Youlean LOG x?

by **nix** » Thu Apr 30, 2015 12:25 am

Hey peeps,
Just had a question and request I think to Youlean.
Did you manage to log the x?
I've been trying to solve this puzzle.
If you got it,
could I possibly get the schematic?
If it's solved perhaps I can quash my compulsion to keep trying.
Cheers hehe

He had a thread here which he deleted I think

by **MyCo** » Thu Apr 30, 2015 5:46 am

I've done log x for spectrum analyzer in Ruby. It also has different interpolations to smooth out the results.

Take a look at the module at the bottom right "FFT To Graph" in the attached schematic. The schematic is a mess right now, I tried to build a full spectrum analyzer that would replace the old one that is not really accurate. It's a never finished project...

To test this, you have to go to the top level schematic and load in a wave ("Stream Wave (MyCo)" Module) to play back. It's using the stream primitive, so not all waves/mp3 are supported.

by **nix** » Thu Apr 30, 2015 6:11 am

wow Myco-- impressive
I will look at it and see what I can use, much thanks
This is the simple problem,
Youlean I apologize if you didn't want this back up->

Log help.fsm: (1.98 KiB) Downloaded 820 times

We both attempted to log Y.
Can you do this with green Myco?
quite simply for us simpletons hehe
Don't worry about it though if it's a hassle.
I spent an hour trying to get it.
Cheers!

by **Youlean** » Thu Apr 30, 2015 9:09 am

Hey, I have found the solution, that's way I deleted thread. What bothered me is that I needed to exclude first 20Hz...

by **Youlean** » Thu Apr 30, 2015 9:15 am

MyCo wrote:I've done log x for spectrum analyzer in Ruby. It also has different interpolations to smooth out the results.

Take a look at the module at the bottom right "FFT To Graph" in the attached schematic. The schematic is a mess right now, I tried to build a full spectrum analyzer that would replace the old one that is not really accurate. It's a never finished project...

To test this, you have to go to the top level schematic and load in a wave ("Stream Wave (MyCo)" Module) to play back. It's using the stream primitive, so not all waves/mp3 are supported.

My plan is to rebuild whole spectrum analyzer in dll. I am now doing array log and resample (it will have 9 different interpolation methods), next I will try to build FFT, that would be a challenge for me as I am still not sure how to build it, maybe I will try first doing it in green and then to translate in dll, but here I will need help...

by **nix** » Thu Apr 30, 2015 9:37 am

Thanks Youlean,
I'll save this schematic mate
Well done to solve it- it really had(has hehe) me puzzling
and-thanks again Myco

by **Youlean** » Thu Apr 30, 2015 9:47 am

nix wrote:it really had(has hehe) me puzzling

Me too.... No prob..

by **MyCo** » Thu Apr 30, 2015 9:59 am

Maybe that helps to make it simpler :mrgreen:

by **nix** » Thu Apr 30, 2015 10:29 am

Cheers!
I can understand how to write it in more than one way now,
but I prolly would never have got 1000 for the base, and the variable for exponent.
hmm
I gotta try plugging some figures into the log10 too, I thought that might have been involved
Thanks for the time to do it differently Maik, I'll keep this one too

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