[LAD] User eXperience in Linux Audio
len at ovenwerks.net
Wed Apr 22 13:34:25 UTC 2015
> On Wed, Apr 22, 2015 at 6:05 AM, Louigi Verona <louigi.verona at gmail.com> wrote:
> Linux Audio packages are plagued by reasons that are relevant to the
> developer, but which should be irrelevant to the user.
> I don't care if dev thinks knobs are a bad idea, I want a knob and
> not a text field, because it is easier to use on stage.
> I don't care if dev has a technical reason to have a text field
> instead of a knob. I need a knob, because it is easier to use on
Years ago, I had a sequencer program that had no knobs. It had only text
fields. However, holding the mouse button down and moving the mouse up or
down (maybe side to side as well) adjusted the value with no text input
required. The mouse pointer may end up way off the value it was adjusting
but that was fine. While it was possible to make knob pictures with the
graphics lib at that time (Atari ST actually) the monitor resolution was
low and the author was trying to put (probably too) many controls on the
A knob is ok if it works similar. Knobs that insist that I touch the knob
pointer and move that in a tiny arch to adjust and where the pointer flips
from one end to the other if I make the wrong move are not easier to move
on stage... A knob picture is fine, it shows the user "this is a
continuously variable control" while using a lot less screen realestate
than a slider would. A knob that looks like a knob but works like a slider
is what is needed. Being able to change value by moving the knob (or
trying to) up and down or left and right is much more usable than trying
to move the mouse in tiny circles. I would suggest being able to adjust
using both up/down and left/right so that controls can be close to screen
edge and still work.
As I said above, a text field can work the same way and give a more
acurate value indication... though a knob position may be enough gives a
quick visual relative idea that may be more useful.
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