Okay, I've got to get this off my chest after trying to integrate Resemble AI's voice cloning into a live chat support widget for my team. The idea was to give our canned responses a friendly, branded voice for users who preferred audio.
The lag is a deal-breaker. We're talking 2-3 seconds *minimum* from triggering the text-to-speech to hearing the first word in the user's browser. In a real-time support scenario, that feels like an eternity. A customer asking "Is my payment secure?" doesn't want to stare at a pulsing audio icon while our AI assembles the reply. They'll think the system has frozen. We tested against some simpler TTS services and even basic Amazon Polly, and the delay was noticeably shorter.
It's a shame, because the voice quality itself is incredibly realistic and was perfect for our needs. But the architecture seems built for pre-rendering audio for videos or podcasts, not for on-demand, low-latency interactions.
Has anyone else tried using it in a live context? Did you find a workaround, or did you also have to switch tools for real-time use cases? I'm currently looking at ElevenLabs for this, but open to other comparisons.
Cheers
Oh, I completely hear you on this. That 2-3 second lag is an absolute killer for live support, where pacing and immediacy are everything. It turns a potential "wow, this is cool" moment into an awkward, trust-eroding pause.
You've hit the nail on the head about their architecture being geared for pre-rendering. I've seen teams try to batch-generate audio for common FAQs upfront to sidestep the lag, but then you lose the dynamic, personalized aspect that made the idea appealing in the first place. It becomes just a fancier audio file player.
ElevenLabs is definitely the one I see mentioned most for this specific low-latency use case. Their streaming API seems built for the sort of conversational flow you need. Have you had a chance to benchmark their latency against your Polly tests yet? I'm curious how much of an improvement folks are actually seeing.
Let's keep it real.
That 2-3 second lag is such a good point. I hadn't even thought about the user perception side of it, but you're totally right. A pulsing icon with silence behind it would feel broken.
> We tested against some simpler TTS services and even basic Amazon Polly, and the delay was noticeably shorter.
I'm curious, did those simpler services still have a voice quality you were okay with for your brand? Or was the choice basically between "fast and robotic" vs "realistic and slow"? Trying to understand the trade-off here.
I'm looking at adding audio to our support stuff too, so this is super helpful. Latency wasn't even on my radar until now.
Been down this exact road. That lag isn't a bug, it's a feature of their model size. You can't get that level of fidelity without the processing time.
But you're right, it's for pre-rendered content. Trying to use it live is like using a film studio's CGI render farm for a Zoom call. The wrong tool.
ElevenLabs is the obvious next test. Their streaming is built for this. But I'll warn you, the voice cloning isn't quite as spooky-good as Resemble's. It's the trade-off: instant but slightly less "human," or perfect and slow. For support, you pick instant every time.
CRM is a necessary evil
Spot on about the CGI render farm analogy. That's exactly what it feels like.
I think you've nailed the trade-off, but I'd add one nuance from our testing. The "instant but slightly less human" choice isn't just about speed. It's about *predictability*. With ElevenLabs' streaming, the latency is consistently low, which lets you design a proper conversational flow with expected pauses. That consistency matters more for user trust than shaving off another 100ms.
The real killer for us was when a longer, complex support response would sometimes cause a 5+ second lag with Resemble. That inconsistency makes it impossible to design a good UX.
Spreadsheets > marketing slides.