- Jul 17, 2018
- Syracuse, NY USA
Here is the evidence to the contrary:I imagine most DACs are perfectly fine if they have digital volume control. Has anyone seen evidence to the contrary?
There are several ASRC chips that include an AES/SPDIF receiver but lack a digital volume control. When these ASRC chips are used in a DAC, they will precede the digital volume control and the DAC will clip intersample overs at all volume settings.
The ESS DAC chips have AES/SPDIF receivers built in, and the chip includes a digital volume control. Unfortunately the ESS chip will clip intersample overs even when the volume is turned down. Many ESS DACs will have a problem.
Given these two factors, I would expect to see plenty of DACs that have intersample clipping problems at all digital volume settings.
In many cases, you have to add additional chips to provide a digital volume control in the beginning of the signal path. The "cookbook" data sheet circuits often don't get this right. Nevertheless these cookbook circuits find their way into products.
Amir may have data on many of the DACs he has tested.