Posted by adityaathalye 3 days ago
The chart on page 24 gives the very first division of the US phone into area codes, many of which have of course remained unchanged today.
From page 82, when discussing automated in-band signaling on the phone lines:
> The signal component is a band about 100 cycles [Hz] wide centering on the signal frequency [2600 Hz]. [...] In the talking condition (tone off in both directions) the guard detector sensitivity is such that almost a pure tone is required to operate the receiver since other than signal frequencies will produce a voltage opposing its operation. The guard feature prevents false operation of the receiver from speech signals.
Of course in hindsight, the flaw in this is obvious. The guard band prevents accidental triggering of the signal mechanism by ordinary speech. It does nothing to stop someone from intentionally playing a pure 2600 Hz tone into the telephone handset, using e.g. a whistle from a cereal box.
https://www.costco.com/p/-/berkshire-life-heated-throw/40001...
I was very skeptical until my partner plugged it in, turned it on and put it on me and was like holy cow this is amazing.
My best book of 2025 was Dungeon Crawler Carl, the entire serious.
Otherwise I guess it'll be the seven seas for me which I really don't want to have to do
Also, that video is really making me want to get an OP-1 haha.
From experience, I get you. There are many videos on the internet that do the same.
I bought one and found it... a little constraining for my taste. My observation was that most of the music creation was 'live' (i.e. you had to play something perfectly, to time, and record that) and for what is fundamentally a computer, it has very limited 'sequencing' ability. Also, a lot of the cutesy interface ideas that are so charming on someone else's video grate over time. Luckily I bought mine second-hand and the residuals on these things are insane, so I made a marginal profit reselling it.
All I'd say is that before pulling the trigger, do some research (YouTube reviews especially) on the term "groove box" - there are many, that come with different abilities, strengths, and weaknesses. The OP-1 is cool but limited, and comes with the Teenage Engineering price tag.
Then there's the OP-XY which is even more powerful but unfortunately costs like 4-5x as much so I've not tried it.
https://www.thinoptics.com/products/readers-black-keychain-c...
Fogus: Things and Stuff of 2024 - https://news.ycombinator.com/item?id=42495077 - Dec 2024 (44 comments)
The best things and stuff of 2022 - https://news.ycombinator.com/item?id=33969300 - Dec 2022 (47 comments)
The Best Things and Stuff of 2021 - https://news.ycombinator.com/item?id=29702698 - Dec 2021 (23 comments)
The best things and stuff of 2020 - https://news.ycombinator.com/item?id=25593828 - Dec 2020 (37 comments)
Things and Stuff of 2019 - https://news.ycombinator.com/item?id=21932647 - Jan 2020 (11 comments)
Great things and people that I discovered, learned, read, met, etc in 2017 - https://news.ycombinator.com/item?id=16075626 - Jan 2018 (24 comments)
Best things and stuff of 2015 - https://news.ycombinator.com/item?id=10807501 - Dec 2015 (85 comments)
The best things and stuff of 2014 - https://news.ycombinator.com/item?id=8809710 - Dec 2014 (26 comments)
The best things and stuff of 2013 - https://news.ycombinator.com/item?id=6971351 - Dec 2013 (29 comments)
The best things and stuff of 2012 - https://news.ycombinator.com/item?id=4969569 - Dec 2012 (13 comments)
The best things and stuff of 2011 by Fogus - https://news.ycombinator.com/item?id=3410990 - Dec 2011 (20 comments)