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Justin Mathews Justin Mathews is offline
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Default is PWM properly analog?

On Thursday, November 22, 2018 at 8:28:52 AM UTC-5, Justin Mathews wrote:
Firstly -- I discovered this group after looking up a thread about the "Analog Compact Disc" from 1995. Incredibly, there are participats on that thread that appear to be *still* post here.

I too have been bitten by the "better analog" bug, fascinated by Laserdiscs, CED and other potential improvements on vinyl.

I don't hate digital music at all. I work in production, mixing and mastering music and I understand its utility. But as a musician I do notice that something sometimes seems to be lost in A/D.

I'm aware Laserdiscs used some form of pulse width modulation to render analog audio. Is PWM a real continuous signal?

Is it still a fool's errand to hold out for a high resolution analog format? The vinyl resurgence could generate more interest. I know my peers are waiting.

Thanks for reading.


Hey, thanks for the answer. I don't fully understand why PWM in audio is considered analog, though. I understand that DSD (for example) uses sigma-delta modulation (a kind of PWM) at an extremely high rate -- the averages between duty cycles create a reconstruction which is indistinguishable from the input. (as seen here? https://www.analogictips.com/pulse-w...odulation-pwm/)

Based on what I'm reading about PWM, it still seems inappropriate to call it "analog." I'm not sure what I'm missing...