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Very strange indeed, I looked at the measurements of the e-mu, which were made back in the 2000's when the device was practically new, and the measurements were absolutely identical. So with the years nothing happens, I think it depends on the conditions in which the device was used, but in this...

Very interesting, could you please be more specific, what exactly did you change in the scheme?

I think it would be more appropriate to measure switching noise of class-D amps with a good oscilloscope, but if your ADC allows you to do such measurements, then why not. I would like to take a look!

Totally agree. But the question is which is better, less noise but more harmonics or less harmonics but more noise, depends on the purpose of use.

Although it is possible that the level of harmonics will be lower in the ADC, but definitely not the noise level.

Yes, perhaps based on the datasheet data, you are right, but I can’t say the same about real solutions in devices, there are several measurements on the Internet, where e-mu 0204 was connected to a higher-class ADC, and the measurements of line output values turned out to be better than when...

Yes, of course, at higher frequencies, the noise level is higher, although I don’t quite understand why it is generally necessary to measure anything in an audio signal above 20 kHz

Sorry, but but i dont think you are right, the DAC in it is way better than its own ADC can measure. Line output has about 117dB of dynamic range while the input has 113dB. Regarding your measurement results I can say that I noticed some different interpretation of measurements using different...

Well, I want to tell you a story about E-MU 0204 and how I tamed this wild beast from early 2000s in 2023. It all started back in 2018, I was building my amplifier on TPA3255EVM and I really needed a device that I could use for measuring as well as for normal daily tasks 24/7, and for connecting...