Library for samplerate conversion of audio data?

What is a good Delphi library for samplerate conversion of audio data? I don't mind paying for something.

I need to upsample and download sample audio in realtime. I understand the theory but don't want to write my own routines.

EDIT: Bonus points for something with Mac support.

Solution

Dew Research's DSP Master could be an option for you.

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