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Re: Inspirational exercise!
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Re: Inspirational exercise!


  • Subject: Re: Inspirational exercise!
  • From: Arthur Clemens <email@hidden>
  • Date: Thu, 3 Oct 2002 18:34:51 +0200

On donderdag, okt 3, 2002, at 17:28 Europe/Amsterdam, Thomas Hudson wrote:

Knob widgets that use rotation to adjust are hideously wrong. However,
a knob that uses slider-like linear motion is quite natural to use.

The problem is that it *looks* like you should turn, although you can drag it.
So it has the wrong shape - and moreover once clicked it does not give feedback where to go with the mouse. So for instance the indicator on the knob points at 4 o'clock (down right). The sound level is at 9. You want to decrease the sound level so you click on the knob. If you would turn the knob with you hand, you would turn it counterclockwise - that is turn the indicator first upwards and then downwards to the left. Now if the knob works like a slider and you move upwards (like in the real world), the sound level increases to 10. Wrong! You need to drag it downwards to turn down the volume. The visual appearance never indicated that.

The Bias Freq knobs are better that you can see immediately that it is a slider. But still the appearance shows you should move your mouse in a circular movement, first up then down to the left.
*If* you can move the mouse sideways to adjust the level, there is nothing in the interface that indicates that.



But knobs are a requirement for saving screen real estate. If you don't
believe me, fire up IB and design an interface using only sliders for
an eight channel mixer with volume, pan, treble, bass, fx send 1, fx
send2, etc. You might be able to fit it all on the screen, but it will
look horrible.

There are other ways to save space.


Arthur
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