O modo mais fácil de instalar e configurar sua placa de som no Linux é através do utilitário sndconfig. Esse utilitário grava as configurações da placa no arquivo /etc/conf.modules. Mas nem sempre isso funciona sem provocar conflitos em outros dispositivos. Se for o caso, execute o sndconfig seguido do parâmeto noprobe. Dessa forma as configurações não serão detectadas automaticamente permitindo que você as selecione. Ou ainda se você preferir. Edite o arquivo /etc/conf.modules e inclua as seguintes linhas:

alias sound sb
alias midi opl3
options opl3 io=0x388
options sb io=0x220 irq=5 dma=0 
dma16=5 mpu_io=0x330

Confira se as configurações estão corretas. Você pode fazer isso comparando com as configurações do Windows. Para testar se há algum problemas digite modprobe sb, depois modeprob opl3 e se você tiver placa de rede, execute modeprobe ne. Caso apareça algum erro durante a execução edite o arquivo /etc/isapnp.conf. Deverá aparecer algo parecido com o seguinte:

# $Id: pnpdump.c,v 1.18 1999/02/14 22:47:18 fox Exp $
# This is free software, see the sources for details.
# This software has NO WARRANTY, use at your OWN RISK
#
# For details of this file format, see isapnp.conf(5)
#
# For latest information and FAQ on isapnp and pnpdump see:
# http://www.roestock.demon.co.uk/isapnptools/
#
# Compiler flags: -DREALTIME -DNEEDSETSCHEDULER -DABORT_ONRESERR
#
# Trying port address 0203
# Trying port address 020b
# Board 1 has serial identifier 6f 09 30 e3 80 02 30 8c 0e

# (DEBUG)
(READPORT 0x020b)
(ISOLATE PRESERVE)
(IDENTIFY *)
(VERBOSITY 2)
(CONFLICT (IO FATAL)(IRQ FATAL)(DMA FATAL)(MEM FATAL)) # or WARNING

# Card 1: (serial identifier 6f 09 30 e3 80 02 30 8c 0e)
# Vendor Id CTL3002, Serial Number 154198912, checksum 0x6F.
# Version 1.0, Vendor version 3.0
# ANSI string -->Creative Phone Blaster 28.8/33.6<--
#
# Logical device id CTL0031
#     Device supports vendor reserved register @ 0x38
#     Device supports vendor reserved register @ 0x3a
#     Device supports vendor reserved register @ 0x3d
#
# Edit the entries below to uncomment out the configuration required.
# Note that only the first value of any range is given, this may be changed if required
# Don't forget to uncomment the activate (ACT Y) when happy

(CONFIGURE CTL3002/154198912 (LD 0
#     ANSI string -->Audio<--

# Multiple choice time, choose one only !

#     Start dependent functions: priority preferred
#       IRQ 5.
#             High true, edge sensitive interrupt (by default)
(INT 0 (IRQ 5 (MODE +E)))
#       First DMA channel 1.
#             8 bit DMA only
#             Logical device is not a bus master
#             DMA may execute in count by byte mode
#             DMA may not execute in count by word mode
#             DMA channel speed in compatible mode
(DMA 0 (CHANNEL 1))
#       Next DMA channel 5.
#             16 bit DMA only
#             Logical device is not a bus master
#             DMA may not execute in count by byte mode
#             DMA may execute in count by word mode
#             DMA channel speed in compatible mode
(DMA 1 (CHANNEL 5))
#       Logical device decodes 16 bit IO address lines
#             Minimum IO base address 0x0220
#            Maximum IO base address 0x0220
#             IO base alignment 1 bytes
#             Number of IO addresses required: 16
(IO 0 (SIZE 16) (BASE 0x0220))
#       Logical device decodes 16 bit IO address lines
#             Minimum IO base address 0x0330
#             Maximum IO base address 0x0330
#             IO base alignment 1 bytes
#             Number of IO addresses required: 2
(IO 1 (SIZE 2) (BASE 0x0330))
#       Logical device decodes 16 bit IO address lines
#             Minimum IO base address 0x0388
#             Maximum IO base address 0x0388
#             IO base alignment 1 bytes
#             Number of IO addresses required: 4
(IO 2 (SIZE 4) (BASE 0x0388))

