Knob controls

Abstract
Switches and dials for audio interfaces.
Types
Various form element replacements (default width: 48px), respecting tab order, and reacting to mouse/tap and keyboard as usual:
Switch
Substitute for <input type=checkbox>.
To be toggled via click or
Space
.
Mode
Dial
Substitute for <input type=range>.
Bar angle size: 270°.
Changed via drag or keys
↑
↓
←
→
,
Pg↑
Pg↓
(±10),
Pos1
End
.		Simple linear range (normalized [0…1]); here mapped to % values [0…100].
Vol
%
Linear minus/plus range (normalized [-1…0…1]); here mapped to % values [-100…0…100].
L/R
%
Special range: linear + log (normalized [0…1]); here mapped to [0…9, 10…9999].
Rel
ms