Topic: Random speed, what is it for?

Hi,

I discovered the "condition" window.
There are 2 options. The first one has a very clear effect on the "piano state", from perfect to worst, in simple words.

But, the "random speed", what is it for?
There are only poor informations on the manual and I can't hear a great diference when I change the values.

Thanks in advance,

SK

Re: Random speed, what is it for?

It's not "speed", it's "seed".

http://en.wikipedia.org/wiki/Random_seed

Hard work and guts!

Re: Random speed, what is it for?

stamkorg wrote:

But, the "random speed", what is it for?
There are only poor informations on the manual and I can't hear a great diference when I change the values.

Thanks in advance,

SK

As EvilDragon says, it's "random seed", not "random speed". The help text states that changing this parameter "allows you to enjoy thousands of broken instrument variations". I presume this means that, for a given position of the condition slider, each setting of the random seed parameter will result in a different set of perturbations to the model parameters. It doesn't mean the instrument will sound more worn out or less worn out, just different, but of course this may not be audibly apparent without very careful comparison.

I assume that Modartt uses what's called a "pseudo random number generator" to generate random deviations from the preset values for each model parameter. These algorithms are based on a seed value. For example, if you start from a particular seed value and then use the algorithm to generate a sequence of 1000 "random" numbers you will always end up with the same sequence of 1000 numbers.  Changing the seed value enables you to generate a different set of apparently random values. In many computer applications the random seed is generated based on date and time of day. Modartt's approach means that if you generate a particular broken instrument that you like you can save the "random seed" and "wear and tear" parameter values and restore them at a later date to reproduce the same instrument !

Re: Random speed, what is it for?

johng wrote:
stamkorg wrote:

But, the "random speed", what is it for?
There are only poor informations on the manual and I can't hear a great diference when I change the values.

Thanks in advance,

SK

As EvilDragon says, it's "random seed", not "random speed". The help text states that changing this parameter "allows you to enjoy thousands of broken instrument variations". I presume this means that, for a given position of the condition slider, each setting of the random seed parameter will result in a different set of perturbations to the model parameters. It doesn't mean the instrument will sound more worn out or less worn out, just different, but of course this may not be audibly apparent without very careful comparison.

I assume that Modartt uses what's called a "pseudo random number generator" to generate random deviations from the preset values for each model parameter. These algorithms are based on a seed value. For example, if you start from a particular seed value and then use the algorithm to generate a sequence of 1000 "random" numbers you will always end up with the same sequence of 1000 numbers.  Changing the seed value enables you to generate a different set of apparently random values. In many computer applications the random seed is generated based on date and time of day. Modartt's approach means that if you generate a particular broken instrument that you like you can save the "random seed" and "wear and tear" parameter values and restore them at a later date to reproduce the same instrument !

Nice explanation, except as there are four digits, and that makes 10,000 variations for Random Seed, not 1000.

Pianoteq 6 Std, Bluthner, Model B, Grotian, YC5, Hohner, Kremsegg #1, Electric Pianos. Roland FP-90, Windows 10 quad core, Xenyx Q802USB, Yamaha HS8 monitors, Audio Technica
ATH-M50x headphones.

Re: Random speed, what is it for?

EvilDragon wrote:

It's not "speed", it's "seed".

http://en.wikipedia.org/wiki/Random_seed

You are right, sorry...

So there is no logical order here, right?

We can not say that 2000 is something more than 1800, but just different, am I right?

Re: Random speed, what is it for?

stamkorg wrote:

So there is no logical order here, right?

We can not say that 2000 is something more than 1800, but just different, am I right?

That's correct.

Re: Random speed, what is it for?

beakybird wrote:

Nice explanation, except as there are four digits, and that makes 10,000 variations for Random Seed, not 1000.

I didn't say there were a thousand values of random seed. I said that if you set a particular value of random seed for a random number generator and then generate a sequence of 1000 values from it you will always get the same sequence. If you select a different value of random seed you will get a different set, and so on. I don't know how many values Modartt generate from  particular seed value. It may well be more than 1000 because there are multiple parameters for each note on the keyboard.