Conflating D and A

January 12, 2021
 by Paul McGowan

In yesterday’s post on tone controls, there were a number of comments about the use of DSP, yet few about the differences between analog and digital controls.

There is no question that if one is happy staying entirely in the digital domain, DSP EQ and correction is a near-perfect solution. We can design extensive tone controls that have zero phase shift and are sonically neutral.

The same cannot be said for analog. And therein lies the rub.

If you’re going to add tone or EQ controls to an analog preamplifier you are going to suffer added circuitry, phase shift, and sonic degradation. That’s just the cost of doing business in the analog domain.

As a manufacturer, we have to be sensitive to all our customer’s needs. We can’t, for example, produce an honest analog-based preamplifier with DSP for EQ. To do that would require the analog signal to first be converted to digital and then back into analog.

Which is why blanket statements about EQ and tone controls are difficult. We first need to set the ground rules of the playground before making blanket statements.

Just sayin’.

Subscribe to Paul's Posts

Leave a Reply

Stop by for a tour:
Mon-Fri, 8:30am-5pm MST

4865 Sterling Dr.
Boulder, CO 80301
1-800-PSAUDIO

Join the hi-fi family

Stop by for a tour:
4865 Sterling Dr.
Boulder, CO 80301

Join the hi-fi family

linkedin facebook pinterest youtube rss twitter instagram facebook-blank rss-blank linkedin-blank pinterest youtube twitter instagram