Hmm. You should be able to change the sound config. with install.exe. Are you running it from the installed directory?
I have it set to use SB16 and it works fine. Here's my dosbox.conf if it's any help (mostly it's just default settings though)...
[sdl]
# fullscreen -- Start dosbox directly in fullscreen.
# fulldouble -- Use double buffering in fullscreen.
# fullfixed -- Don't resize the screen when in fullscreen.
# fullresolution -- What resolution to use for fullscreen, use together with fullfixed.
# output -- What to use for output: surface,overlay,opengl,openglnb,openglhq,ddraw,direct3d.
# hwscale -- Extra scaling of window if the output device supports hardware scaling.
# autolock -- Mouse will automatically lock, if you click on the screen.
# sensitiviy -- Mouse sensitivity.
# waitonerror -- Wait before closing the console if dosbox has an error.
# priority -- Priority levels for dosbox: lower,normal,higher,highest.
# Second entry behind the comma is for when dosbox is not focused/minimized.
# mapperfile -- File used to load/save the key/event mappings from.
# pixelshader -- Pixelshader program to use for resizing: none,point.fx,bilinear.fx,scale2x.fx,2xsai.fx.
fullscreen=false
fulldouble=false
fullfixed=false
fullresolution=1024x768
output=surface
hwscale=1.00
autolock=true
sensitivity=100
waitonerror=true
priority=higher,normal
mapperfile=mapper.txt
pixelshader=none
[dosbox]
# language -- Select another language file.
# memsize -- Amount of memory dosbox has in megabytes.
# machine -- The type of machine tries to emulate:hercules,cga,tandy,vga.
# captures -- Directory where things like wave,midi,screenshot get captured.
language=
machine=vga
captures=capture
memsize=16
[render]
# frameskip -- How many frames dosbox skips before drawing one.
# aspect -- Do aspect correction.
# scaler -- Scaler used to enlarge/enhance low resolution modes.
# Supported are none,normal2x,advmame2x,advmame3x,advinterp2x,interp2x,tv2x,hq2x.
frameskip=0
aspect=false
scaler=normal2x
[cpu]
# core -- CPU Core used in emulation: simple,normal,full,dynamic.
# cycles -- Amount of instructions dosbox tries to emulate each millisecond.
# Setting this higher than your machine can handle is bad! (unless timesynched is set)
# cycleup -- Amount of cycles to increase/decrease with keycombo.
# cycledown Setting it lower than 100 will be a percentage.
# timesynched -- Do not emulate more cycles than possible.
# showcycles -- Display the number of emulated cycles in the titlebar (uses some CPU).
core=normal
cycles=10000
cycleup=200
cycledown=200
timesynched=true
showcycles=true
[mixer]
# nosound -- Enable silent mode, sound is still emulated though.
# rate -- Mixer sample rate, setting any devices higher than this will
# probably lower their sound quality.
# blocksize -- Mixer block size, larger blocks might help sound stuttering
# but sound will also be more lagged.
# prebuffer -- How many milliseconds of data to keep on top of the blocksize.
nosound=false
rate=22050
blocksize=2048
prebuffer=10
[midi]
# mpu401 -- Enable MPU-401 Emulation.
# intelligent -- Operate in Intelligent mode.
# device -- Device that will receive the MIDI data from MPU-401.
# This can be default,alsa,oss,win32,coreaudio,mt32,none.
# mt32rate -- Sample rate of MT32 emulation
# config -- Special configuration options for the device. In Windows put
# the id of the device you want to use. See README for details.
mpu401=true
intelligent=true
device=default
mt32rate=22050
config=
[sblaster]
# type -- Type of sblaster to emulate:none,sb1,sb2,sbpro1,sbpro2,sb16.
# base,irq,dma,hdma -- The IO/IRQ/DMA/High DMA address of the soundblaster.
# mixer -- Allow the soundblaster mixer to modify the dosbox mixer.
# oplmode -- Type of OPL emulation: auto,cms,opl2,dualopl2,opl3.
# On auto the mode is determined by sblaster type.
# oplrate -- Sample rate of OPL music emulation.
type=sb16
base=220
irq=7
dma=1
hdma=5
mixer=true
oplmode=auto
oplrate=22050
[gus]
# gus -- Enable the Gravis Ultrasound emulation.
# base,irq1,irq2,dma1,dma2 -- The IO/IRQ/DMA addresses of the
# Gravis Ultrasound. (Same IRQ's and DMA's are OK.)
# rate -- Sample rate of Ultrasound emulation.
# ultradir -- Path to Ultrasound directory. In this directory
# there should be a MIDI directory that contains
# the patch files for GUS playback. Patch sets used
# with Timidity should work fine.
gus=true
rate=22050
base=240
irq1=5
irq2=5
dma1=3
dma2=3
ultradir=C:\ULTRASND
[speaker]
# pcspeaker -- Enable PC-Speaker emulation.
# pcrate -- Sample rate of the PC-Speaker sound generation.
# tandyrate -- Sample rate of the Tandy 3-Voice generation.
# Tandysound emulation is present if machine is set to tandy.
# disney -- Enable Disney Sound Source emulation.
pcspeaker=true
pcrate=22050
tandyrate=22050
disney=false
[bios]
# joysticktype -- Type of joystick to emulate: none, 2axis, 4axis,
# fcs (Thrustmaster) ,ch (CH Flightstick).
# none disables joystick emulation.
# 2axis is the default and supports two joysticks.
joysticktype=2axis
[serial]
# serial1-4 -- set type of device connected to com port.
# Can be disabled, dummy, modem, directserial.
# Additional parameters must be in the same line in the form of
# parameter:value. Parameters for all types are irq, startbps, bytesize,
# stopbits, parity (all optional).
# for directserial: realport (required).
# for modem: listenport (optional).
serial1=dummy
serial2=dummy
serial3=disabled
serial4=disabled
[dos]
# xms -- Enable XMS support.
# ems -- Enable EMS support.
# umb -- Enable UMB support (false,true,max).
xms=true
ems=true
umb=true
[autoexec]
# Lines in this section will be run at startup.
