Would I be wasting my money to get a turntable?

What do you call the conversion of an analogue signal to a PWM/PDM or ΔΣ modulation and its subsequent filtering to recover an amplified analogue signal? Because if that’s not digital, then CD is not digital and streaming is not digital either. However, that’s exactly what happens in a class-D amp, at some point. The filtering is at the very end, but the signal conversion can happen at the amp input or just before the final (current) amplification stage.

In class D amplifier "Voltage" is converted to "Duty Cycle", both analog - meaning there is no discrete steps (unlimited resolution).  Duty cycle is back-converted to (amplified) voltage by filtering.  Streaming and CDs both have limited resolution (16 bit in CDs).

Guys we are an NAD dealer the m33,does indeed digitize an analog signal in order to use DiRAC Room Correction for all sources.

so your answer is the analog input will sound different then streaming but if you want to hear the best in analog I would trade in the m33 and go up up to the nad M66 which has a true analog Preamp as well as an improved dac.

Dave and Troy Audio intellect NJ

Nad masters  dealer

In class D amplifier "Voltage" is converted to "Duty Cycle", both analog - meaning there is no discrete steps (unlimited resolution). Duty cycle is back-converted to (amplified) voltage by filtering. Streaming and CDs both have limited resolution (16 bit in CDs).

What happens when your PWM’s oscillator signal frequency is not high enough? Who determines what frequency is "enough"? The resolution is not infinite unless the frequency is infinite (impossible). This is at least vaguely analogous to the sampling rate in digital quantization. Then you have the output filtering to smooth out artifacts from a finite frequency oscillator, and this is analogous to that phase of DA conversion.

@audiotroy the M33 accepts a digital signal, uses Dirac, then has a DAC, then an Amp.

Jerry