"You can have it done cheap, you can have it done fast, you can have it done well — choose two."
So why are we asking about audio quality? Low-quality audio, all things being equal, would produce a low-quality transcript. In that case, in order to maintain quality, we need to adjust one of the other sides of the triangle. We would need to either add more people to the job (increased price), or give the current people more time (deceased speed).