#       Start dependent functions: priority acceptable
#       IRQ 5, 7 or 10.
#             High true, edge sensitive interrupt (by default)
# (INT 0 (IRQ 5 (MODE +E)))
#       First DMA channel 0, 1 or 3.
#             8 bit DMA only
#             Logical device is not a bus master
#             DMA may execute in count by byte mode
#             DMA may not execute in count by word mode
#             DMA channel speed in compatible mode
# (DMA 0 (CHANNEL 0))
#       Next DMA channel 5, 6 or 7.
#             16 bit DMA only
#             Logical device is not a bus master
#             DMA may not execute in count by byte mode
#             DMA may execute in count by word mode
#             DMA channel speed in compatible mode
# (DMA 1 (CHANNEL 5))
#       Logical device decodes 16 bit IO address lines
#             Minimum IO base address 0x0220
#             Maximum IO base address 0x0280
#             IO base alignment 32 bytes
#             Number of IO addresses required: 16
# (IO 0 (SIZE 16) (BASE 0x0220))
#       Logical device decodes 16 bit IO address lines
#             Minimum IO base address 0x0300
#             Maximum IO base address 0x0330
#             IO base alignment 48 bytes
#             Number of IO addresses required: 2
# (IO 1 (SIZE 2) (BASE 0x0300))
#       Logical device decodes 16 bit IO address lines
#             Minimum IO base address 0x0388
#             Maximum IO base address 0x0388
#             IO base alignment 1 bytes
#             Number of IO addresses required: 4
# (IO 2 (SIZE 4) (BASE 0x0388))

#       Start dependent functions: priority acceptable
#       IRQ 5, 7 or 10.
#             High true, edge sensitive interrupt (by default)
# (INT 0 (IRQ 5 (MODE +E)))
#       First DMA channel 0, 1 or 3.
#             8 bit DMA only
#             Logical device is not a bus master
#             DMA may execute in count by byte mode
#             DMA may not execute in count by word mode
#             DMA channel speed in compatible mode
# (DMA 0 (CHANNEL 0))
#       Next DMA channel 5, 6 or 7.
#             16 bit DMA only
#             Logical device is not a bus master
#             DMA may not execute in count by byte mode
#             DMA may execute in count by word mode
#             DMA channel speed in compatible mode
# (DMA 1 (CHANNEL 5))
#       Logical device decodes 16 bit IO address lines
#             Minimum IO base address 0x0220
#             Maximum IO base address 0x0280
#             IO base alignment 32 bytes
#             Number of IO addresses required: 16
# (IO 0 (SIZE 16) (BASE 0x0220))
#       Logical device decodes 16 bit IO address lines
#             Minimum IO base address 0x0300
#             Maximum IO base address 0x0330
#             IO base alignment 48 bytes
#             Number of IO addresses required: 2
# (IO 1 (SIZE 2) (BASE 0x0300))

#       Start dependent functions: priority functional
#       IRQ 5, 7 or 10.
#             High true, edge sensitive interrupt (by default)
# (INT 0 (IRQ 5 (MODE +E)))
#       First DMA channel 0, 1 or 3.
#             8 bit DMA only
#             Logical device is not a bus master
#             DMA may execute in count by byte mode
#             DMA may not execute in count by word mode
#             DMA channel speed in compatible mode
# (DMA 0 (CHANNEL 0))
#       Next DMA channel 5, 6 or 7.
#             16 bit DMA only
#             Logical device is not a bus master
#             DMA may not execute in count by byte mode
#             DMA may execute in count by word mode
#             DMA channel speed in compatible mode
# (DMA 1 (CHANNEL 5))
#       Logical device decodes 16 bit IO address lines
#             Minimum IO base address 0x0220
#             Maximum IO base address 0x0280
#             IO base alignment 32 bytes
#             Number of IO addresses required: 16
# (IO 0 (SIZE 16) (BASE 0x0220))

