LinuxQuestions.org - regarding sound problem

hi all
how to share the sound for two applications.
actually we are developing a freesoftphone for that i need to share the sound for
phone and for tv.
at present we are doing , if i receive a call i have to close the tv of my software and have to answer the call.
but i dont want like this.. i wanna do both at a time.. i ve to play tv and ve to receive call also.. for this i hav eto share the sound..
how can do this..

i dont know what the sound drivers am using now?
can you tell me how to know my sound drivers.
i tried this command but i dont know whether it is correct or wright.

Code:

[root@localhost ~]# lspci

00:00.0 Host bridge: ATI Technologies Inc RS480 Host Bridge (rev 10)

00:02.0 PCI bridge: ATI Technologies Inc RS480 PCI-X Root Port

00:13.0 USB Controller: ATI Technologies Inc IXP SB400 USB Host Controller

00:13.1 USB Controller: ATI Technologies Inc IXP SB400 USB Host Controller

00:13.2 USB Controller: ATI Technologies Inc IXP SB400 USB2 Host Controller

00:14.0 SMBus: ATI Technologies Inc IXP SB400 SMBus Controller (rev 11)

00:14.1 IDE interface: ATI Technologies Inc Standard Dual Channel PCI IDE Controller ATI

00:14.3 ISA bridge: ATI Technologies Inc IXP SB400 PCI-ISA Bridge

00:14.4 PCI bridge: ATI Technologies Inc IXP SB400 PCI-PCI Bridge

00:14.5 Multimedia audio controller: ATI Technologies Inc IXP SB400 AC'97 Audio Controller (rev 02)

00:18.0 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] HyperTransport Technology Configuration

00:18.1 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] Address Map

00:18.2 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] DRAM Controller

00:18.3 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] Miscellaneous Control

01:00.0 VGA compatible controller: nVidia Corporation Unknown device 0162 (rev a1)

02:03.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL-8139/8139C/8139C+ (rev 10)

02:04.0 FireWire (IEEE 1394): VIA Technologies, Inc. IEEE 1394 Host Controller (rev 80)

[root@localhost ~]#

please help me

thank you inadvance