Electronics > Projects, Designs, and Technical Stuff
Analog Disovery as Audio Analyzer
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jaxbird:

--- Quote from: mtdoc on December 10, 2015, 06:54:22 pm ---Very cool. Any chance you'll be releasing your "Audio Analyzer Suite"?

I just recently upgraded to the Waveforms 2015 software (now available for Linux, MacOS and ARM!) .  I like the changes they've made.  Your applications seems like a very useful addition. :-+

--- End quote ---

Sure, as soon as I am somewhat happy with it :). This is just a very early version. I do want to add a small plug in PCB design. The Discovery unit max input is +/- 25V, that is a bit limited for testing larger amplifiers, so adding a small board with a programmable divider is needed. Plus perhaps some phono jacks or just screw terminals and perhaps some added protection to make sure the unit is never damaged.

I haven't tried the Waveforms 2015, my current version is 2.7.5 and it's got some bugs, not so obvious ones, but I've noticed it doesn't always display the spectrums correctly depending on settings.

My goal is to make it really easy to do audio measurements.
miguelvp:
Nice, Also I'm going to upgrade to Waveforms 2015 since I saw the new Analog Digital Discovery 2 and had a link to the updated software, but have not had a chance.
Fungus:

--- Quote from: c4757p on December 10, 2015, 05:56:40 pm ---I second this. It's pretty hard to bring up any discussion of audio quality and design without the "everything is bullshit" brigade coming out. It's a cheap and easy way for people with a limited knowledge of engineering to look smart to their peers.

--- End quote ---

OK, I'm here now. What audio bullshit are we discussing today? My $100 system sounds fine to me.

moffy:
Really nice plots and board. Have you tried THD+N vs frequency for your D Class amp yet? That would be interesting. Also even though it is 14 bits can't you oversample to increase your resolution?
rjeberhardt:
Can you do intermodulation distortion with that kit?  I've often thought that intermodulation is more significant than THD especially when you see how THD rises at higher frequencies.  Music is almost never just a single tone.

Russell.
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