The scope of this post is not to set up a complete DOSBOX environment for the Lemmings games. However, if you want sound and your configuration isn't giving you any, read on.
Lemmings
For tandy sound... (sounds a bit like an 8-bit video game console)
Insert the following into your dosbox.conf
[speaker]
pcspeaker=true
pcrate=22050
tandy=on
tandyrate=22050
[sblaster]
sbtype=none
[dosbox]
machine=tandy
Run TGALEMMI.EXE
For SoundBlaster sound... (best sound quality for this version of Lemmings)
Insert the following into your dosbox.conf
[sblaster]
sbtype=sb16
[dosbox]
machine=vga
Run VGALEMMI.EXE
Lemmings 2: The Tribes
For tandy sound...
Insert the following into your dosbox.conf
[speaker]
pcspeaker=true
pcrate=22050
tandy=on
tandyrate=22050
[sblaster]
sbtype=none
[dosbox]
machine=vga
Run INSTALL.EXE and set the sound to Tandy
Run L2-FIX.COM
For SoundBlaster sound...
Insert the following into your dosbox.conf
[sblaster]
sbtype=sb16
[dosbox]
machine=vga
Run INSTALL.EXE and set the sound to AdLib or SoundBlaster
Run L2-FIX.COM
For Roland sound...
Insert the following into your dosbox.conf
[midi]
mpu401=intelligent
device=win32 (change to alsa for linux, change to coreaudio for Mac OS X)
[dosbox]
machine=vga
Run INSTALL.EXE and set the sound to Roland
Run L2-FIX.COM
For Roland sound with SoundBlaster effects...
Insert the following into your dosbox.conf
[midi]
mpu401=intelligent
device=win32 (change to alsa for linux, change to coreaudio for Mac OS X)
[sblaster]
sbtype=sb16
[dosbox]
machine=vga
Run INSTALL.EXE and set the sound to Roland with Blaster Effects
Run L2-FIX.COM
All New World of Lemmings
For SoundBlaster sound...
Insert the following into your dosbox.conf
[sblaster]
sbtype=sb16
[dosbox]
machine=vga
Run INSTALL.EXE and set the sound to AdLib or SoundBlaster
Run L3CD.EXE
For Gravis UltraSound sound... (best sound quality for this version of All New World of Lemmings)
Insert the following into your dosbox.conf
[gus]
gus=true
[dosbox]
machine=vga
Run INSTALL.EXE and set the sound to Gravis UltraSound
Run L3CDGUS.EXE