Starting a Whisper Call
From the Member Action Sheet
Open Members Drawer
On the PTT screen, tap the people icon to see the member roster.
Tap a Member
Tap the member you want to call. The Member Action Sheet slides up.
Tap Whisper
Tap the phone icon (Whisper) button in the action sheet. The call request is sent.
From Quick Action Icons
Member rows in the roster show inline quick-action icons. Tap the phone icon next to any online member to start a Whisper call directly — no action sheet needed.
Whisper calls require both users to be online. The phone icon only appears for members who are online and not already in a call.
Receiving a Whisper Call
When someone calls you:
- A full-screen incoming call screen appears
- The caller's name and avatar are displayed
- Your device vibrates to alert you
- You have 30 seconds to respond before the call auto-declines
You can:
- Accept — Tap the green accept button to connect
- Decline — Tap the red decline button to reject the call
During a Call
Once connected, the Active Call Overlay appears at the bottom of the screen:
- Minimized view — A compact bar showing the call duration and remote user name
- Expanded view — Tap the bar to expand, showing mute controls and end call button
Call Controls
| Control | Function |
|---|---|
| Mute | Toggle your microphone on/off |
| End Call | Disconnect the call |
| Expand/Minimize | Toggle between bar and card view |
PTT During Whisper
While on a Whisper call:
- The PTT button shows "IN WHISPER" and is disabled
- You cannot transmit on PTT channels
- You can still receive messages and see channel activity
- Monitored channel audio is paused
How It Works
Whisper uses WebRTC for peer-to-peer audio:
- Signaling — Call setup messages (offer, answer, ICE candidates) are exchanged via your WebSocket connection
- ICE/STUN/TURN — CrewTalk uses both STUN (for direct connections) and a self-hosted TURN server (for relayed connections when direct isn't possible)
- Audio stream — Once connected, audio flows directly between devices (or via TURN relay)
This means your voice goes directly to the other person with minimal latency — not through the PTT relay server.
Presence Integration
When you're on a Whisper call:
- Your presence status changes to "In Call" in the member roster
- Other members can see who you're in a call with
- This prevents others from trying to call you simultaneously
Use Whisper for private conversations that need back-and-forth dialogue — like discussing a shot with the director or troubleshooting with a department head. Use PTT for announcements and coordination that the whole channel needs to hear.