# Upload Audio

> Upload or provide a URL to an audio file.

## Overview

The Upload Audio node provides a source audio file to the workflow. Enter a direct URL or upload an audio file for use with TTS, lip sync, dubbing, voice processing, or audio mixing nodes.

## Configuration

| Field | Type | Default | Description |
|-------|------|---------|-------------|
| URL | Text input | — | Direct URL to an audio file |

Accepts: MP3, WAV, M4A, AAC formats.

## Inputs & Outputs

**Inputs:** None (this is a source node)

**Outputs:**
- Audio URL — accessible to downstream nodes
## Best Practices

- Use WAV for highest quality, MP3 for smaller file sizes
- Ensure audio is clean and properly recorded for best results with AI nodes

## Common Use Cases

- Source audio for Lip Sync (speech + portrait = talking head)
- Input for Voice Changer or Dubbing
- Audio track for Merge Video & Audio
- Source for Transcribe (speech-to-text)
- Reference audio for voice cloning

## Tips

- For audio from YouTube or video sources, use the Reference Audio node instead
- Connect to Voice Extractor first if the audio has background noise