MPD can use the famous soxr library for resampling. Soxr is very flexible with the configuration of the resampler. Only MPD only provide the default recipes with the quality setting. You can find a lot on internet about the usage of soxr or sox (the commandline version of soxr) , including a kind of measurements. …
More MPD soxr selective resample modes
Earlier I wrote about moOde with MPD Selective Resample about sox and resample. With selective resample takes in account if source sample rate is multiple of 44.1kHz or 48kHz. With selective resample the target sample rate is a integer multiply of source sample rate. Sox with integer ratio only cost 50% of the CPU resource. …