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In the Forum: Audio Discussions
In the Thread: Crossover Design
Post Subject: Digital can’t attenuate, analog can’t delay.Posted by Romy the Cat on: 1/5/2012
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 Markus wrote: |
| Do you have a link to an explanation of this statement? Given the proliferation of digital volume controls, I'd like to understand more. |
|
The proliferation of digital volume controls is not an evidence of anything. Digital volume controls used only in economical equipment, including the high-end cheap equipment. Any more or less serious audio component does use analog volume attenuation, even though digitally controlled.
I will not explain why digital volume controls are problematic; I did it many times already. I can’t not refer to other sites as well as I for quite number of years do not pay attention to what people right about the subject at other sites.
In very brief. Digital reducing volume by tossing away bits. At 0dB you have one resolution, at -6dB you have another and at -30 db you end up with a few bit resolution of a telephone line. At DSP level the only way to reduce value is throwing away bits. It is why digital can’t not filter. Digital can only delay with absolute no negative consequences. With analog is opposite – attenuation is not a problem but delay is major pain in ass - topologically imposable to do it perfect.
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