What is Audio Interface?
An audio interface is a hardware device that connects microphones and instruments to your computer for recording. It converts analog audio signals from your microphone into digital data your computer can process, and converts digital playback back to analog for your headphones or speakers.
For podcasters, an audio interface serves as the hub between your XLR microphone and your recording software. Key components include:
- Preamps: Amplify the weak microphone signal to usable levels
- A/D Converters: Transform analog sound waves into digital audio
- Headphone output: Monitor your recording in real-time
- Phantom power: Powers condenser microphones
| Interface | Inputs | Best For | Price |
|---|---|---|---|
| Focusrite Scarlett Solo | 1 XLR | Solo podcasters | ~$120 |
| Focusrite Scarlett 2i2 | 2 XLR | Co-hosted shows | ~$180 |
| MOTU M4 | 4 inputs | Multi-guest podcasts | ~$250 |
| Universal Audio Volt 476 | 4 XLR | Premium quality | ~$400 |
Why It Matters
An audio interface dramatically improves your podcast audio quality compared to USB microphones or built-in computer audio. Dedicated preamps provide cleaner gain with less noise, better converters capture more detail, and XLR connections give you access to professional microphones. If you're serious about podcast audio quality, an interface is essential.
How to Use This in Dispatch
Connect your audio interface to your computer via USB (or Thunderbolt for high-end models). In your DAW or recording software, select the interface as your audio input device. Set the gain using the interface's knob while monitoring levels—aim for peaks around -12dB. Most interfaces include direct monitoring (hearing yourself without latency) via a "direct" or "monitor" knob.