ctrager

6 ms·

31.
by ctrager 6y ago
I downloaded the source code and am hunting around but I haven't stumbled upon the pitch detection logic. Do you know what file, functions?
32.
by ctrager 6y ago
That's included in "etc"
33.
by ctrager 6y ago
You might enjoy this article: https://stringsmagazine.com/perfect-fifths-a-few-thoughts-on...
34.
by ctrager 6y ago
FFT is configurable at the bottom of the page, but for me it gets unpleasantly laggy if I make it bigger than 4096
35.
by ctrager 6y ago
You must have a very pure voice!
36.
by ctrager 6y ago
Just FYI, notice the configurable "Sensitivity" setting. The default of 12 let's you miss by about a quarter of a tone (half step) either way.
37.
by ctrager 6y ago
I coded for transposing up or down by an octave, but not by other intervals. I imagine it wouldn't be hard for somebody to fork/modify the code to transpose by thirds, etc.
38.
by ctrager 6y ago
Yes, sure. And TBH, even though I wrote this for my wife learning viola, I have since banned her from using it (don't worry - I have no power, she completely ignores my ban). I encourage her to use her ears rather than her eyes for mon
39.
by ctrager 6y ago
I'm not any sort of scientist - everything I know about the topic I learned from trying to code this thing - but don't think of the sound wave coming from your viola as a simple sine wave. It's way more complex than that, wit
40.
by ctrager 6y ago
I think what you are referring to is "temperment", and a TLDR version of that topic would be that for tuning a piano so that it can sound in tune no matter what key, it is tuned to be evenly out of tune everywhere, aka, "equ
41.
by ctrager 6y ago
I wrote this for my wife who is learning to play viola (I play violin at a barely endurable amateur level). It was to help her improve her intonation. As you play it draws the notes that you are playing on the musical staff, coloring them b
42.
Show HN: Are you playing your violin (viola, guitar, etc.) in tune?(ctrager.github.io)
80 points by ctrager 6y ago|76 comments
43.
by ctrager 6y ago
my python *script
44.
by ctrager 6y ago
OMG, they've raised $4 million dollars??!! Clearly I'm not as clever at monetizing my ideas.
45.
by ctrager 6y ago
See my comment above. The cameras are on my WIFI network. They provide a URL you connect to and that gives you a stream. My python stream connects to that stream so I can watch my birdfeeder by looking at my laptop stream. FYI, VLC also kno
46.
by ctrager 6y ago
Amcrest IP2M-841B. This works the best of the three I've tried. The other two: The cheap Wyze cameras which special software that gives access to the RTSP stream, but the stream is so jerky it creates too many false alarms to be usefu
47.
by ctrager 6y ago
A birdfeeder, a security camera, and this python script: https://github.com/ctrager/opencv_py/blob/master/red_yellow_... I want to record visits to my birdfeeder but not all the visits. 99% of the visito
48.
by ctrager 6y ago
When I read the list of reasons "Why Jira Sucks" what came to mine was the Charlie Kaufman movie "Synecdoche, New York". In that movie, a playwright keeps expanding the scope of a play to more and more encompass the scop
49.
by ctrager 6y ago
I do agree that the altitude must be taken seriously. I've gotten sick. That's why I did write to camp the night before near the trailhead, at 9,000/10,000, and to be okay with NOT going over the pass on day one. Maybe that&#
50.
by ctrager 6y ago
Regarding remote - I live in Chicago. The nearest decent place to backpack is a 7 hour drive North, and it's nice, but it's the Midwest, not the mountains. For mountains, the last time I went backpacking in the Sierra, it took me
51.
by ctrager 6y ago
Regarding "Bishop/Kearsarge passes are quite remote and rugged". I'm not sure what this means, but obviously everybody has their own personal database of experiences. The town of Bishop would be your base, and you can ge
52.
by ctrager 6y ago
I just want to add, for actual American-style backpacking, I think the best place for somebody who wants a managable challenge is the Sierra Nevada mountains in California, maybe a trip that would have you enter the mountains via Bishop or
53.
by ctrager 6y ago
Consider the Camino de Santiago. I've done the last 300 km. The distance between places to stay is manageable, lots of infrastructure, lots of friendly people who could help you if you get stuck. You don't need to carry much becau
54.
by ctrager 6y ago
Nice White Parents https://www.nytimes.com/2020/07/23/podcasts/nice-white-paren...
55.
Show HN: Are you playing your violin (viola, guitar, etc.) in tune?(ctrager.github.io)
1 points by ctrager 6y ago|1 comments
56.
by ctrager 6y ago
I wrote this for my wife who is learning to play viola (I play violin at a barely endurable amateur level). It was to help her improve her intonation. As you play it draws the notes that you are playing on the musical staff, coloring them b
57.
by ctrager 6y ago
I tried using their RTSP for my own motion detection logic (python, opencv, pointing at my birdfeeder) but the stream is too glitchy. So far the Amcrest IP2M-841 is working best for me.
58.
by ctrager 6y ago
I'm a retired software dev. Before the pandemic I hadn't coded in 4 years, but somehow got the itch. One of the things I've been playing with is pointing a security camera at my birdfeeder, but I'm not so interested in c
59.
by ctrager 6y ago
I've been feeling stupid these past few days because I've been using ffmpeg for the first time. I've been trying to take an rtsp stream from a security camera and transcode it, restream it, to something that can be viewed in
60.
by ctrager 6y ago
I had tried it briefly because my favorite youtube violin teacher Beth Blackerby recommended it in one of her videos, and it's great. But, I wanted the experience of coding something myself (I'm retired, hadn't coded in four

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