Delta-sigma vs “Multibit”: what’s the big deal?

[DonH56]

I saw that the dac can render muli level tones keeping very low thd. I wasn't sure of this seeing the other tests before. Yet i'm not sure of the precision of the level and how much it matters.

The DS design has greater resolution and lower distortion thus its levels are more precise than R2R DACs.

 

[Bluespower]

So we close the thread? No doubts anymore for all?

 

[solderdude]

I saw that the dac can render muli level tones keeping very low thd. I wasn't sure of this seeing the other tests before. Yet i'm not sure of the precision of the level and how much it matters.

The precision of the DAC in question has been documented and exceeds that of any known (to me) R2R

edit: DonH56 beat me to it.

 

[solderdude]

So we close the thread? No doubts anymore for all?

Or we keep it for prosperity and folks having other comments in the future or wishing to debate or dig in deeper.

 

[Bluespower]

The precision of the DAC in question has been documented and exceeds that of any known (to me) R2R

Which dac is it?

 

[solderdude]

I suspect Alan's DAC1 but I may be wrong about that as well.

Have a look at the linearity plots made by Amir of R2R and DS DAC's.

 

[JJB70]

Delta what now?

 

[Bluespower]

Delta waves are more trippy and theta more conscientioussness.

 

[Blumlein 88]

I'm posting from a phone or I'd find it. If you'll look at some tests I've posted on low level linearity, you'll see sigma Delta DAC s are practically perfect down to 22 bits. Probably lower but it's hard to measure that low. I don't think any multi bit dacs come close.

The signal I use has 1 bit positive, a zero and 1 bit negative with a zero. The values are such that only one bit level is on at anytime and no others.

Does that make sense?

 

[Bluespower]

Is it for all frequencies? @Blumlein 88

 

[RayDunzl]

Is it for all frequencies?

Lower frequency will cause more bits (samples) to be used (populatd) per cycle.

The signal I use has 1 bit positive, a zero and 1 bit negative with a zero.

This signal frequency would be at an integer ratio to the sample rate, I'm thinking 1/4 (but I get to be wrong).

 

[vitalii427]

This thread was like exorcism!

 

[Bluespower]

Do you think it would be revelant to test how much bit precision at 16 khz we can get from 44.khz 16 bit sample?

 

[Blumlein 88]

Lower frequency will cause more bits (samples) to be used (populatd) per cycle.



This signal frequency would be at an integer ratio to the sample rate, I'm thinking 1/4 (but I get to be wrong).

Yes 1/4 of sample rate.

 

[Bluespower]

I think it s very good it means 22 bit at 10khz.

 

[Blumlein 88]

Do you think it would be revelant to test how much bit precision at 16 khz we can get from 44.khz 16 bit sample?

I've done the test at several rates including 44.1 khz.

 

[Blumlein 88]

I think it s very good it means 22 bit at 10khz.

11025 hz for 44.1 rates and 12000 for 48 rates.

 

[Blumlein 88]

Is it for all frequencies? @Blumlein 88

There's good reason to think it applies to all frequencies. It would be possible to test. For me it would be very, very tedious. Multi bits can't equal this at any frequencies.

 

[RayDunzl]

Do you think it would be revelant to test how much bit precision at 16 khz we can get from 44.khz 16 bit sample?

You can get more than 16bit precision from dithered 16bit input (I think, somebody else chime in please).

 

[Thomas savage]

Delta what now?

Delta whiskey bravo goodnight.