Peterson is the most known for their strobe tuners I believe. There are nowadays many other desktop and smartphone apps and pedals that have a strobe mode, but some are real strobes and some are only simulated. As far as I can tell, a real strobe will recreate the effect based on comparing the input signal frequency to a generated reference. A fake one will just use the estimated frequency (done by a pitch detection algorithm usually based on FFT) but instead of a needle offset or LED meter it will show a steady moving pattern, but it's not as responsive or as reliable as the real thing.
A few years ago I made a small tuner that mimicked the strobe effect by resampling the signal with interpolation to match the wave period (similar to an untriggered oscilloscope) and applying an IIR bandpass filter to get a clean sinewave, then showing the sinewave as a color gradient instead of an oscilloscope view. I tried a few different variations but couldn't figure out how to control the speed (sensitivity) of the movement and make it independent of the input frequency/period (apart from showing more or fewer periods in the pattern) and also it required a strong biquad filter to remove harmonics that would bleed into the strobe pattern (a similar effect can be seen in the turbo tuner (*) guitar pedal that uses LEDs to show a spinning pattern and sometimes the pattern smears or flickers), but this introduced unwanted lag. Here is a screen recording of my old app: https://youtu.be/IjYv1fDEopY
(*) I'm not affiliated in any way, I was just researching this a lot.
Interesting. It took time for us to get the waveform stability working. We also have a smoothed wave overlay on top of raw signal. This is more a filtered version of input signal. Tried adding more filtering to get the sine wave output. But, it was too much CPU intensive. We also tried adding few overlays to this stable waveform. They did not work well and hence removed them. I agree, there is no good way to make the speed independent of input frequency. The plucked note pitch variation in flat bridge instruments like South Indian Veena is too wide when compared to pointed bridge instruments. We are planning to add additional cue that shows if a note is in tune based on pitch variation midpoint. This might help tuning the string or setting the frets relatively accurate.
There’s a neuro-linguistic programming technique you can try to get rid of an earworm.
Picture a radio playing the song and imagine yourself slowly turning down the volume and the song getting quieter until it has gone.
This used to work for me but over time I’ve had to extend it with imagining switching the radio off at the end, unplugging it, and chucking it out the window so it smashes on the ground so no chance of it turning back on!
I had to google what ear worm is. English being a second language, I read the comments here first and thought you were using telepathy (essentially) to get some parasite to leave your ear.
Its rare for a song to really capture me to that extent. I dont know if its because I would just listen to entire albums on repeat or what.
I cant even mention Baby Shark without freaking out some people but I dont get it stuck in my head, I just eventually get tired of singing it with the preschooler.
I'll try that. The one that sometimes works for me is to sing the song very slowly in my head. Something about disrupting the tempo seems to work.
My operating hypothesis is that earworms help us maintain a specific tempo, like the old working on the railroad or singing songs while doing work together, that when we disrupt the tempo, especially slowing it down to where it won't catch other songs, then it works.
Do you have to certify compliance with safety / EMC regulations to sell a product like this? The thought of that always put me off imagining a hardware startup.
RF/EMC: definitely. It's an intentional radiator (WiFi) and an unintentional radiator (high-frequency CPU). Using pre-certified COTS modules helps with this quite a bit because they'll, hopefully, pass on their own but they do not relieve you of the certification burden.
Safety: from a legal perspective I don't believe safety certification is mandatory because it runs on low voltage. The wall wart would need to be certified. But... from a liability perspective it might still be necessary. If one of these devices were to catch fire and burn someone's house down the company is going to get sued. Maybe sued by the homeowner, maybe sued by the homeowner's insurance company. The counter to that is to have solid product liability insurance and the insurer may have specific safety certification requirements before they'll even issue an insurance contract, and they may have additional safety certification options that would reduce the premiums.
There’s a neuro-linguistic programming technique you can try to get rid of an earworm.
Picture a radio playing the song and imagine yourself slowly turning down the volume and the song getting quieter until it has gone.
This used to work for me but over time I’ve had to extend it with imagining switching the radio off at the end, unplugging it, and chucking it out the window so it smashes on the ground so no chance of it turning back on!
Perhaps small enough to include in ffmpeg itself so you can just write commands `ffmpeg do this thing I want`.
Now I say this, it seems like there should already be a shell that is also an LLM where you can mix bits of commands you vaguely remember and natural language a bit like Del Boy speaking French...
That would be an amazingly useful feature of ffmpeg, and considering how large its dependencies are (390MB of packages for `apt install ffmpeg` on a fresh Raspberry Pi OS install), it would be reasonable to have an optional model package.
I was curious and went looking. This is the closest I found after a quick google search. It refers only to lighting options in the reactor chamber not the hallways and such.
"There are some obvious considerations: all underwater nuclear lights should be crafted from stainless steel with rounded and smooth surfaces for easy decontamination, and have no sharp or jagged edges to reduce the risk of workers tearing safety gloves or clothing. "
I spent two summers as a cleaner at a pharmaceutical company in my late teens. The "round corners are easier to clean" were a thing there as well, reason I was told was that sharp corners will scrape off some residue from the cleaning cloths when you drag them over the corner.
Oh, ya, I can see this being really nice for the kitchen sink or the stand in shower. Right now, oil build up gets trapped in corners that require a brush to work out, which is tricky in the shower where it’s all calked.
It feels like the more things I use a kitchen sink for the more I appreciate corners. Cleaning is a little more involved but being able to e.g. set two buckets next to each other and have them be level is really really handy.
You know, I remember seeing this on older pictures, but I tried to come up with an example and couldn't, all recent pictures I could find had regular floor moldings.
The ARM based Acorn Risc PC [1] from mid 90s had a case with up to 7 stackable slices. It made the internal volume larger and you installed a longer backplane for expansion cards.
Someone built a pizza oven in one of the slices [2]
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