protect this man at all cost. he is a gift to humanity.

28:46 maaan I feel you there. I remember having an assignment to make a game in Java, they recommended people to use Swing but other libraries were also allowed. I ended up writing my own software renderer and built a game on top of that with smooth 60fps animations, the teacher ended up deducting half a point from my otherwise perfect grade because "my approach was unusual"

Please keep adding those videos, they are gold

12:36: second result about QOA 13:03: result disappeared Pepehba

Tsoding is absolutely terrified of floats after this one. (if you know, you know)

alt stream title: zozin flashbanging us with vlc and listening chiptune

Tsoding, there is a video that helped me to understand FFT: it is by Reducible - "FFT: the most ingenious algorithm ever?" What made me "click" is that DFT is essentially a polynomial evaluation with x=exp(-2pi*i*f/N), and samples as coefficients. But if it's a polynomial p(x) - we can split it into even and odd powers: then we get p(-x) for "free": p(x)=even(x)+odd(x) p(-x)=even(x)-odd(x) Now, even(x) is a polynomial with only even powers, but you can also think about it as a polynomial with *all* powers, but with x^2 as a variable! So we can split it again, and get a value for (-x^2) for "free". The odd(x) can also be split, but we need to factor out (x) first - so it would have only even powers = be a polynomial of x^2. So we'll get: p(x)=even(x)+x*odd(x) p(-x)=even(x)-x*odd(x) Now, repeat the same for even and odd, to get x^2 and (-x^2) - and use the second to calculate p(ix) and p(-ix), etc.

These vids are amazing, even tho i usually just program in rust, your intricate detail into talking about your implementations of the code is good to the point of me wanting to go along with you so i can get some taste of C.

The literal amount of knowledge per second I gain from watching your videos is insane

Amazing explanation and a treat to watch the goat zozin

Dude, I love your videos

This is really helpful online learning material lmao thank you for this

please put all videos on KZfaq ❤

The legend does it again!

"Cooley-Tuckey are turning in their grave"....I'm pissing myself here! Loved the video Tsoding. You're making me fall in love again with C and programming.

İ just searching this. youre the man who always teach me something in need

I was just watching your old video today about the music generation 😮.

Please make a spatial mix panel, setting sound sources in 3D space relative to the user, that'd be absolutely insane.

Love the beer mug for drinking tea! :D

2:29:05 Tsoding always making 3 hour long programming streams worth the watch

To get pi, I usually use acosf(-1) instead of atan2. I don't know if it's actually faster to compute, but it's faster to type.

amazing video thanks

I had a dream a few days ago, where I saw you building an audio editor on stream. Then this came out.

this stream brought out the humble side of our guy, charming stuff

The visuals and explanations from @1:38:00 was superb! Great job!

Go Tsoding. I would not have any way to learn without you.

Thanks a lot, great explanation! But you stopped on exactly that point where FastFt started - removing extra calculations of W, thats why we use recursion (those 3 lines of code 😀). You can get explanation in Veritasium video that you suggested (from 17:00 to 19:00). Some time you can encountered with bit reversing operation - for me it was the most confusing. Indeed it just for emulating recursive calls.

Thank you for the cool video and stream! I used this video as a reference for some c practice and i found out through testing and debugging that the "amp" function will access out[i] out of bounds for some bigger "frames" variable's values - happened to me and i had to increase, temporarily, the array's length. Also, the cell_width would be 0 if N was bigger and the rectangles would not be drawn. so i had to use floorf to approximate to an int value and to set it to a value bigger than 1. It's some months later but maybe has similar fun like me. Very curious to look in the next videos if he fixes these things too.

I remember trying to do this a couple of moths ago, using c++ and sfml. It didn't work that well and i kinda felt like it was beyond me so i just move on to other projects. Now gonna try again now with c and sdl2 'cause i'm more used to these, so i can have help by watching this but i would still have to figure out some things by myself. Thanks again tsoding (:

2:10:34 you're essentially getting Fourier coefficients but negating back their rotations by some clockwise value by using the negative sign; so if you manage to rotate it back by a clockwise value equal to the counterclockwise value it was already rotated by you will get the magnitude with respect to one of the fundamental frequencies that make up the original wave that it contributes to the original amplitude.

Genial encontrar este valioso contenido. Contigo estoy aprendiendo C e inglés . Gracias

you can do cabsf(out[i]) to get the magnitude of the complex number

epic vod

So i figured out that learning fourier transforms in college was worth just to understand this video :D

there is a fft course from standford around youtube , a season range

wonder are tsoding using HHKB? the keyboard sound is so nice

You should do a stream where you try to solve as many problems from the euler project

28:17 this reminds me of a program I wrote few years ago that decompose audio into a spectrum of frequencies with fourier transform, it also allows you to edit the spectrum and inverse transform it into a new audio, when I show it to my math teacher.... he was unimpressed

I need that giant glass cup that you have for watching your sessions

holy shit you used nu11's songs!!!!!!

how do I can make Keywords like complex from the complex.h headerfile? It seems for me like a swooped template in C, which shouldn't be that possible. PS: And am I right by 1.0i means it's complex number or?

