Dual Audio Capture AI — Record Both Sides of Any Call
Capture both your voice and the caller's voice simultaneously. CFAI's Dual Audio Capture records mic + system audio in one pass — no bot, no call recording API needed.
Why Most Call Recording Tools Only Capture One Side — And How to Fix It
Standard microphone recording captures only your voice. Standard screen recording captures system audio but misses microphone. Most call recording tools solve this by joining as a bot — but that only works for video conferencing platforms, not VoIP, WhatsApp, or phone calls via PC.
CFAI's Dual Audio Capture records both your microphone input and your system audio simultaneously, in a single pass. This means both sides of any VoIP call, WhatsApp Desktop call, Skype call, or Teams/Zoom call are captured and transcribed together — with speaker diarization automatically labeling your voice vs. the other party.
The architecture is simple: CFAI runs two parallel audio capture streams at the Windows OS level, merges them for transcription, and applies speaker separation using diarization. No call recording API, no platform integration, no bot required. Works on any Windows app that plays or captures audio.
Dual Audio Capture Tools — Feature Comparison 2026
| Tool | Local Processing | No Bot | Speaker ID | Real-time Translation | Cognitive Map | Price |
|---|---|---|---|---|---|---|
| CFAI ★ Recommended | ✅ | ✅ | ✅ | ✅ | ✅ | Free trial / From €7.99/mo |
| OBS Studio (audio only) | ❌ | ✅ | ❌ | ❌ | ❌ | Free (open source) |
| Craig (Discord) | ❌ | ❌ | ✅ | ❌ | ❌ | Free (Discord only) |
| Audacity (manual) | ❌ | ✅ | ❌ | ❌ | ❌ | Free (manual recording) |
| Recall.ai | ❌ | ❌ | ✅ | ❌ | ❌ | API pricing |
Why CFAI's Dual Audio Capture Is the Best Solution for Both-Sides Recording
Local Whisper Transcription
CFAI uses Faster Whisper running entirely on your Windows PC. Your audio is never uploaded — processing happens locally, even offline.
Real-Time Cognitive Map
As you speak, CFAI builds a live semantic map of your conversation. See topic clusters, predict where discussion is heading, and stay focused — in real time.
No Bot, No Notifications
CFAI captures audio from your microphone and system audio at the OS level. No bot joins your call. Other participants see no recording notification.
101 Languages, Real-Time
CFAI translates your meeting transcript into 101 languages as you speak. Perfect for multilingual teams and international calls.
Document RAG During Calls
Upload PDFs, Word docs, or CSV files. During your meeting, CFAI retrieves relevant information from your documents in real time.
Agentic AI and Web Search
CFAI's Agentic AI can perform multi-step tasks, search the web, and surface information proactively during your meeting.
100% Private by Default
All audio processing, transcription, and AI analysis runs on your Windows device. Nothing is sent to CFAI's servers unless you explicitly enable optional cloud features.
Flexible Plans, No Surprises
Free trial to test everything. Then choose from €7.99/mo (500 CF), €12.99/mo (1500 CF), or €24.99/mo (3000 CF) — cancel anytime, no lock-in.
How to Enable Dual Audio Capture in CFAI
Enable Dual Audio Capture in Settings
In CFAI settings, toggle on Dual Audio Capture. This activates simultaneous recording of your microphone channel and your system audio channel.
Make a Call via Any Windows App
Use WhatsApp Desktop, Skype, Teams, Zoom, or any VoIP app on your Windows PC. CFAI captures your microphone and the system audio (other party's voice) simultaneously.
Get a Speaker-Labeled Transcript
CFAI's speaker diarization separates the two audio channels in the transcript — your voice on one label, the other party on another. Both sides of the conversation are fully transcribed.
Review the Complete Call Transcript
After the call, your transcript includes both parties with speaker labels. The Cognitive Map reflects the complete conversation structure. All data stays on your Windows device.
Frequently Asked Questions
Can I record both sides of a phone call on Windows?
Yes. CFAI's Dual Audio Capture records your microphone (your voice) and system audio (the other person's voice via speakers/headset) simultaneously. This works for any VoIP app on Windows: WhatsApp Desktop, Skype, Teams, Zoom, Google Voice.
What is Dual Audio Capture?
Dual Audio Capture is a CFAI feature that records two audio streams simultaneously: your microphone input and your PC's system audio output. This captures both sides of a phone or VoIP call in a single pass, without any platform API or bot.
Does Dual Audio Capture work with headphones?
Yes, but requires correct Windows audio routing. If your headset uses a USB audio device, ensure CFAI is capturing that device's system audio output. Standard headset with 3.5mm or USB audio works correctly with Dual Audio Capture in CFAI's settings.
Can I use Dual Audio Capture for conference calls?
Yes. For Zoom, Teams, or Google Meet calls, Dual Audio Capture records the full conference audio (everyone's voices via system audio) plus your own microphone input. Speaker diarization then separates individual voices in the transcript.
Is Dual Audio Capture legal?
The legality of recording both sides of a call depends on your jurisdiction and context. One-party consent laws apply in many places. Always check local regulations and disclose recording where required.
Record Every Word of Every Call — Both Sides
Try CFAI free. Enable Dual Audio Capture for complete call transcription — mic + system audio, speaker-labeled, local processing. Plans from €7.99/month.