terpstrakeyboard

http://terpstrakeyboard.com/web-app/keys.htm

Web Development

Explore on GitHub Read Hacker News discussions

2Distinct people

2Mentions

1Explicit recommenders

69GitHub stars

REPOSITORY AT A GLANCE

What to know before exploring

What it is

http://terpstrakeyboard.com/web-app/keys.htm

GitHub

Where it is used

No documented product use has been verified yet.

What people are saying

My favorite variant: https://novayashkola.org/janko/ , https://en.wikipedia.org/wiki/Jank%C3%B3_keyboard , https://en.wikipedia.org/wiki/Isomorphic_keyboard Since a year ago, I…

nayuki used a recommendation phrase. One indexed comment matches. This is a phrase match, not a verdict.

No classified warning is attached to this page. Read the discussions before treating silence as approval.

Also in these discussions

No other repository is repeatedly linked in the same discussions.

This week on Hacker News

Nov 7–Nov 14 UTC · Direct repository links and separately labeled related project stories. Indexed through 11/14/2026, 5:04:57 PM UTC.

No direct repository links were found in the indexed HN discussions over the past seven days. Older discussions are available below.

Mentions over time

HN mentions by hour2 dated mentions

Observed mentions: 2025-06-18 12:04:21 UTC to 2025-06-18 19:00:41 UTC.

Counts come from the repository’s dated source evidence. Index cutoff: 2026-11-02 08:16:59 UTC.

View mention counts and date ranges

UTC ranges include their start and exclude their end. Select a period to filter the source evidence.
Period	Start (UTC)	End (exclusive, UTC)	Mentions	Comments
Jun 18, 12:00	2025-06-18 12:00:00 UTC	2025-06-18 13:00:00 UTC	1	1
Jun 18, 13:00	2025-06-18 13:00:00 UTC	2025-06-18 14:00:00 UTC	0	0
Jun 18, 14:00	2025-06-18 14:00:00 UTC	2025-06-18 15:00:00 UTC	0	0
Jun 18, 15:00	2025-06-18 15:00:00 UTC	2025-06-18 16:00:00 UTC	0	0
Jun 18, 16:00	2025-06-18 16:00:00 UTC	2025-06-18 17:00:00 UTC	0	0
Jun 18, 17:00	2025-06-18 17:00:00 UTC	2025-06-18 18:00:00 UTC	0	0
Jun 18, 18:00	2025-06-18 18:00:00 UTC	2025-06-18 19:00:00 UTC	0	0
Jun 18, 19:00	2025-06-18 19:00:00 UTC	2025-06-18 20:00:00 UTC	1	1

What Hacker News says

2 sources

nayuki·Jun 18, 2025Recommendation phrase

My favorite variant: https://novayashkola.org/janko/ , https://en.wikipedia.org/wiki/Jank%C3%B3_keyboard , https://en.wikipedia.org/wiki/Isomorphic_keyboard Since a year ago, I found that I can play songs by ear on the Janko keyboard far more easily than on standard piano keyboards. More resources: https://github.com/wcgbg/terpstrakeyboard/ , https://www.youtube.com/results?search_query=janko%20keyboar...

In Terpstra Keyboard

Aachen·Jun 18, 2025

I'm impressed how responsive the keys are! Will definitely be checking out on desktop if I can see how the audio rendering code works (unless someone here already knows). I presume the audio synthesis API and ontouchstart but maybe there's something clever in addition like prerendering the audio samples rather than synthesising them on press Maybe it also helps that I've got a headphone jack plugged in instead of the Bluetooth I'm used to from listening to things during the day, but even so, my touchscreen just doesn't feel this responsive normally, including in games. It's on my list of things to check the delay of, but since my phone's 960 fps camera is the equipment I use to check that, it is a bit tricky Edit: ontouchstart calls noteOn method https://github.com/wcgbg/terpstrakeyboard/blob/03d526a0ed5c7... This eventually calls into au

Read the rest

dio api start with 0 delay https://github.com/wcgbg/terpstrakeyboard/blob/03d526a0ed5c7... The data to play was retrieved from the server (based on the instrument you selected) and parsed ahead of time https://github.com/wcgbg/terpstrakeyboard/blob/03d526a0ed5c7... It loads samples at four frequencies and plays the nearest one at the appropriate rate (proportional to the target frequency) https://github.com/wcgbg/terpstrakeyboard/blob/03d526a0ed5c7... The settings.audioContext variable is simply an instance of the web audio API as expected (with a fallback to support Safari/webkit) https://github.com/wcgbg/terpstrakeyboard/blob/03d526a0ed5c7... This gainNode it's connecting is just about playback volume it seems https://developer.mozilla.org/en-US/docs/Web/API/BaseAudioCo... and "audioContext.destination", MDN says, you can think of as a speaker device So nothing too special here: of course preloading server data but then simply creating a new sound source during ontouchstart is enough. I guess delay in other software comes from the extra cruft they have such as big libraries (and Bluetooth, in the cases where I use that), not from any actual delay in touchscreen or audio rendering

In Terpstra Keyboard