The name "Ardour" came from considerations of how to pronounce the acronym HDR. The most obvious attempt sounds like a vowel-less "harder" and it then was then a short step to an unrelated but slightly homophonic word:

ardour n 1: a feeling of strong eagerness (usually in favor of a person or cause); "they were imbued with a revolutionary ardor"; "he felt a kind of religious zeal" [syn: ardor, elan, zeal]
2: intense feeling of love [syn: ardor]
3: feelings of great warmth and intensity; "he spoke with great ardor" [syn: ardor, fervor, fervour, fervency, fire, fervidness]

Given the work required to develop Ardour, and the personality of its primary author, the name seemed appropriate even without the vague relationship to HDR.

Years later, another interpretation of "Ardour" appeared, this time based on listening to non-native English speakers attempt to pronounce the word. Rather than "Ardour", it became "Our DAW", which seemed poetically fitting for a Digital Audio Workstation whose source code and design belongs to a group of collaborators.