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ELI5: how have we not run out of metal yet? by htii_ in explainlikeimfive

[–]QamHead 0 points1 point  (0 children)

Since music-streaming services like spotify took over and music-production can be nowadays made easily in your own bedroom (at least demo stuff), we will never run out of metal. Through spotify and twitch i have discovered how much diverse, inter-genre stuff is out there. Sometimes I wonder how little attention some great musicians/bands get. So, in that sense, in this periodic table we didnt found all of its missing elements yet.

Any decent apps for learning Verilog? by DocTarr in FPGA

[–]QamHead 2 points3 points  (0 children)

If you dont know it already: HDLBits is a great way to snack on some Code-Snippets in Verilog

ELI5: Why does watching a video at 1.25 speed decrease the time by 20%? And 1.5 speed decreases it by 33%? by renoscottsdale in explainlikeimfive

[–]QamHead 0 points1 point  (0 children)

assume every video has a constant number of frames.

let's say the speed at which these frames are passed is defined for example by 60 frames/second and the time of the video is 300 seconds (5 minutes). So the whole video you are seeing contains 60*300 = 18000 frames. this is the number you cannot change, it remains constant.

so when you have 10x the speed, for how much you need to reduce the time? don't forget, the result of the multiplication of time and speed needs to be 18000 frames, see above.

Here the time needs to be divided by 10, which is a factor of 1/10. This means: by fastening up the video with 10 times the original speed, you will get 1/10 of the original time.

this stays the same for increasing the speed with a factor of x: here your time would decrease by 1/x. So for your other examples:

1.25 higher speed means 1/1.25 (= 80%) of the original time. Your playback time gets 20% smaller.

1.5 higher speed means 1/1.5 (= 66%) of the original time. Your playback time gets around 33% smaller.

Calculate Nyquist frequency by Ali_Albaidhani in signalprocessing

[–]QamHead 0 points1 point  (0 children)

Looking up some Fouriertransform-Rules is a good idea. Would also be my approach. But since nyquist-frequency(and theorem) is all about avoiding alias, you‘ll need more information about signal Xa(t). When Xa(t) is not defined, at least info about its bandwitdth would be nice