Cosmos APU a notch+LNA $70 to outperform APx555b for $30,000

[torgeirs]

More resolution on the steps of 2k48

 

[IVX]

@IVX,

Ivan, will you be able to share the test recording and matlab script? I'd like to try and see if there is a way to make an algorithm which can run on PIC32 USB transport.

no problem, but I posted the code already, right?
Which record do you need? Music signal or something else? Actually, you can make your own test signal with Audacity, Cosmos ADC is too good and behaves like sinth signal with almost no noise. If you gonna use cheap cascaded ADCs, it would be better to refine my code accordingly.

 

[eclipsevl]

no problem, but I posted the code already, right?

yeah, as a picture 😀

Which record do you need?

One you load in your script.

Actually, you can make your own test signal with Audacity, Cosmos ADC is too good and behaves like sinth signal with almost no noise. If you gonna use cheap cascaded ADCs, it would be better to refine my code accordingly.

I have the Cosmos ADC but since there is a recording done by you, it would save me some time assembling the setup and making the recording.

 

[IVX]

https://drive.google.com/file/d/1swmW-jH56qJhCk4iFnBLahqW2LbBT1Qs/view?usp=sharing

 

[torgeirs]

Here is the stepped response of ESS39->BalUbal->ADCiso at 640 and 3k48 done again with same steps, 0,1 dB

Noise dBFS and dBr

 

[torgeirs]

Think the symetry of the odd harmonics at 3k48 single ended input are interesting