label | Range  | Default | Unit   | Scale  | Notes                                                                                |
| --------- | ----- | ------ | ------- | ------ | ------ | ------------------------------------------------------------------------------------ |
| `level`   | Level | 0 to 2 | 1       | linear | linear | Multiplies every audio channel. 0 silences the signal; 1 leaves its level unchanged. |

<!-- parameters:end -->

### Level (`level`)

The multiplier applied to every channel, from 0 to 2. Values above 1 boost the signal and can push the output past full scale. Put a [Limiter](https://docs.tune.toys/nodes/std.limiter/) after a boost you cannot avoid.

## Tips

- Gain is linear, not decibels. Halving the value is roughly a 6 dB cut.
- A gain of 1 is a good default for a pass-through node you plan to expose later.
- Gain works the same on mono, stereo and larger bundles.

## See also

[Mixer](https://docs.tune.toys/nodes/std.mixer/), [Crossfade](https://docs.tune.toys/nodes/std.crossfade/), [Limiter](https://docs.tune.toys/nodes/std.limiter/).