the sampling frequency affects the filter. At Nyquist you will not get a clean signal out. At high sampling rates the low frequencies would require a long filter chain to save all the values. My best experiences are at rates of 20-100 * Nyquist. Care must be taken so that the real taken sps matches the value set.
Totally off topic but this thread gave me a laugh over the weekend.
Bob, the forum very kindly told me that you had replied to my question. You replied on 5/2/2016 and I had read the response shortly after you posted it. I get the email 14/2/2016 some 8 days later!