Ubuntu 9.04 not recognizing soundcard
 

I'm pretty new at linux, but I've had a few weeks' worth of experience. I have a new Toshiba Satellite A505-S6969 that I installed jaunty on. Most of it is going smoothly, except my sound is of extremely low volume. I went into the ALSA mixer through the terminal and the master is up to 100, everything is as loud as it will go and the sound is still very low.

Here is the output of lspci:
00:00.0 Host bridge: Intel Corporation Mobile 4 Series Chipset Memory Controller Hub (rev 07)
00:01.0 PCI bridge: Intel Corporation Mobile 4 Series Chipset PCI Express Graphics Port (rev 07)
00:1a.0 USB Controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #4 (rev 03)
00:1a.1 USB Controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #5 (rev 03)
00:1a.7 USB Controller: Intel Corporation 82801I (ICH9 Family) USB2 EHCI Controller #2 (rev 03)
00:1b.0 Audio device: Intel Corporation 82801I (ICH9 Family) HD Audio Controller (rev 03)
00:1c.0 PCI bridge: Intel Corporation 82801I (ICH9 Family) PCI Express Port 1 (rev 03)
00:1c.1 PCI bridge: Intel Corporation 82801I (ICH9 Family) PCI Express Port 2 (rev 03)
00:1c.3 PCI bridge: Intel Corporation 82801I (ICH9 Family) PCI Express Port 4 (rev 03)
00:1c.4 PCI bridge: Intel Corporation 82801I (ICH9 Family) PCI Express Port 5 (rev 03)
00:1d.0 USB Controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #1 (rev 03)
00:1d.1 USB Controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #2 (rev 03)
00:1d.2 USB Controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #3 (rev 03)
00:1d.3 USB Controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #6 (rev 03)
00:1d.7 USB Controller: Intel Corporation 82801I (ICH9 Family) USB2 EHCI Controller #1 (rev 03)
00:1e.0 PCI bridge: Intel Corporation 82801 Mobile PCI Bridge (rev 93)
00:1f.0 ISA bridge: Intel Corporation ICH9M LPC Interface Controller (rev 03)
00:1f.2 SATA controller: Intel Corporation ICH9M/M-E SATA AHCI Controller (rev 03)
00:1f.3 SMBus: Intel Corporation 82801I (ICH9 Family) SMBus Controller (rev 03)
01:00.0 VGA compatible controller: ATI Technologies Inc M96 [Mobility Radeon HD 4650]
01:00.1 Audio device: ATI Technologies Inc R700 Audio Device [Radeon HD 4000 Series]
02:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168B PCI Express Gigabit Ethernet controller (rev 03)
03:00.0 Network controller: Intel Corporation Wireless WiFi Link 5100
04:00.0 SD Host controller: Ricoh Co Ltd Device e822 (rev 01)
04:00.1 System peripheral: Ricoh Co Ltd Device e230 (rev 01)
04:00.2 System peripheral: Ricoh Co Ltd Device e852 (rev 01)
04:00.3 FireWire (IEEE 1394): Ricoh Co Ltd Device e832 (rev 01)

Any and all help is appreciated. And one more thing that might be of use - when I play mp3's the sound is much higher than if I try to watch a youtube video or any kind of video (if this is of any significance).

Right click on the loudspeaker icon on your top panel and choose "Open Volume Control". Check that the PCM (pulse-code modulation) slider is up on both channels (join or separate the channels by clicking on the symbol below the slider).

Sound and video applications have their own volume controls which you can adjust independently from the master volume control on the desktop.

To identify sound chips on your computer type "aplay -l" (without the quotes) in a terminal window.