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Welcome to Project Soli

Google ATAP
Demos
YouTube
1 HN user recommended this demo1 month2015–2019 score 1
Years with an HN recommendation, 2007–2026

Referenced for years as the go-to example of fine gesture input, often in discussions of keyboard replacements and later its appearance in the Pixel 4.

Google ATAP's 2015 introduction to Project Soli, a radar-based sensor on a chip that tracks sub-millimeter hand motions for gesture interaction in small devices.

“Google finally ships a research project in a real product” (HN, 2019)

1 recommendations · 18 citations · 1 critical · Demos · partly dated

20 Hacker News comments

From the HN archive; up to 20 kept per video, favoring different commenters. Recommendations first.

@melling Oct 2019 Recommends
on HN thread Soli
Google finally ships a research project in a real product and people don’t seem to understand the usefulness. Human nature for some reason often devolves to “what’s the point?” Here’s the 2015 announcement. There’s a lot of potential. Maybe we’d all benefit from “imagine what’s now possible “ [this video]
The 2015 announcement showing Soli's potential.

Citations, criticism and jokes

@melling Jul 2015 Cites it
on HN thread Pens Are Making a High-Tech Comeback
Better pen input would be great, especially for drawing. How about some form of chorded keyboard or glove? A chorded keyboard was demonstrated in 1968 by Engelbart: [link] Google's Soli project might lead to better input: [this video]
Radar-based gesture sensing as better input.
@melling Aug 2015 Cites it
on HN thread Proton: Multitouch Gestures as Regular Expressions [pdf]
How long before gestures move off the screen surface? This technology got off to an exciting start but it quickly hit a wall. It was disappointing, for example, when Microsoft had to unbundle the Kinect. Microsoft's Kinect - 2010 Leap Motion - 2010 Intel Real Sense - [link] Google's Soli chip - 2016 - [this video] Google's Touch Sensitive Fabric: [link]
Soli radar chip as an example of gesture tech.
@melling Sep 2015 Cites it
on HN thread OptiKey – Full computer control and speech with your eyes
This tool is for people who can't use their hands, of course. For the average person, we're pretty close to being able to use voice instead of typing. [link] [link] Throw in eye tracking and precise gestures ( [this video] ) and the keyboard isn't necessary.
Precise gesture sensing as keyboard replacement.
@melling Oct 2015 Cites it
on HN thread Using a Custom Keyboard for CSS
It would be great if some of the repetitive tasks didn't even require a keyboard but rather use subtle gestures, eye tracking, and voice commands. Leap Motion, for example, never panned out but Google's Soli project might get us there: [this video] Throw in better autocompletion ( [link] ) and software development becomes more precise and less repetitive.
Soli demo of subtle gesture control.
@melling Oct 2015 Cites it
on HN thread How Long Will We Keep Typing?
No one said that the solution has to be all speech. Throw in some small gestures and that'll be faster than reaching for a key. [this video] Throw in eye-tracking and you can pick out any word quickly.
Small gestures as faster input.
@melling Feb 2016 Cites it
on HN thread Ultrasound technology lets you touch and manipulate virtual objects
Gesture based computing is almost here in some form. Apple, Google, Intel and Microsoft are all working on it: Apple: [link] Intel Real Sense - [link] Google's Soli chip - [this video] Microsoft shipped the Kinect 6 years ago. The need for hand tracking with VR headsets should give it another boost. By the 20th anniversary of Minority Report? [link]
Soli among industry gesture efforts.
@melling Feb 2016 Cites it
on HN thread An engineer replaced four monitors with Meta glasses
"The keyboard is the only thing I need, except for the glasses." I think this loses a lot of appeal until we can throw away the keyboard. We should be able to do better. Hopefully, Google ships this silicon this year: [this video] I'd rather have those monitors and no keyboard.
Soli as a path to dropping the keyboard.
@melling Mar 2016 Cites it
on HN thread An iPhone Is an Extension of the Mind
Paper notebooks might be. [link] The cell phone, etc will be a much bigger extension. However, we still need better ways to input, organize and access the information. Handwritten notes, voice memos, pictures, drawings, unstructured and structured data, etc. Cortana/Siri with hand tracking ( [this video] ) and a HoloLens will allow people to organize everything in creative ways.
