drmatt wrote: > I was assuming the volume was operated similar to Squeezebox, i.e. by > modifying the input stream to the DAC and using its output as-is. Is > that not what you're referring to here? I believe that's how the > transporter works. >
That is what I am referring to. There are two separate noise mechanisms at work here. On one hand you have the noise floor of the analog buffer and output stages (that will be just the same independent of whether the volume control is digital or analog, so that is why I wasn't discussing that part, and on the other hand quantization noise that is dependent on the resolution/bit depth of the DAC. The effect of the volume control on that depends on the number of bits used internally to calculate the scaling (normally 32 or more bits), and number of bits in the output stage once you get down to levels when that starts to matter (as I wrote, about 10 bits attenuation with a 24-bit output stage). "To try to judge the real from the false will always be hard. In this fast-growing art of 'high fidelity' the quackery will bear a solid gilt edge that will fool many people" - Paul W Klipsch, 1953 ------------------------------------------------------------------------ Julf's Profile: http://forums.slimdevices.com/member.php?userid=42050 View this thread: http://forums.slimdevices.com/showthread.php?t=106519 _______________________________________________ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/mailman/listinfo/audiophiles
