Quoting Thor Andreassen :
> I've failed to turn up any evidence that it is possible, if it is, could
Steve Harris has a "Decimator" in his swh-plugins that reduces sample
rate : "Decimates (reduces the effective sample rate), and reduces the
bit depth of the input signal".
There's also a "Smooth Decimator"
As for increasing sample rate Ardour (at least) automagically
upsamples imported sounds to match the sample rate of the project.
Alternatively you could use sndfile-resample or sox to do that.
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