OMG ! The well known Atari STe emulator Steem got an update recently !!!
...and sounds are more accurate than ever !!! 
Get it here !!!
http://www.emucr.com/2012/10/steem-sse-v340.html
New features
--------------
- New machine options: STF ("wake up state 2") for funny differences (Forest,
Nostalgia menu); Mega STF 4 with blitter because we can afford it now.
- Auto-selection of TOS102 or 106 if they're available when switching STF/STE
- Can save memory state (and program works on restart) also with programs
using keyboard chip reprogramming (Dragonnels, Froggies, Transbeauce 2).
- The large display mode can be 400x275 or 400x278.
- Very large display mode is now 412x280.
- Stricter distinction between STF and STE for left border removal.
Programs that shouldn't work in STE mode include Omega Full Overscan, SNY/TCB,
SoWatt/Sync etc.
- Primitive low pass filter for STE sound.
- The same kind is used for STF sound instead of the former one, which maybe
was overkill, for a less muffled sound, also fine for samples (Mortville
Manor). New option.
- Using 3rd party DSP code by Maverick (Fabio Bizzetti) for Microwire controls
(volume, balance, bass & treble). New option 'STE Micreowire'.
- Some FDC fixes or hacks, the solid ones based on Hatari.
- 6301 true emu (using code by Arne Riiber and doc by Stephane Catala -
Belzebub / ST Connexion)
- All new options introduced with 'SSE' are now on their own option page. This
was very easy to do thanks to the way Steem originally was coded. Will make the
eventual Linux port easier too.
- Option 'Stealth Mode'
When you enable this option, Steem won't cooperate with programs trying
to assert if they run on an emulator. It may be useful if there are still
incurable hardware fanboys around producing worthwhile code that refuses
to run in emulators (I know of no case though), or if some hacker fixed
the program to adapt it to an emulation issue that has since been improved.
