Toslink Noise With 828 Options

[macdrummer]

This is likely not a problem specific to the 828, but since that is what I am using, I hope to get it addressed here. I use a 2 meter toslink to connect an Alesis LX20 ADAT output to the input of my 828. Recently, I started hearing static like noises that I tracked down to that connection. At first, the extra length of the cable was coiled and uncoiling it made a significant difference in the amount of noise. However, there are still occasional (every second or two) clicks of noise. Can anyone explain the likely cause of this?

Thanks.