When it comes to final format delivery, sample rate conversion is an integral step in the process. The Goodhertz Sample Rate Converter has the ideal balance between frequency response and transient response — two of the most important characteristics of any sample rate converter. This means that it does its job with the least possible sonic impact, preserving crystal-clear high end while also maintaining sharp transients. The Goodhertz SRC has virtually zero aliasing (sampling artifacts) with performance better than -192 dB, meaning it is error-free at lowest amplitudes. In Myriad, you'll see three controls in the Change Sample Rate (Goodhertz) Action:
Sample Rate: The desired sample rate for the conversion (8k - 192kHz).
Filter Types: The cutoff filter type for the converter (Linear or Minimum Phase, further described below).
Quality: The quality of the conversion (Low, Medium, High, Highest). Using the Highest setting will result in a slower conversion, but the result will be superior.
Linear Phase offers:
- Perfect, linear phase response
- High latency
- Both pre- & post-ring
Minimum Phase offers:
- Some phase deviation
- Low latency
- Post-ring only
The main tradeoff between minimum and linear phase sample rate converter is between phase response and transient response. Minimum phase designs have the advantage of no pre-ring, which some feel gives a psychoacoustically advantageous transient response, but they also have the disadvantage of a less-than-perfect phase response. Linear phase designs, on the other hand, have a perfect phase response but contain pre-ringing, which can have a smearing effect on sharp transients.
Whether you choose linear or minimum phase depends on your particular application and tastes. Our advice is to try a couple of conversions, perhaps even a few in a row (96kHz → 44.1kHz → 96kHz → 44.1kHz), for both minimum and linear phase, and see what differences you can identify. If you can't hear the difference, it's safe to stick with linear.