Hand tracking demo for organizing information.
@melling Apr 2016 Cites it
on HN thread Running Emacs on Android
Now we need a gesture keyboard so we can type, or twitch, instead of using an onscreen keyboard. Finger IO: [link] Google's Soli: [this video] Perhaps a modified game controller: [link]
Soli as gesture input option.
@melling Sep 2016 Cites it
on HN thread Blind Apple engineer is transforming the tech world at only 22
i'm disappointed that we haven't made more progress with voice interfaces. Many people are happy with the keyboard/mouse as their primary input devices but combined with subtle gestures like you might get with Google's Soli and we should get a better user interface for everyone. [this video]
Subtle gestures to complement voice and keyboard.
@melling Jul 2017 Cites it
on HN thread Dell 38 inch UltraSharp monitor
Voice, eye tacking, and gesturing don’t offer possibilities? [this video] [link] And yes, if you’re clicking away in a room of programmers, it won’t work for you, but with a Hololens I’ll find a quiet location.
Gesture control as an alternative to typing.
@melling Aug 2017 Cites it
on HN thread The future of the human-computer interface?
How old are you? It’s really not that hard to imagine the keyboard being replaced by one, or a combination, of technologies in the next decade or two. Voice has gotten dramatically better in the past few years. Another decade? There are also gesture technologies: [this video] Anyway, if you’ve got 3 or 4 decades of life, you still think we won’t have sufficient advances to replace the keyboard?
Gesture tech that could replace the keyboard.
@melling Oct 2017 Cites it
on HN thread Introducing Oculus Go, Plus Santa Cruz Updates
In my dreams the keyboard disappears. My eyes, or fingers, move the cursor, I can speak interactively with the computer, gesture, etc. Can fingers/hands be tracked sufficiently to provide an accurate soft keyboard? [this video]
Hand tracking for soft keyboards.
@cbolton Oct 2019 Cites it
on HN thread Google Announces Pixel 4
The radar chip is especially interesting. I remember being intrigued when it was presented by the ATAP team years ago: [this video] The team showed an impressive amount of cool stuff back then, it's nice to see one of these projects shipping on a flagship product. There's more info here on how it's used: [link] EDIT: found the original presentation: [link] . I think the touch sensitive cloth project also made it into a few products.
Original presentation of the radar chip.
@fermienrico Jan 2018 Pushes back
on HN thread Controlling a Quadcopter with Hand Gestures
Read more
Hand Gesture controls bother me. I see all these fancy implementations enabling hand gestures such as the Google ATAP project called Soli [1], but none of these replace haptical feedback. One of the major aspects of any haptical human-to-machine interface is feedback and robustness. When you turn a high quality 30 indent encoder from Alps [2] or avionics grade Elma encoder [3]; you'll realize the value of haptic feedback. There is a reason why cockpits are full of knobs and dials, although unfortunately, that's changing due to highly integrated multi-function glass instruments. Problem with hand gestures is robustness. Theramins (hand gesture based music instrument) are cool, but they take forever to master and I am not saying they are trying to replace pianos, but let's just say - iPad pianos are not fun precisely because of the lack of feedback. I really think gesture based controls are inferior. They have no place in my living room, my car or anywhere in my life. That said, I think the implementation of hand gesture based systems as pointed out in this article are truly interesting. It is a challenging problem. [1] [this video] [2] [link] [3] [link]

Video list and Hacker News comment labels from HackerTube (prompted by @karpathy), released under ODC-By 1.0, built on the open-index/hacker-news archive. Hacker News data is provided by Y Combinator; comments remain the work of their authors. Video titles, channel names and thumbnails belong to their creators and are shown via YouTube. HackerTube Watch is an unofficial edition. Data export of 2026-10-31.

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