I'm trying to hook some headphones up to my 950, but I must be doing something wrong.

I've connected the headphone amp up to the tape out. This works just fine when I use an analog input, but when I switch to a digital input like my dvd player or Xbox, it doesn't look like the d-to-a conversion makes it to the tape out.

I am doing something wrong? Is my 950 broken?

Any help much appreciated.