Computer sound on your phone
Take films, calls, music, and everyday computer sound with you around the room.
Your phone as complete PC peripherals
Speaker, microphone, and webcam. All at the same time.
Turn your phone into ultra-low latency PC peripherals for Mac & Linux. Stream speaker audio, mic input, and webcam simultaneously — under 10ms over USB, and ~15ms average over Wi-Fi.
CastSound
Useful in seconds, invisible when it works
Open CastSound on both devices, choose your computer, and get back to your call, film, music, or work.
Phone microphone on your computer
Use the microphone already in your pocket for calls, classes, and conversations.
Phone camera on your computer
Show up in meetings and streams with the camera already in your pocket — no extra hardware.
Use cases
Built around the devices you already have
Product comparison
CastSound compared, feature by feature
| Feature | CastSound | AudioRelay | SoundWire | WO Mic | SonoBus |
|---|---|---|---|---|---|
| Platforms | |||||
| macOS app | ✓ | ✓ | — | — | ✓ |
| Linux app | ✓ | ✓ | ✓ | ✓ | ✓ |
| Windows app | Not yet | ✓ | ✓ | ✓ | ✓ |
| Android app | ✓ | ✓ | ✓ | ✓ | ✓ |
| iPhone and iPad app | ✓ | — | — | ✓ | ✓ |
| What you can do | |||||
| Listen to computer audio on your phone | ✓ | ✓ | ✓ | — | — |
| Use your phone as a computer microphone | ✓ | ✓ | — | ✓ | — |
| Use your phone camera as a computer webcam | ✓ | — | — | — | — |
| Simultaneous speaker, mic & webcam | ✓ | — | — | — | — |
| Connect over USB | ✓ | ✓ | — | ✓ | — |
| Use several devices at once | — | ✓ | ✓ | — | ✓ |
| Distribution | |||||
| Free option | ✓ | ✓ | ✓ | ✓ | ✓ |
| Open source | — | — | — | — | ✓ |
Guides
From download to connected in three steps
- 1
Install CastSound on your computer and phone.
- 2
Keep both devices on the same Wi-Fi network.
- 3
Choose the device you recognize and connect.
Download CastSound