#       Start dependent functions: priority functional
#       IRQ 5, 7 or 10.
#             High true, edge sensitive interrupt (by default)
# (INT 0 (IRQ 5 (MODE +E)))
#       First DMA channel 0, 1 or 3.
#             8 bit DMA only
#             Logical device is not a bus master
#             DMA may execute in count by byte mode
#             DMA may not execute in count by word mode
#             DMA channel speed in compatible mode
# (DMA 0 (CHANNEL 0))
#       Logical device decodes 16 bit IO address lines
#             Minimum IO base address 0x0220
#             Maximum IO base address 0x0280
#             IO base alignment 32 bytes
#             Number of IO addresses required: 16
# (IO 0 (SIZE 16) (BASE 0x0220))
#       Logical device decodes 16 bit IO address lines
#             Minimum IO base address 0x0300
#             Maximum IO base address 0x0330
#             IO base alignment 48 bytes
#             Number of IO addresses required: 2
# (IO 1 (SIZE 2) (BASE 0x0300))
#       Logical device decodes 16 bit IO address lines
#             Minimum IO base address 0x0388
#             Maximum IO base address 0x0388
#             IO base alignment 1 bytes
#             Number of IO addresses required: 4
# (IO 2 (SIZE 4) (BASE 0x0388))

#       Start dependent functions: priority functional
#       IRQ 5, 7 or 10.
#             High true, edge sensitive interrupt (by default)
# (INT 0 (IRQ 5 (MODE +E)))
#       First DMA channel 0, 1 or 3.
#             8 bit DMA only
#             Logical device is not a bus master
#             DMA may execute in count by byte mode
#             DMA may not execute in count by word mode
#             DMA channel speed in compatible mode
# (DMA 0 (CHANNEL 0))
#       Logical device decodes 16 bit IO address lines
#             Minimum IO base address 0x0220
#             Maximum IO base address 0x0280
#             IO base alignment 32 bytes
#             Number of IO addresses required: 16
# (IO 0 (SIZE 16) (BASE 0x0220))
#       Logical device decodes 16 bit IO address lines
#             Minimum IO base address 0x0300
#             Maximum IO base address 0x0330
#             IO base alignment 48 bytes
#             Number of IO addresses required: 2
# (IO 1 (SIZE 2) (BASE 0x0300))

#       Start dependent functions: priority functional
#       IRQ 5, 7, 10 or 11.
#             High true, edge sensitive interrupt (by default)
# (INT 0 (IRQ 5 (MODE +E)))
#       First DMA channel 0, 1 or 3.
#             8 bit DMA only
#             Logical device is not a bus master
#             DMA may execute in count by byte mode
#             DMA may not execute in count by word mode
#             DMA channel speed in compatible mode
# (DMA 0 (CHANNEL 0))
#       Logical device decodes 16 bit IO address lines
#             Minimum IO base address 0x0220
#             Maximum IO base address 0x0280
#             IO base alignment 32 bytes
#             Number of IO addresses required: 16
# (IO 0 (SIZE 16) (BASE 0x0220))

#     End dependent functions
(NAME "CTL3002/154198912[0]{Audio               }")
(ACT Y)
))
#
# Logical device id CTL2011
#     Device supports vendor reserved register @ 0x38
#     Device supports vendor reserved register @ 0x3a
#     Device supports vendor reserved register @ 0x3d
#
# Edit the entries below to uncomment out the configuration required.
# Note that only the first value of any range is given, this may be changed if required
# Don't forget to uncomment the activate (ACT Y) when happy

(CONFIGURE CTL3002/154198912 (LD 1
#     Compatible device id PNP0600
#     ANSI string -->IDE<--

# Multiple choice time, choose one only !

#     Start dependent functions: priority preferred
#       IRQ 10.
#             High true, edge sensitive interrupt (by default)
(INT 0 (IRQ 10 (MODE +E)))
#       Logical device decodes 16 bit IO address lines
#             Minimum IO base address 0x0168
#             Maximum IO base address 0x0168
#             IO base alignment 1 bytes
#             Number of IO addresses required: 8
(IO 0 (SIZE 8) (BASE 0x0168))
#       Logical device decodes 16 bit IO address lines
#             Minimum IO base address 0x036e
#             Maximum IO base address 0x036e
#             IO base alignment 1 bytes
#             Number of IO addresses required: 2
(IO 1 (SIZE 2) (BASE 0x036e))

