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RE: USB isolation hub (Gordon, audioengr, John - input wanted)

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The inductor may help in your situation, but it really does not provide isolation, only attenuation of high-frequencies. Listening tests required. As for the hub "reclocking", it is certainly possible, but doubtful. It is more likely that it buffers and clocks the data through a flip-flop. This is a far-cry from useful reclocking. The jitter will still be there and get worse.

Isolation can be achieved using an RF or inductive coupling device. These are active devices. One could also use a pulse transformer, but the USB interface may need DC to operate properly. These will break the ground connection between the computer and the audio system - galvanic isolation.

I chose to isolate further down the chain, in the I2S interface or the S/PDIF output interface.

Steve N.

Edits: 02/22/08

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