Distribution: gentoo 
kernel versions: all 2.6.x versions 
alsa driver: all 1.0.x drivers, trying kernel included sources and external sources too. 
compilation: as module or as integrated too. 
 
cat .config |grep SND 
CONFIG_SND=m 
CONFIG_SND_TIMER=m 
CONFIG_SND_PCM=m 
CONFIG_SND_RAWMIDI=m 
CONFIG_SND_SEQUENCER=m 
CONFIG_SND_SEQ_DUMMY=m 
CONFIG_SND_OSSEMUL=y 
CONFIG_SND_MIXER_OSS=m 
CONFIG_SND_PCM_OSS=m 
CONFIG_SND_SEQUENCER_OSS=y 
CONFIG_SND_RTCTIMER=m 
CONFIG_SND_ENS1370=m 
 
 
pci bus report: 
 
lspci -v 
0000:00:00.0 Host bridge: Intel Corp. 440BX/ZX/DX - 82443BX/ZX/DX Host bridge (rev 03) 
        Flags: bus master, medium devsel, latency 64 
        Memory at e0000000 (32-bit, prefetchable) 
        Capabilities: [a0] AGP version 1.0 
 
0000:00:01.0 PCI bridge: Intel Corp. 440BX/ZX/DX - 82443BX/ZX/DX AGP bridge (rev 03) 
(prog-if 00 [Normal decode]) 
        Flags: bus master, 66Mhz, medium devsel, latency 64 
        Bus: primary=00, secondary=01, subordinate=01, sec-latency=64 
        I/O behind bridge: 0000d000-0000dfff 
        Memory behind bridge: db000000-dbefffff 
        Prefetchable memory behind bridge: dbf00000-dfffffff 
        Expansion ROM at 0000d000 [disabled] [size=4K] 
 
0000:00:04.0 ISA bridge: Intel Corp. 82371AB/EB/MB PIIX4 ISA (rev 02) 
        Flags: bus master, medium devsel, latency 0 
 
0000:00:04.1 IDE interface: Intel Corp. 82371AB/EB/MB PIIX4 IDE (rev 01) (prog-if 80 
[Master]) 
        Flags: bus master, medium devsel, latency 32 
        I/O ports at b800 [size=16] 
 
0000:00:04.2 USB Controller: Intel Corp. 82371AB/EB/MB PIIX4 USB (rev 01) (prog-if 00 
[UHCI]) 
        Flags: bus master, medium devsel, latency 32, IRQ 11 
        I/O ports at b400 [size=32] 
 
0000:00:04.3 Bridge: Intel Corp. 82371AB/EB/MB PIIX4 ACPI (rev 02) 
        Flags: medium devsel, IRQ 9 
 
0000:00:0b.0 Multimedia audio controller: Ensoniq ES1370 [AudioPCI] (rev 01) 
        Subsystem: Unknown device 4942:4c4c 
        Flags: bus master, slow devsel, latency 32, IRQ 10 
        I/O ports at b000 
 
0000:01:00.0 VGA compatible controller: ATI Technologies Inc Rage 128 RF/SG AGP (prog-if 
00 [VGA]) 
        Subsystem: ATI Technologies Inc Rage Fury/Xpert 128/Xpert 2000 
        Flags: bus master, stepping, 66Mhz, medium devsel, latency 64, IRQ 11 
        Memory at dc000000 (32-bit, prefetchable) 
        I/O ports at d800 [size=256] 
        Memory at db000000 (32-bit, non-prefetchable) [size=16K] 
        Capabilities: [50] AGP version 2.0 
        Capabilities: [5c] Power Management version 1 
 
 
 
Problem Description: 
with 2.4.2x alsa drivers worked so good. 
now when i play sound, with every player, mplayer, xmms, kde stuff and so on.. 
i got a bad sound, with flicks, rumors and so on. 
 
i see that the noises are even worse when my secondary hard disk is used (ex. when playing a divs 
from that hd). disabling dma on that hark disk seems to reduce pretty to 0 the problem. 
 
i repeat i has this problem since i used 2.6.x kernel while 2.4.x worked good with a clean sound. 
Not a hardware problem cause in Windows or old kernel it still work good. 
as you can seem system reconizes my sound card as 1370. i tried 1371 module but it didn't work at 
all. 
 
so actually no solution.