[Coyoteous]

Which LP mode(s) did you compare?

To change the processing mode, use the Processing seting in the bottom bar of the interface.

- Zero latency mode is the default. While it introduces phase changes, it is CPU-efficient and doesn't result in any latency, so it is the best mode for e.g. live usage. Also, it's quite possible you might like the coloration introduced by the phase changes when mixing, for example.

- Linear Phase - Low Latency provides linear-phase processing with a minimal latency. Use only with low Q settings, or when only changing the mid-high part of the spectrum. With a sample rate of 44.1 kHz, it results in a total latency of 3072 samples (about 70 ms).

- Linear Phase - Medium Latency is a good compromise between low-frequency resolution and latency and we recommend to use this in general for linear-phase processing. The total latency is 6144 samples at a sample rate of 44.1 kHz (about 139 ms).

- Linear Phase - High Latency gives very good low-frequency resolution. If you need to use high Q settings when changing the low end of the spectrum, use this mode. The total latency is 12288 samples at a sample rate of 44.1 kHz (about 279 ms).

- Linear Phase - Maximum Latency results in even better low-frequency resolution at the expense of latency and possible pre-echo problems. The total latency here is 24576 samples at a sample rate of 44.1 kHz (about 557 ms).

To conclude, Pro-Q lets you freely choose between zero-latency and linear-phase processing as you go. If you use high Q settings combined with low-frequency filtering, you need to use a higher latency; if you only work on the mid-high frequencies, you can get by with a lower latency.