#       Start dependent functions: priority acceptable
#       IRQ 11.
#             High true, edge sensitive interrupt (by default)
# (INT 0 (IRQ 11 (MODE +E)))
#       Logical device decodes 16 bit IO address lines
#             Minimum IO base address 0x01e8
#             Maximum IO base address 0x01e8
#             IO base alignment 1 bytes
#             Number of IO addresses required: 8
# (IO 0 (SIZE 8) (BASE 0x01e8))
#       Logical device decodes 16 bit IO address lines
#             Minimum IO base address 0x03ee
#             Maximum IO base address 0x03ee
#             IO base alignment 1 bytes
#             Number of IO addresses required: 2
# (IO 1 (SIZE 2) (BASE 0x03ee))

#       Start dependent functions: priority acceptable
#       IRQ 10, 11 or 15.
#             High true, edge sensitive interrupt (by default)
# (INT 0 (IRQ 10 (MODE +E)))
#       Logical device decodes 16 bit IO address lines
#             Minimum IO base address 0x0180
#             Maximum IO base address 0x01b8
#             IO base alignment 8 bytes
#             Number of IO addresses required: 8
# (IO 0 (SIZE 8) (BASE 0x0180))
#       Logical device decodes 16 bit IO address lines
#             Minimum IO base address 0x0306
#             Maximum IO base address 0x033e
#             IO base alignment 8 bytes
#             Number of IO addresses required: 2
# (IO 1 (SIZE 2) (BASE 0x0306))

#       Start dependent functions: priority functional
#       IRQ 15.
#             High true, edge sensitive interrupt (by default)
# (INT 0 (IRQ 15 (MODE +E)))
#       Logical device decodes 16 bit IO address lines
#             Minimum IO base address 0x0170
#             Maximum IO base address 0x0170
#             IO base alignment 1 bytes
#             Number of IO addresses required: 8
# (IO 0 (SIZE 8) (BASE 0x0170))
#       Logical device decodes 16 bit IO address lines
#             Minimum IO base address 0x0376
#             Maximum IO base address 0x0376
#             IO base alignment 1 bytes
#             Number of IO addresses required: 1
# (IO 1 (SIZE 1) (BASE 0x0376))

#     End dependent functions
(NAME "CTL3002/154198912[1]{IDE                 }")
(ACT Y)
))
#
# Logical device id CTL7fff
#     Device supports vendor reserved register @ 0x39
#     Device supports vendor reserved register @ 0x3a
#     Device supports vendor reserved register @ 0x3d
#
# Edit the entries below to uncomment out the configuration required.
# Note that only the first value of any range is given, this may be changed if required
# Don't forget to uncomment the activate (ACT Y) when happy

(CONFIGURE CTL3002/154198912 (LD 2
#     ANSI string -->Reserved<--
#     Logical device decodes 16 bit IO address lines
#         Minimum IO base address 0x0304
#         Maximum IO base address 0x033c
#         IO base alignment 8 bytes
#         Number of IO addresses required: 1
(IO 0 (SIZE 1) (BASE 0x0304))
(NAME "CTL3002/154198912[2]{Reserved            }")
(ACT Y)
))
#
# Logical device id CTL7001
#     Device supports vendor reserved register @ 0x38
#     Device supports vendor reserved register @ 0x3a
#     Device supports vendor reserved register @ 0x3d
#
# Edit the entries below to uncomment out the configuration required.
# Note that only the first value of any range is given, this may be changed if required
# Don't forget to uncomment the activate (ACT Y) when happy

