Is there a way to sustain notes, make notes climb or shift pitch while sustained?

[The Guardian Fox]

I can only figure out how to make it so it sounds like each note is pressed, rather than sustained across a clip. Like, say I had a whistling sound in my pool. It would be like someone whistled twice, at different notes, rather than one continuous whistle that climbed... is there any way to achieve that? Or at least make the note be held?

[Mechanite]

Mess around with ENV Sustain, Decay, (bottom right of clip editor) and the GLIDE FX. Sustain & Decay for how long they make sounds, and GLIDE for that pitch shift you're looking for.

For samples that weren't designed to be repeated I usually mess around with the wave editor and have it loop back and forth if that makes any sense.