Comment 8 for bug 321028

Pity to hear about your problem 'cause avidemux is great.
Here, sound works great with all audio outputs except OSS (no init) and SDL.
SDL failure is similar to yours except that drop is hiss and clock is 1 second.
Not all the way through, though, there are nice passages.
avidemux and system audio are out of the box (no other setting change).
Hardware is Intel too :
>lshw
...
        *-multimedia
             description: Audio device
             product: 82801H (ICH8 Family) HD Audio Controller
             vendor: Intel Corporation
             physical id: 1b
             bus info: pci@0000:00:1b.0
             version: 03
             width: 64 bits
             clock: 33MHz
             capabilities: bus_master cap_list
             configuration: driver=HDA Intel latency=0 module=snd_hda_intel