Re: [Rosegarden-user] Entering values for LADSPA plugins directly

2012-08-26 Thread Holger Marzen
On Sun, 26 Aug 2012, D. Michael McIntyre wrote:

> On Saturday, August 25, 2012, Holger Marzen wrote:
> 
> > I cannot set the values directly. Setting them with the mouse (turning
> > the knob) works but is way too coarse. Entering the value in the input
> > field or using up and down arrows always leads to the minimum value of
> > 0.25.
> 
> Same thing here with the latest development build.  You're not crazy.
> 
> Using the AM pitch shifter thing as a test bed, the knob that moves in 
> integer 
> increments seems to be working just fine.  The knob that lets you set a 
> floating point value has big problems.
> 
> The display appears to be limited to two decimal places of precision, but the 
> arrow buttons obviously let you make changes in finer increments than that.  
> The result is that you have to click repeatedly in order to see a visible 
> change.

That's not for every plugin a big problem. I noticed that the phaser
gets finer LFO-changes than those displayed. So if I klick the arrow 2
times then the 2-decimal-value doesn't change but the LFO-frequency
changes.

Back to the AM pitch shifter: Changing the values with an editor in the
.rg-file works. Not really user-friendly but it's a workaround. Frank
Zappa's advice in "The Slime" is "That's right, folks, don't touch that
dial!"

> Once you've made the change, either by using the arrow buttons or by typing a 
> value directly, that change gets corrupted somewhere along the way.  Try to 
> change to 1.03 and the result is the knob gets set to some fantastically 
> wrong 
> number like 1e-10.
> 
> That kind of wildly nonsensical number is usually an uninitialized variable, 
> but it seems like there could definitely be type conversion and/or precision 
> issues mixed up in here too.  I'm weak on floating point math, so this might 
> be a common pattern I don't even recognize.

My stomach says that it's a casting problem.

Unfortunately my Ubuntu 11.10 has not the needed library- and header
versions, so I can't compile RG here and try to find the bug

My holidays before christmas should give me the time zo update my Ubuntu
to 12.04 LTS.

Best Regards
Holger

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Re: [Rosegarden-user] Entering values for LADSPA plugins directly

2012-08-26 Thread D. Michael McIntyre
On Saturday, August 25, 2012, Holger Marzen wrote:

> I cannot set the values directly. Setting them with the mouse (turning
> the knob) works but is way too coarse. Entering the value in the input
> field or using up and down arrows always leads to the minimum value of
> 0.25.

Same thing here with the latest development build.  You're not crazy.

Using the AM pitch shifter thing as a test bed, the knob that moves in integer 
increments seems to be working just fine.  The knob that lets you set a 
floating point value has big problems.

The display appears to be limited to two decimal places of precision, but the 
arrow buttons obviously let you make changes in finer increments than that.  
The result is that you have to click repeatedly in order to see a visible 
change.

Once you've made the change, either by using the arrow buttons or by typing a 
value directly, that change gets corrupted somewhere along the way.  Try to 
change to 1.03 and the result is the knob gets set to some fantastically wrong 
number like 1e-10.

That kind of wildly nonsensical number is usually an uninitialized variable, 
but it seems like there could definitely be type conversion and/or precision 
issues mixed up in here too.  I'm weak on floating point math, so this might 
be a common pattern I don't even recognize.

I spent some time poking around, and only started to get the idea of how all 
of these many intricate little puzzle pieces fit together.  This would just 
take more time than I have to sort through and work out, but it's probably a 
really simple and obvious problem.
-- 
D. Michael McIntyre

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[Rosegarden-user] Entering values for LADSPA plugins directly

2012-08-25 Thread Holger Marzen
Hi all,

some plugins are unusable for me because I cannot enter arbitrary
values. The AM pitch shifter plugin has a range from 0.25 to 4. But I
cannot enter values directly. 

It doesn't seem to be a language problem (messing with , and .). Even if
I start Rosegarden with
  LANG=en_us.utf8 rosegarden
I cannot set the values directly. Setting them with the mouse (turning
the knob) works but is way too coarse. Entering the value in the input
field or using up and down arrows always leads to the minimum value of
0.25.

Rosegarden version is 11.06.

Any ideas?

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