rackmonkey

Re: Digilent Analog Discovery 2
« Reply #20 on: August 26, 2019, 10:42:32 PM »
I found the freeware add-on not-so-useful. I think the project predated the AD2 and was written to address some shortcomings in the original AD software.  First, all of the functionality in the add-on is already there in the newer Waveforms software. More importantly, the tools in the add-on are less functional than what’s in the current Waveforms suite. Lack of flexibility - such as the inability to change window types (e.g., Blackman-Harris, Rectangular, Hanning, etc) and the lack of a smoothing function (which makes it impossible to actually see not-so-subtle differences between test results) - really hamper the tool and make it far less useful than REW or any software tools we commonly use.

In short, don’t bother.

That said, the AD2 itself is a great little tool, as is the newest Waveforms software. The bandwidth alone makes it worth having alongside  a soundcard+REW type setup. You can see things no average soundcard will see, such as high frequency ringing when evaluating zobel network part values. But I still would ‘t want it as my only testing tool. I find myself still going to REW for a lot of common tests.

Best features of AD2/Waveforms for audio testing:

- Add on impedance analyzer breakout board from Digilent. Quick and easy input/output impedance tests
- Curve tracer add-on board from Knack Supply is convenient for what it does
- Bandwidth far beyond soundcard capabilities
- Breadboard adapter addon board is handy for obvious reasons
- Logging/scripting capabilities
- Logic analyzer for digital work
- Of course, having a scope, FFT, two channel function generator and curve tracer (and more) windows to tile or toggle between for tests is great. Can’t do that with a soundcard + audio test sw.

Biggest knocks on AD2+Waveforms SW are that you don’t have the number of window functions you get with audio test sw (just Hanning and Blackman if I recall, correctly, but don’t quote me on that. Might have been BH and rectangular), and there’s no smoothing function. {EDIT: To be clear, I’m talking about the Digilent Waveforms software that comes with the AD2 here, not the freeware add-on I talk about above. It DOES support changing window functions (unlike the freeware) but the choices of window type are more limited than audio testing SW.} Because of the lack of smoothing, you just have to up the averaging to smooth out the graph lines, which takes a lot longer than hitting a smoothing command. Waveforms is miles better than the freeware add-on I talked about up top, but it still doesn’t have smoothing, at least as far as I can tell. And lacks the nice little conveniences for audio testing like a quick and easy THD+noise overlay window.

Edit 2: Bottom line:  IMO, AD2 is a great little scope and test suite that covers a lot of bases, but you’ll probably not fully replace your soundcard + audio test SW with it. If you don’t own a scope and/or function generator, it’s definitely worth a look. Even if you do own those tools, the SW and peripherals make it a very useful addition to consider for your kit. As a whole, it makes performing many types of tests a whole lot quicker and more convenient than if you had to set them up with traditional tools.
 
Hope this is helpful.
« Last Edit: August 27, 2019, 09:32:06 AM by rackmonkey »
Whether you think you can or you think you can't, you're probably right.


gyraf

Re: Digilent Analog Discovery 2
« Reply #21 on: August 27, 2019, 02:52:28 AM »
..thanks for the update, still following from sideline..
..note to self: don't let Harman run your company..

Re: Digilent Analog Discovery 2
« Reply #22 on: August 27, 2019, 08:52:00 AM »
thanks for the update.

12afael

Re: Digilent Analog Discovery 2
« Reply #23 on: August 28, 2019, 03:29:36 AM »
AD2 and REW is a great combo. Other piece of software that is very useful is izotope RX 7
heavy metal is the law!!!

Re: Digilent Analog Discovery 2
« Reply #24 on: September 30, 2019, 05:12:49 PM »
AD2 and REW is a great combo. Other piece of software that is very useful is izotope RX 7

You can use REW and the AD2 together?

rackmonkey

Re: Digilent Analog Discovery 2
« Reply #25 on: September 30, 2019, 07:26:31 PM »
I think he means that AD2 and REW are a good compliment to each other, rather than that they can be used together. They aren’t interactive (at least in my experience). I know of no way to make REW “see” the AD2 as the soundcard it uses.

But I agree that they are two useful tools that together give you a lot of test/measurement functions.
Whether you think you can or you think you can't, you're probably right.

Gold

Re: Digilent Analog Discovery 2
« Reply #26 on: July 03, 2020, 06:12:32 PM »
I just downloaded the Waveforms software to take a look. It installed without incident on a MacBook Air running 10.12.6
I have a Presonus Audiobox USB96. USB 2.0 compliant. It came up in devices without any prodding. It generally seems to be working but needs to be calibrated. I'm going to play with the software for a little while before buying the AD2 hardware.

The main issue people have seems to be the AD2 hardware being 14bit. There were choices to operate the Presonus in 16 bit or 32 bit mode at either 48K or 96K. Hopefully I will be able to get accurate low level measurements.

abbey road d enfer

Re: Digilent Analog Discovery 2
« Reply #27 on: July 03, 2020, 06:31:15 PM »
Paul, I tried to answer your PM but your  inbox is full.
Who's right or wrong is irrelevant. What matters is what's right or wrong.
Star ground is for electricians.

Gold

Re: Digilent Analog Discovery 2
« Reply #28 on: July 03, 2020, 06:56:34 PM »
I just cleared out some space in my PM.

fazer

Re: Digilent Analog Discovery 2
« Reply #29 on: July 08, 2020, 02:32:16 PM »
AD2 is sold out and will see a price increase due to component cost increase.   It looks like a cool piece of kit.  gonna be a while before its even available to try for me.