# Audio and video

> Sonic identity and video production rules.


## Audio identity

Four defined cues. All are short, tonal, and mid-register — the audio equivalent
of "slides into place, doesn't bounce".

| Cue | Sound | Length |
|---|---|---|
| Notification | Short tonal chime, mid-register | 200ms |
| Success | Ascending C→E, warm sine wave | — |
| Error | Single low A2 | 300ms |
| Podcast intro | Ambient pad, tension→warmth resolve | 3s |

Error is a single low note, not a buzz or a descending pair — it marks the event
without scolding.

## Video rules

- **Demos run at real time.** No fast-forward, no speed ramps. If a step is
  slow, that is information the viewer needs.
- **Transitions are a cut or a 200ms fade.** No swoops, wipes, or 3D moves.
- **All video uses midnight surfaces.**
- **Video never autoplays.** Playback begins with a deliberate user action.
- **Subtitles are always available.**
- **Export at 1080p minimum**, 4K when possible.

{{< rules >}}
{{% do %}}
Show the real thing at real speed. Caption everything.
{{% /do %}}
{{% dont %}}
Speed up a demo to hide latency, or use a transition that draws attention to
itself.
{{% /dont %}}
{{< /rules >}}


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Source: https://projectious-work.github.io/brand/v3.0.0/docs/media/audio-video/index.md