Learn Dutch: Hoe hard je ook blaast, deze dwarsfluit maakt geen geluid. - However hard you blow, this flute makes no sound.

It changes the meaning from a simple question ("How hard are you blowing?") to a concessive statement ("However hard you blow" or "No matter how hard you blow"). The combination of Hoe + adjective/adverb + ook is the standard way to express "no matter how..." in Dutch.

Normally, starting a sentence with a subclause triggers inversion (verb before subject) in the main clause. Why is it deze dwarsfluit maakt instead of maakt deze dwarsfluit?

That is a great spot! Concessive clauses with ook (like Hoe hard je ook blaast or Wat er ook gebeurt) are a notable exception to the V2 (verb-second) rule. They are treated as an introductory phrase sitting slightly outside the main sentence. Because of this, the main clause simply starts fresh with standard Subject-Verb word order (deze dwarsfluit maakt).

Why is the verb blaast placed at the end of the first clause?

The structure Hoe hard ... ook introduces a subordinate clause. Just like with conjunctions such as omdat or hoewel, this forces the conjugated verb (blaast) to the end of its own clause.

What is the difference between a dwarsfluit and a regular fluit?