QWERTY Caster - Universitat Pompeu Fabra

Hold / return / bypass /skip
Return or hold refers to whether a parameter returns (snaps back)
to a nominal value (as the pitchbend wheel in most MIDI keyboards)
or keeps it position upon release (as the modulation wheel in most
MIDI keyboards).
Bypass can be seen as the combination of return and hold, or as
the quick alternation between two values, one of them being
typically a zero effect position.
Skip reflects the ability to have direct access to arbitrary values.
Most controllers do not allow this and are forced to traverse
intermediate values instead. An example of a controller able to
skip is the ribbon present in several analog synthesizers from the
1960s and 1970s (Pressing 1990).
Sergi Jordà, Music Technology Group
IUA, UPF – Barcelona, 2008