Have you ever considered making like music production plugins? I feel like that could be cool

Thank you for another education and interesting video. I'm sad that i can't like it twice. I notice, that it all was within one stream :o. As a person who streamed before i know that 5 hours of streaming is hard. And I'm not saying about the quality of content. I don't know how you can think about Fourier transformations at night. My brain refuses to work at that time. P.S. 2:28:34 - The point 👏👏👏 i'm laughing as fk :D

2:28:30 АХАХАХАХАХ!!1

Nice

Синус и косинус блин 😂😂

Just a note for anyone who is curious in the FFT: - FFT uses butterfly method to recursively divide and swap to compute the discrete frequency contribution of each sample. It works because exp(-jf) is a point on the unit circle on the complex plane, for DFT, these points will repeat. - The minus sign is not really important, it's just a (widely used) convention for the forward Fourier transform, if there's no minus sign for the forward transform, then the reverse transform must have the minus sign. The region where the integral converges might be different but I think all the properties remain the same.

This is a great video on how to process raw buffered data. If anyone is coding this... recommend adding a negative to the h after the else statement - otherwise, all the rectangles are rendered above the "zero" axis. This is because the samples (the t's) are negative. See below: if (t >= 0) { DrawRectangle(i * cell_width, h / 2 - (h / 2) * t, 1, (h / 2) * t, RED); } else { DrawRectangle(i * cell_width, h / 2, 1, (-h / 2) * t, RED);

Demoscene awaits you 👾

nice

Hey, where can I find an invite link to your discord server?

Need a flash bang warning when you switch over to vlc

Damn, I was just making a music visualizer with webgpu and this popped up!

You have the same IKEA chair as me lmao

how are you so good at writing code?

Next video: using audio files to generate terrain a.k.a. 1d perlin noise or vice-versa

i don't know why but the audio doesn't seem to work on my mac ?? any solutions ??

Noob question. How did he pull up the raylib docs so fast (@7:55) ? Looked like searched using telescope or something within vim for the include folder that contained the doc. Is that right?

flac is just specialized (lossless) compression for wav.

That's odd that FLAC was excluded. I didn't think it was too hard, I wrote a FLAC encoder in C++ as part of an MJPEG AVI writer

won't you continue fortran stuff?

my compiler won't let me set a struct { float left; float right; } Frames equal to a void pointer like you're doing??

what operating system do you use?

2:28:30 Sinus i Cosinus BLYAD! 😁😆🤣

pog

Help this recreational programmer keeps making cool awesome content how can I keep up lol

Why I can't understand how sounds work

45:19 what kind of black magic did i witness here? Especially at the end…

I identify with your seething frustration and confusion with inconsistent terminology on a spiritual level

1:35:25 yeah, it is. i remember 50 digits of pi 😅

Make audio plugin like reverb after this 😂

1:40:25 actually you can measure precisely n/2 frequencies, because of periodic nature of sins (that's why 48000 Hz sample rate is so common, because normal humans can hear up to 20 kHz)

And at nights you helping fsb to fight "The west" using your hacking skills?

Where did that raylib.env come from? How is that set up?

Great!

✍

What editor is he using?

2:28:24

Where are you from?

One thing that pissing me off is that when you google "what is samples", Adobe says on their site that "more samples = better result", which is total BS if you just listening sound. It can be true when you apply different transformations on sound, but they don't mention that. Basically, you need at least two points ("samples") to reproduce original frequency of wave, which is making sence if you think about it as "we hearing how volume changed and our brain doing FFT on that change". So, human ear theoretically can sense freqs up to 22kHz. Double that and add some room to avoid aliasing, and here you get 44.1kHz and 48kHz. DON'T DOWNLOAD 96kHz MUSIC, IT'S POINTLESS.

no mpd lol

1:26:57 the answer I need to question lmao

2:28:35 lulz

Is this C programming language?

fft these nuts 🤣🤣🤣🤣

Please. Do mp3. Player in c

fft implemention is wrong its was giving different output compare to first dft implementation

wtf is a cliteral?

Bin ich der einzige der nicht wusste das Tsoding Deutsch kann? English: Am i the only one who dosn't know that he speaks german?

Did anyone notice that "Porn Folder : 7.4GB" in i3 bars😂😂 Is that a troll or Is that real?? I noticed that When I was watching this in full screen

ugh, that music is giving me a headache

Write macro ARRAY_LEN with parentheses to protect the code in the future. ARRAY_LEN (xs) = ( sizeof (xs) / sizeof (xs [ 0 ] ) ) This is one way of hidden error: float errorValue = someNum / ARRAY(X); => float errorValue = someNum / sizeof (xs) / sizeof (xs [ 0 ] ); => float errorValue = ( someNum / sizeof (xs) ) / sizeof (xs [ 0 ] ) ; and this is not correct value