Here's a zip with more problem SNDH files :-)http://www.ym2149.com/sndh_dma_and_digi.zip
Some of them are using DMA (Atari STE and Falcon specific) so i don't know if thats the problem since other DMA tunes play fine (but without the DMA samples being heard)... "On_Behalf_Of_the_Queen.sndh" is included as an example of a DMA tune playong in AO.
The "Warp_digi.sndh" has some clicks/noise in it, even if digitunes don't sound good on the ST they don't sound that bad ;-)
A recording (ogg) from an ST of the warp tune is included.
Some newer Atari ST tunes use some sort of limited treble/bass control that only the STE has, not even Falcon has that.
Check out the "Bubble Days" mp3 and SNDH from the following link:http://dma-sc.atari.org/works.php?cat=st
The treble and bass is heard 1:20 in the tune.
There is no emulator SNDH player supporting that effect... maybe AO can be first :-)