Simple PWM volume controller. Could it work?

[Ken Smith]

In article <3JOdndv8qvjnhXvd4p2dnA@comcast.com>,
Tam/WB2TT <t-tammaru@c0mca$t.net> wrote:
[CD4066 as PWM gain control for audio]

I have never tried this, but don't finite rise and fall times cause
distortion?

Yes but not, perhaps, as bad as you would think. The distortion happens
when the switch is partially on. The system gain in this case is less
that after the switching is finished so the distortion is deleveraged.

The CMOS switches are also non-linear with respect to any current flowing
in them and the voltage of the signal channel. To minimize these effects,
you want to not have any current flowing in the switch.
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