Name: 賣掉放大器的人。如何用JS處理音樂｜Vitalii Bobrov｜JSConf Korea 2019 (The Man who Sold the Amp: How to Process Music with JS | Vitalii Bobrov | JSConf Korea 2019)
Uploaded: 2021-01-14T10:25:11.000Z
Duration: 29 min 45 s
Description: 【看影片學英語】數萬部 YouTube 影片，搭配英漢字典即點即查，輕鬆掌握單字發音與用法，長久累積看電影不必再看字幕。

So I know you already tired, but who of you have some rock and roll matter?

Okay, so this talk, I will show you how to sell to you.

So before we start few words about myself.

I'm working as a list of 20 engineer at a company called a Bomb Systems.

I also co organized an angle of Russell meet ups and the disclaimer.

I'm not a professional guitar player, so don't judge me.

It just Jacoby and I used to play it bunker groups when I was a teenager.

You can find me on feature, and you can read my block.

I started to block posting some information regarding this topic that I will show today.

It exists for a while in Web standards, most of browsers can't a good supper to fit.

So what is it actually is provide us visa context.

The is which you can create a union directed graph with Order knows those order knows could be ah, get together to create some effects, create, generate some music or process life stream How it looks like we have some input.

It might be a generated sound with escalators and we have announced put our speakers, headphones, whatever.

And between that, we have some notes connected This notes we can achieve some effect sent audio processing If you take a look at really get our stock we have for guitar We have some amplifiers cabinets and between them we have some stunt boxes with some effects like corals distortion And so so how we can actually connect instrument Ah, this could be applied to any instrument.

Actually is it could be connected toe an order cart but in my case is better.

Okay, fist, If all we need to create order, context or their context is the main object that allows you to create new notes, connect them and put it to some destination so invigorates this context.

After that, we request some stream Ah in Louisville used navigator made their devices and we are requesting order.

In my case, you can also request video, but I don't need it.

And actually, you can, ah catch errors if you don't grant permissions, toe order or something against run.

So it's optional this fine, but hey, wait.

You can request order using Just get media order.

True, but by default, most of browsers apply some post processing for input stream.

It's completely fine for Microphone for chatting application like Ken got Skype.

But for Rebekah Does, they will reduce amount off our signal, which we want to use so instead to person.

Just true, we need to pass some constraints toe, remove echo cancellation after gain control noise suspension and provide some lead and Sian doing that, we get the most clean sound as we can from our instruments.

We have a contest and we need to connect this stream to destination context.

Destination is a on default output selected in your system, for example, now should output to the speakers.

Usually we need to control the amount of volume so not hurry.

We can imagine the order signal s sine wave.

Yeah, and the amplitude of the sine wave is actually the amount off William for the sound.

So multiplying it or dividing by some numbers, we'll reduce the amplitude and reduce example itude we reduce the amount of volume.

We creating again note, and then we can apply again, will you?

The value of zero means that our sound completely muted.

So by Putin's values between zero and one, we can control the amount of volume or even more.

We can add at some values more than one and amplifier with sound.

So when we create such a note, we need to connect up a graph.

We connected toe gain note and after that connect toe destination.

So let's let me show you how it looks like in real life.

So now it's a value of one, and I can reduce it to make it or even muted completely no sounds and come back.

I want to show how to great with the both order is distortion distortion.

Often Lee used in some rock music matter.

And so So, Actually it's a group off effect that change our input sine wave with some transfer full function.

So bit of history about specific back into times the equipment for guitarists wasn't that bad, is it?

And when it was broken, for example, speaker was cut off, the sound became deserted, but get replaced.

So much so they started to destroy their speakers themself.

After few years, adjust the semiconductor effect, inform off pedal was done by different producers.

As I said before, distortion is a group off effects.

It contains off overdrive, distortion and fuss.

Ah, again we can imagine our sound wave as a sign.

Uh, wait and ah, we applied way shape in a function to our ways and become more square doing that regenerating harmonics.

I was sound off some instrument, for example.

It gets one A domain frequency and a bunch off harmonics.

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賣掉放大器的人。如何用JS處理音樂｜Vitalii Bobrov｜JSConf Korea 2019 (The Man who Sold the Amp: How to Process Music with JS | Vitalii Bobrov | JSConf Korea 2019)

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basically