"Christopher Key" wrote in message

Hi,

I am using a creative Audigy 2 that connects to my AV reciever via a
homebrew toslink io connector. It has worked perfectly for 2 years,
but recently, I have started noticing glitches in the sound,
manifested as pops and clicks in PCM content, and squeaks in AC3
content, as well as poor detection of AC3 content on my reciever.

I am keen to try to diagnose the source of these problems, and would
like to try some loopback tests. The kX audio drivers that I am
using allow me to record audio from a digital input without any
processing, so I was hoping to be able to record the bit error rate
for differing optical cables, processor loads and running
applications. Is anyone aware of any free, or trial version software
that will allow me to perform these tests?

For performing conventional audio technical tests of soundcards, little
beats the freeware "Audio Rightmark" program.