(CONFIGURE CTL3002/154198912 (LD 3
#     ANSI string -->Game<--
#     Logical device decodes 16 bit IO address lines
#         Minimum IO base address 0x0200
#         Maximum IO base address 0x0200
#         IO base alignment 1 bytes
#         Number of IO addresses required: 8
(IO 0 (SIZE 8) (BASE 0x0200))
(NAME "CTL3002/154198912[3]{Game                }")
(ACT Y)
))
#
# Logical device id CTL3001
#     Device supports vendor reserved register @ 0x38
#     Device supports vendor reserved register @ 0x3a
#     Device supports vendor reserved register @ 0x3d
#
# Edit the entries below to uncomment out the configuration required.
# Note that only the first value of any range is given, this may be changed if required
# Don't forget to uncomment the activate (ACT Y) when happy

(CONFIGURE CTL3002/154198912 (LD 4
#     ANSI string -->COM<--

# Multiple choice time, choose one only !

#     Start dependent functions: priority preferred
#       IRQ 3, 4, 5, 7, 10, 11 or 15.
#             High true, edge sensitive interrupt (by default)
(INT 0 (IRQ 3 (MODE +E)))
#       Logical device decodes 16 bit IO address lines
#             Minimum IO base address 0x03e8
#             Maximum IO base address 0x03e8
#             IO base alignment 1 bytes
#             Number of IO addresses required: 8
(IO 0 (SIZE 8) (BASE 0x03e8))

#       Start dependent functions: priority acceptable
#       IRQ 3, 4, 5, 7, 10, 11 or 15.
#             High true, edge sensitive interrupt (by default)
# (INT 0 (IRQ 3 (MODE +E)))
#       Logical device decodes 16 bit IO address lines
#             Minimum IO base address 0x02e8
#             Maximum IO base address 0x02e8
#             IO base alignment 1 bytes
#             Number of IO addresses required: 8
# (IO 0 (SIZE 8) (BASE 0x02e8))

#       Start dependent functions: priority acceptable
#       IRQ 3.
#             High true, edge sensitive interrupt (by default)
# (INT 0 (IRQ 3 (MODE +E)))
#       Logical device decodes 16 bit IO address lines
#             Minimum IO base address 0x02f8
#             Maximum IO base address 0x02f8
#             IO base alignment 1 bytes
#             Number of IO addresses required: 8
# (IO 0 (SIZE 8) (BASE 0x02f8))

#       Start dependent functions: priority acceptable
#       IRQ 4.
#             High true, edge sensitive interrupt (by default)
# (INT 0 (IRQ 4 (MODE +E)))
#       Logical device decodes 16 bit IO address lines
#             Minimum IO base address 0x03f8
#             Maximum IO base address 0x03f8
#             IO base alignment 1 bytes
#             Number of IO addresses required: 8
# (IO 0 (SIZE 8) (BASE 0x03f8))

#       Start dependent functions: priority functional
#       IRQ 3, 4, 5, 7, 10, 11 or 15.
#             High true, edge sensitive interrupt (by default)
# (INT 0 (IRQ 3 (MODE +E)))
#       Logical device decodes 16 bit IO address lines
#             Minimum IO base address 0x02a0
#             Maximum IO base address 0x02d8
#             IO base alignment 8 bytes
#             Number of IO addresses required: 8
# (IO 0 (SIZE 8) (BASE 0x02a0))

#     End dependent functions
(NAME "CTL3002/154198912[4]{COM                 }")
(ACT Y)
))
# End tag... Checksum 0x00 (OK)

# Returns all cards to the "Wait for Key" state
(WAITFORKEY)

É importante ler com atenção cada linha e descomentar as configurações que estejam compatíveis com os dispositivos do seu computador. As linhas parecidas com (INT 0 (IRQ 3 (MODE +E))) ou (IO 0 (SIZE 8) (BASE 0x02a0)) são as configurações possíveis. Veja que cada seção representa um recurso PNP encontrado e que há várias configurações possíveis. É necessário ter conhecimento da mais apropriada. Recomenda-se que seja a mesma do Windows. Para que a configuração tenha efeito é necessário também descomentar a linha (ACT Y). Grave,  saia do arquivo e execute novamente os comandos modeprob. Se você possuir placa de rede é recomendável que você a configure antes de configurar a placa de som. Haverá menos chance de conflito.