Ever opened a 4-minute audio from a customer, scanned the transcription quickly, replied — only to realize afterwards the person was furious, and your reply came across as dismissive?
It happens. Transcription gives you what was said. But not how.
Anyone working in support, sales or consulting knows: emotional tone changes the right reply completely. A calm "I need this fixed today" is one thing. The same phrase with raised voice is another reality entirely — needs urgency, empathy, maybe escalation.
ZapVox's sentiment analysis feature was built exactly for that: capture the audio's emotional tone and hand it to you before you reply.
How it works in practice
You receive an audio on WhatsApp Web. ZapVox transcribes automatically (as always). Now you see an extra button next to the transcription: 🎭 Sentiment.
Click it. In 2 seconds, a small chip appears separated from the transcription text, with 3 pieces of info:
- Classification: Positive / Neutral / Negative
- Specific tone: a short sentence — "product frustration", "enthusiasm", "anxiety", "formal complaint", etc.
- Visual signal: chip color (green / gray / red)
Transcription: "Hi, this is Maria from order 4581. I've been waiting for a week and nobody replies when I message. I need this product to work. Please get back to me today."
Sentiment: 🎭 Negative · Growing frustration over lack of response
Before replying "Hi Maria, we got your message", you know the tone needs more empathy: acknowledge the delay, give a concrete deadline, apologize formally.
Where it changes the game
Some situations where sentiment completely changes the right response:
Customer support
Got 30 audios in the queue. Sentiment analysis helps prioritize — handle the negatives first (urgency), then neutrals (routine), positives last (compliments, can wait 10 min).
In an online store, this means catching the frustrated customer before they file a public complaint.
Medical and therapy consultations
A patient sends an audio describing symptoms. Content matters, but the tone of voice reveals things transcription alone can't catch — anxiety, depression, panic. As a doctor/therapist, you prepare better for the next session.
Sales and negotiation
Client sends an audio about a proposal. Positive tone: close it. Hesitant or negative tone: need to understand objections before sending the contract.
Remote teams
You're a manager. You get audios from team members. Sentiment analysis shows quickly who's enthusiastic, who's overloaded, who needs a 1:1 this week.
Why it DOESN'T replace listening in some cases
To be honest: AI sentiment analysis has limits. It nails clearly toned situations — explicit frustration, enthusiastic joy, open irritation.
But subtle tones, irony, sarcasm, regional humor — it can slip. Use it as a signal, not as absolute truth.
When the detected sentiment would significantly change your reply, it's worth listening to the audio (at least the first 15 seconds). Analysis accelerates triage — it doesn't replace human judgment in critical moments.
Privacy: the audio stays yours
Sentiment analysis uses the same pipeline as transcription: audio is processed in seconds and discarded. ZapVox doesn't store content, doesn't keep recordings, doesn't build an emotional profile of anyone.
The sentiment chip appears separate from the transcription — in an isolated DOM element. That means if you use "copy" or "auto-send" on the result, the sentiment does NOT go along. It's info for you, not for third parties.
How to enable
The 🎭 Sentiment button appears automatically next to every transcription if you are:
- Trial user (7 free days when you first sign in)
- Pro user (monthly, annual or biennial)
On Free plan, the button doesn't appear — Free is transcription only.
Want automatic sentiment on every new audio (no click)? Settings → "Post-transcription action" → Sentiment analysis. Now every new audio message arrives with a sentiment chip directly.
7-day full Trial — no credit card.
Sentiment analysis is an evolving feature. If you use it for professional support and want specific feedback (e.g., sentiments in medical, legal contexts), email [email protected] and we'll adapt.