---
title: Signal list
description: |
  Each node should define a list of signals which it receives.

  There are three ways to specify the input signals of a node:

oneOf:
- type: array
  title: List of signal definition objects
  items:
    $ref: signaldef.yaml

- type: object
  title: Signal definition with `count`
  allOf:
  - $ref: signaldef.yaml
  - type: object
    required:
    - count
    properties:
      count:
        type: integer
        minimum: 1
        default: 64

- type: string
  title: Signal format string
  example: '64f'
  description: |
    The easiest way to specify the signals, is by using a format string.
    The format string consists of one ore more characters which define the type for the signal corresponding to the position of the character in the string.

    | Character | Type                   | Setting for full and list mode |
    |:---       |:---                    |:---                            |
    | `f`       | Floating point         | "float"                        |
    | `b`       | Boolean                | "boolean"                      |
    | `i`       | Integer                | "integer"                      |
    | `c`       | Complex Floating point | "complex"                      |

    Optionally, the characters can be prefixed by an integer for easier repetition.

    **Example:** `12f3i` defines 15 signals, of which the first 12 are floating point and the last 3 are integer values.