Holy s... it's hard to match leds to music

[shayvidas]

@gfvalvo

s likely limited by the required LED data transfer protocol, not the processor's speed.

Regarding code like this:

i know vixenlights it's an amazing software
but i dont know if you can use it together with arduino that is connecting leds

[StefanL38]

@gfvalvo

Yes, that's the normal way to use FastLED. The "buffer" is the array of CRGB objects. FastLED.show() is the display function.

This means there is a buffer in the microcontroller-software. But how long does it take to transfer the data from the microcontroller into the LED-string?
i.e. How much latency / "signal-propagation-delay" is there between microcontroller detected signal "switch-to-next-pattern" or executing the FastLED-show()-function and the LED-string really shows the light-pattern?

best regards Stefan

[shayvidas]

i never said it's wrong or right to right in a certain way
that may be.
just that it works as it is working no matter if it's the correct way to write it.

[anon57585045]

@shayvidas

just that it works as it is working no matter if it's the correct way to write it.

Only if you understand why, and document that. Even then, highly dubious. Because, what "just works" today, can break tomorrow, and you have no idea why or how to fix it.

[330R]

@gfvalvo

Regarding code like this:

@shayvidas

if (framesArray[frame] == "countDown"){

OP is doing it wrong no matter how stubbornly he insists otherwise.

This appears to work because the 2 sting literals are identical, so there really is only one of them, and the compiler assigns a single pointer to it. So the pointer is equal to itself, obviously. But doing comparisons like that, even if they sometimes work, is dangerous and can lead to subtle bugs. @PaulRB's version from post #3 is much safer.

[gfvalvo]

@StefanL38

But how long does it take to transfer the data from the microcontroller into the LED-string?

Like I said:

@gfvalvo

The speed is likely limited by the required LED data transfer protocol, not the processor's speed.

It's covered in the Datasheet. The processor will NEVER be the speed-limiting factor in this transfer.

[shayvidas]

@330R

rk because the 2 sting literals are identical, so there really is only one of them, and the compiler assigns a single pointer to it. So the pointer is equal to itself, obviously. But doing comparisons like that, even if they some

i agree
that the third post is a safer solution
and it only works because..
again agreed.

but again
this works for now , and this was only a test as i wrote in original post

and the original question wasn't on how to improve my already working code, to make it safer to write or to better write a specific equals

it was on the making the code fit to music better and best approach to handle that.

[StefanL38]

@gfvalvo

It's covered in the Datasheet. The processor will NEVER be the speed-limiting factor in this transfer.

I found there

Send data at speeds of 800Kbps

So this means 800.000 bits per second on 300 RGB-Leds this means

800000 / (300*24) = 111.11 frames per second

1 / 111.11 = 0,9 milliseconds signal-propagation-delay?
I guess this calculation is too simple

best regards Stefan

[shayvidas]

the thing is when i tried my code it usually at 2 frames a second works through the 2 minute song i mean i didn't see the leds lose sync

again i did it manualy start of the audio so if there was a mis sync it was probebly becaouse of me not pressing play on time
but when i did press it on time it kept sync throught the 2 min music

but making a third channel in an editing software feeding it to arduino. is a genius idea, but i'm sure many people did projects like did
did they all do something so complicated ?

There must be an easy simple solution for this

[shayvidas]

actually i found this tutorial

How To Control Pixel Light With Arduino And Vixen.

looks promising and +- what i need no ?

[StefanL38]

@shayvidas

what i need now ?

zero experience with that.
I guess asking in the Vixen-Forum will answer it

Do It Yourself Christmas

best regards Stefan

[shayvidas]

@shayvidas

in agreed.

but again
this works for now , and this was only a test as i wrote in original post

and the original question wasn't on how to improve my already working code, to make it safer to write or to better write a specific equals

it was on the making the code fit to m

yes i guess only using vixen is possible to achieve any normal way to handle that
and something like nodeMCU or Arduino both can work with Vixen

i assume that's how most people will do that