That sounds rather odd. One simple test is to swap the Toshiba and HK's digital inputs at the 950 (assuming both are coaxial, as that's the digital output I've had on my HK CD changer and Toshiba DVD player) and see if the problem still happens. If it still happens to the HK, then the problem is in either the interconnect (unlikely) or the CD player.

Digital vs analog inputs: when using a digital input to the 950, the source is passing the original audio signal (CD, DVD, satellite, digital cable, whatever) unaltered from source media to the 950. The 950 then does whatever is needed to the digital signal and converts it to analog before outputting it to the pre-amp outs. When using an analog input, the source is converting the audio from digital to analog (if applicable -- obviously not the case for a VCR, tape deck, turntable, ...) and the 950 receives that analog signal. That analog signal is converted back to digital for processing (bass management, surround modes such as Pro Logic II) before being converted back to analog and passed on to the 950's output. (On the way out, a few things happen in every case -- delays for the different channels, some tone control if you have adjusted treble and bass, and of course volume control.) If you are using an analog input and enable the "stereo bypass" mode, the 950 routes the signal past the analog-to-digital conversion and all of the digital processing.

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