Hi The lack of low frequencies on headphones might indicate that the output you are using doesn't have enough power to drive your specific headphones. Maybe the front output has a built-in headphone amplifier, and the rear one doesn't. This behavior is especially likely to occur with power-hungry headphones, but a typical line-level only output (with no headphone amplifier) will usually not have the required power, even for standard 32-ohm headphones. On Wed, Feb 20, 2008 at 12:25 PM, Wolfgang Breyha <wbreyha@xxxxxxx> wrote: > Hi! > > I got a HP dc7800 and my updated Fedora 8/ALSA 1.0.15 installation found all > hardware and sound is playing. But if I connect my headphones to the rear plug > there is nearly no bass. Even trying to use equalizers within programs doesn't > help much. > > I tried to connect the headphone to the front outlet and there I get a > reasonable signal. > > Now this PC has a builtin Speaker (which i disabled in the BIOS) and my guess > was that there is a high pass filter and the speaker shares the same output as > the rear jack. Does the AD1884 has a switchable high pass filter? Is there any > chance to support that within ALSA to turn it off? > > Some info from alsa-info.sh...(full output available at > http://pastebin.ca/909893 ) > > !!Loaded ALSA modules > !!------------------- > > snd_hda_intel > > > !!Soundcards recognised by ALSA > !!----------------------------- > > 0 [Intel ]: HDA-Intel - HDA Intel > HDA Intel at 0xf0220000 irq 16 > > > !!PCI Soundcards installed in the system > !!-------------------------------------- > > 00:1b.0 Audio device: Intel Corporation 82801I (ICH9 Family) HD Audio > Controller (rev 02) > > > !!Advanced information - PCI Vendor/Device/Susbsystem ID's > !!-------------------------------------------------------- > > 00:1b.0 0403: 8086:293e (rev 02) > Subsystem: 103c:2819 > > > !!Modprobe options (Sound related) > !!-------------------------------- > > snd-card-0: index=0 > snd-hda-intel: index=0 > > > !!Loaded sound module options > !!-------------------------- > > !!Module: snd_hda_intel > enable : N > id : <NULL> > index : 0 > model : <NULL> > position_fix : 0 > power_save : 0 > power_save_controller : Y > probe_mask : -1 > single_cmd : N > > > !!HDA-Intel Codec information > !!--------------------------- > --startcollapse-- > > Codec: Analog Devices AD1884 > Address: 0 > Vendor Id: 0x11d41884 > Subsystem Id: 0x103c2819 > Revision Id: 0x100100 > No Modem Function Group found > > Regards, Wolfgang Breyha > -- > Wolfgang Breyha <wbreyha@xxxxxxx> | http://www.blafasel.at/ > Vienna University Computer Center | Austria > > > > ------------------------------------------------------------------------- > This SF.net email is sponsored by: Microsoft > Defy all challenges. Microsoft(R) Visual Studio 2008. > http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ > _______________________________________________ > Alsa-user mailing list > Alsa-user@xxxxxxxxxxxxxxxxxxxxx > https://lists.sourceforge.net/lists/listinfo/alsa-user > ------------------------------------------------------------------------- This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ _______________________________________________ Alsa-user mailing list Alsa-user@xxxxxxxxxxxxxxxxxxxxx https://lists.sourceforge.net/lists/listinfo/alsa-user
