Apogee Element 24 thunderbolt interface: quick measurements

[JohnYang1997]

Sure!

IMD 20/1000Hz (60Hz is the third harmonic, not mains frequency):

View attachment 26146

And NID pink noise , 20-10kHz:
View attachment 26147

Wow. Even though it still showed some issues. That's incredibly clean for ess. Props to apogee.

Oh, I forgot to ask for 4:1 for the 20+10k test. Would you please test again with 4:1 amplitude? Sorry.

 

[pkane]

Wow. Even though it still showed some issues. That's incredibly clean for ess. Props to apogee.

Oh, I forgot to ask for 4:1 for the 20+10k test. Would you please test again with 4:1 amplitude? Sorry.

Out of curiosity, what does the 4:1 test tell you that the 1:1 one doesn't?

Here's the 20 + 1kHz 4:1 IMD:

And for good measure, here's 20 + 10kHz 4:1 IMD:

 

[JohnYang1997]

Out of curiosity, what does 4:1 test tell you that the 1:1 one doesn't?

Here's the 20 + 1kHz 4:1 IMD:
View attachment 26157

And for good measure, here's 20 + 10kHz 4:1 IMD:
View attachment 26158

Because it triggers some weird modulation issue of ess more. Idk why.
In this case it's fucking clean. Impressive.

 

[pkane]

Some additional measurements of Element24 using stepped sine sweeps in REW.

Distortion vs Frequency (sampling rate 96KHz):

Distortion vs Level shows the THD+N is dominated by noise (the second line from the top, gray):

 

[barrows]

Hey Paul, thanks for this. I have been looking for an A/D interface for doing some simple, purist style, live stereo recording, and stumbled across the Element 24. Looks like this is perfect for the task by just adding a decent pair of mikes. Makes sense that Apogee spent the money on the electronics rather than controls.

 

[pkane]

Hey Paul, thanks for this. I have been looking for an A/D interface for doing some simple, purist style, live stereo recording, and stumbled across the Element 24. Looks like this is perfect for the task by just adding a decent pair of mikes. Makes sense that Apogee spent the money on the electronics rather than controls.

Just remember that you do need a Mac to drive Element, it will not work without one.

 

[barrows]

Yup, MacBook Pro with a Thunderbolt port here.

 

[pkane]

Yup, MacBook Pro with a Thunderbolt port here.

Exactly how I'm using it.

 

[elvisizer]

Impressive.

that's apogee!

 

[pkane]

A bit late, but here's the Apogee Element ADC part of the interface measured with RME ADI-2 pro FS converting test signal to analog. Both were working at 192kHz sampling rate:

And, for good "measure" , here's the DAC in Element24 being measured by ADI2-pro FS ADC:

 

[pkane]

Apogee Element24 DAC peak-hold scan of a 5Hz-22.05kHz sine sweep @44.1kHz captured by ADI-2 Pro FS @192kHz: