For future reference, the available low pass filters in MC for DSD to PCM conversion are not optimal, shall we say. The default one is at 24 KHz with a slope of 48 dB/octave. This is well below the Sony/Philips standard of 50 Khz. It was set at this relatively low frequency to accommodate a particular DAC in the early days that could not handle higher frequencies. The optional filters at 30 KHz and 50 KHz only have slopes of 24 dB/octve which is not step enough to filter out the high frequency noise. This is a long standing concern with DSD to PCM conversion, but there does not seem to be any interest in changing the filters going forward.
Personally, I set the filter option to Off and use a 60 KHz filter with a slope of 48 dB/octave set in DSP Studio. If you are doing file conversion, I would suggest doing the filtering when you do file conversion, in case you change DACs and the new DAC does not handle the high frequencies as well as the Arcam.