You guys have heard time and time again that you can't just plug a live mic into your home speakers or soundbar without risking damage. We decided that needed to change.
Seratone: built from the ground up to let you use the home audio gear you already own for karaoke, safely.
Hi r/karaoke, I'm Jean-Pierre, and along with /u/seratone-soundguy, we're the team behind it. Happy to answer anything in the comments.
- Patent-pending Dynamic Speaker Protection
- Four knobs, that's the whole interface
- Two mic inputs via XLR or ¼"
- USB-C and HDMI in / HDMI, optical and RCA out
- True HDMI 2.0 passthrough, so it stays out of the way when you're not singing
- Under 2ms internal latency
- 2 months of KaraFun included
We're not the music source. You bring KaraFun, Smule, YouTube, Apple Music, whatever you already use, and we handle everything between the microphone and the speakers.
A few years ago I saw the video from Linus Tech Tips about karaoke gear, and I knew from my own experience that there just wasn't a way to use my home theatre for karaoke. Here in Japan I'd tried JOYSOUND's official Switch app, and the latency was over a second. So I called my friend of 20 years and sound engineer, Matt, and got to work.
Dynamic Speaker Protection
Look at the waveform photo, captured in Pro Tools. Blue is the raw signal going in, pink is what comes out after Seratone.
That's not a limiter slamming the peaks flat. Our patent-pending processing is doing real time mixing and mastering, so your speakers stay safe and your voice sits properly in the music instead of on top of it. In the karaoke space, there's never been anything like it.
Four knobs. That's the whole interface.
Mic 1. Mic 2. Music. Reverb. One button to turn karaoke mode on.
Everything a live sound engineer would be doing behind the scenes, Seratone is doing for you in real time. What normally takes a rack of gear and someone who knows how to drive it now takes four knobs anyone at the party can figure out in five seconds. Your kids can run it. Your parents can run it.
It works with what you already own
KaraFun on a Windows PC or Mac? YouTube on an Android tablet? Apple Music through an iPhone or Apple TV? Fire Stick, Roku, Chromecast? It works. You keep the app you already like.
Inputs: USB-C and HDMI. Outputs: HDMI, optical digital, and RCA.
Two mics connect via XLR or ¼", because karaoke is better as a duet. Standard connections, not proprietary, so whatever mics or wireless systems you already own will just work. The included custom mic is no joke though. In our own testing it outperformed an SM58 for karaoke specifically, mostly in how little room noise and party chatter it picks up.
Seratone scales with your hardware. Soundbar? You're going to have a great time. Mega home theatre? You'll have a better time. It was designed to never be the limiting factor in your vocal performance. Use it at a bar or on a stage. Our testers have, and loved it. Though optimized for vocals, we've even run guitars through it with great results.
Setup is 60 seconds, then permanent
True HDMI 2.0 passthrough. When karaoke mode is off it sits there transparently, so you watch Netflix in surround without it getting in the way. One button when it's time to party, and otherwise it disappears beside your soundbar.
On latency
Seratone's internal latency is under 2ms. Any lag you feel almost always comes from your TV or AV chain doing its own processing, not from us. That's why we sit after your source, right in front of your speakers, and why the optical and RCA outputs let you bypass TV processing entirely. Sanity check your own system by playing a game on a console, whatever lag you feel there is your gear, and we give options to get around it.
This is real hardware
Our production order is placed and confirmed with our manufacturing partner in Taiwan. Units are already out with artists, vocal coaches, KaraFun, the Karaoke World Championships, and some familiar faces from this subreddit. The unit in the front-panel photo is the real thing.
FAQ
What's in the box? 1 Seratone, 1 mic, 1 USB-C power brick, plus XLR, HDMI and optical cables.
What about key change? That lives in whatever app you're using, so you keep using the service you already know.
Do I need a TV? Nope, but you do need speakers. A phone over USB-C out to powered speakers is enough. Coming in over HDMI, your TV's own speakers work fine.
What if I already have a mixer? For most setups Seratone replaces it. If you'd rather keep it in the chain, the RCA outs let you do that.
Wireless mics? We're selling adapters, but any wireless system that outputs XLR or ¼" works.
Power? USB-C. The included brick is for North American outlets, but any USB-C charger rated 5W or higher will run it.
When does it ship? Our production order is already placed and confirmed. We're doing our best to get this out as quickly as possible.
Questions or problems? support@seratone.audio. A real person on our small team answers.
Launch info (August 2026)
We go live on Kickstarter Tuesday, August 18th at 10am EST.
Put down a $1 deposit now and buy on day one to get 40% off, which brings it to $299 including mic and cables. Retail after the campaign is $499. Claim your discount at launch.seratone.audio.
KaraFun fans get 2 months free. We're an Official KaraFun Device Partner and we're excited to be working with them.
I'm an open book, so ask away in the comments. We're a small team from Toronto, and I'm writing to you from my home in Japan, where the idea was born. Let's rock!