> For the complete documentation index, see [llms.txt](https://docs.qolaba.ai/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.qolaba.ai/music-generation/playback-and-configuration-options.md).

# Playback and Configuration Options

#### The Music Player

Every generated track opens in the music player with the following:

**Playback Controls**

* **Play / Pause** — Start and stop the track
* **Skip Forward / Backward** — Jump through the audio
* **Timeline Scrubber** — Click or drag to jump to any point in the track
* **Time Display** — Shows current position and total duration

**Track Information**

* The prompt used for generation
* The model that produced the track

***

#### Synced Lyrics

When a generated track includes lyrics, they are displayed in sync with the audio — the current line is highlighted as the music plays. Click any line to jump directly to that moment in the track.

{% hint style="info" %}
 Not all models produce lyrics. If the selected model does not generate lyrics, the player shows audio-only playback without the lyrics panel.
{% endhint %}

***

#### **Instrumental Only**

Generates music without vocals. When enabled, the model produces purely instrumental output — no singing, rapping, or spoken word.

**Available on:** All models 

**Best for:** Background tracks, ambient soundscapes, cinematic scoring, and any use case where lyrics would be distracting or inappropriate.

***

#### **Format Selection**

Controls the audio file format of the generated output.

| Format  | File Size | Best For                                       |
| ------- | --------- | ---------------------------------------------- |
| **MP3** | Smaller   | Sharing, social media, web use                 |
| **WAV** | Larger    | High-fidelity editing, professional production |

{% hint style="info" %}
WAV is only available on Lyria 3 Pro. All other models output MP3 only.
{% endhint %}

***

#### **Negative Prompt**

Describe what to exclude from the generation — instruments, styles, tempos, or moods you do not want. Available on Lyria 3 Clip and Lyria 3 Pro only.

**Examples:**

```
No drums, no distortion, no fast tempo.
```

```
Avoid brass instruments, no vocals, no reverb.
```

***

#### **Seed**

A number that locks the randomness of a generation, making it reproducible. When you use the same prompt, model, and seed together, you will get the same output every time.

**Use cases:**

* Iterating on a specific result without losing your starting point
* Sharing an exact configuration with a collaborator so they can reproduce your output
* A/B testing prompt variations against a fixed baseline

Leave the seed field blank for a randomized result on each generation.

***

#### **Magic Prompt**

One-click AI enhancement that rewrites your prompt into a more detailed, model-optimized version before generation.

* **Cost:** \~0.05 credits
* **Best for:** Short or underdeveloped prompts