'[#[Description]
Unlike other chiptune '[[Atari ST (console)] formats, the SNDH file format contains not only the song data but also its 68000 assembly replay routine, and a header with additional data. For many years it has been the standard on the scene. Because of the file system limitations, Atari ST files have a 3-letters extension (.snd), while modern computers can use the unambiguous .sndh extension. Here is the '[l[http://sndh.atari.org/about.php[history] of the format.

'[#[Relevance to botb]
.snd/.sndh files can be submitted to the '[icon[formats/aym] '[[aym (format)] competitions.

'[#[Software]
Because of the nature of the format, trackers can only load their own sndh's. You cannot open with maxYMiser a .snd file saved by MusicMon or converted from another tracker, and vice-versa. So before you start trying to load a .snd to a tracker, make sure it was made by that same tracker. Otherwise the ST will probably crash. Trackers come with example songs, use those to discover.

'[t[b1]Trackers'[/t]
- '[[maxYMiser] (Atari ST/Falcon)
- '[[MusicMon] (Atari ST)
- '[[Ttrak] (Atari ST)

'[t[b1]Players'[/t]
- '[l[http://bulba.untergrund.net/emulator_e.htm[AY_emul] (Linux/Windows)
- '[l[http://bulba.untergrund.net/ayplayer_e.htm[MicroST] (Linux/Windows)
- '[l[http://creamhq.de/jam.php[Just Another Musicplayer] (Atari ST/Windows)

'[t[b1]Converter'[/t]
- '[l[http://sndh.atari.org/tools.php[SNDHconv] (Atari ST/TT/Falcon) converts from several ST YM2149 trackers to SNDH standard.

'[#[Technical information]
Technical information is available from '[l[http://sndh.atari.org/fileformat.php[sndh.atari.org].

'[#[Other uses of same extension]
The .sndh extension is unambiguous, but its 3-letters variant .snd  has many other uses, mostly related to sound:

- Amiga IFF/8SVX Sound
- Sun/NeXT/Tandy/Apple
- AKAI MPC-series sample
- Macintosh Resource Fork sound
- Unix audio file

As well as some unrelated uses:

- Heroes of Might & Magic 3 archive
- Sega FILM/CPK file format

'[#[See also]
'[[AY YM (soundchip)]
'[[Atari ST (console)]
'[[aym (format)]
'[[.ym (file)]
'[l[http://sndh.atari.org/download.php[SNDH archive] (nearly 5k tunes from games, demos...)