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

--- Quote from: ci11 on March 27, 2016, 02:34:16 pm ---Hi,

I can't get the download to work - got a 'Fatal Error - Unable to find "dwf.dll"'. What am I doing wrong? My PC in Win 7 x64, .Net 4.6.

Thanks.

--- End quote ---
Had the same problem. I've reported it to jaxbird but he seems to be away

In the interim this work around got me going
Download and install the old version of waveforms from here http://store.digilentinc.com/waveforms-download-only/
Select "downgrade" for all the options

This should be enough to get his program working.
If you want/need the new Waveforms2015 version as well as his software then continue with the following

With the old version now installed go to C:\windows\SysWOW64 and copy dwf.dll from this directory
Then go to C:\Users\<your user name>\AppData\Local\Apps\2.0\MZKGDAT1.PHM\N5YL8OR9.1AQ\audi..tion_0000000000000000_0001.0000_e5f4f61c851d23cd directory
At a guess some of those alphanumeric directories may be different in you installation. You need to find the folder containing these files-
Audio-Frequency-Icon.ico
AudioAnalyzerSuite.cdf-ms
AudioAnalyzerSuite.exe
AudioAnalyzerSuite.exe.cdf-ms
AudioAnalyzerSuite.exe.config
AudioAnalyzerSuite.exe.manifest
AudioAnalyzerSuite.manifest

Paste the copied dwf.dll here

You can now re-install the new version of waveforms(2015) and AudioAnalyzerSuite will use the DLL in its local directory first. allowing you to use his software and the new version of waveforms

Carrington:
Because of his daily work, we can not expect quick answers from 'jaxbird'. Additionally, he is providing all these software for free. So, in my opinion, we can not demand a full attention.

Please, don't misinterpret my words, I'm not reproaching nothing. I also bothered him before with a lot of emails. I repeat, I'm not criticizing, just letting you know about, specially to prevent than anyone get nervous while are waiting for an answer.

Cheers.
jaxbird:

--- Quote from: ci11 on March 27, 2016, 02:34:16 pm ---Hi,

I can't get the download to work - got a 'Fatal Error - Unable to find "dwf.dll"'. What am I doing wrong? My PC in Win 7 x64, .Net 4.6.

Thanks.

--- End quote ---

It seems like it was caused by the updated to Waveforms software, I have added a fix, please try again and let me know if it works now.

Thanks
jaxbird:

--- Quote from: halej1 on March 25, 2016, 01:07:07 pm ---Jaxbird - still awesome! and thank you for the input to my question. Your software/hardware solution looks really good!  I watched your video and was wondering --- you are able to look at the graphs and pretty easily tell if things are good or not so good. Obviously pretty simple on something like THD or THD+N but can you share or direct me to where I can find out, for example -- what is acceptable output impedance (tube, solid state) or input impedance (tube, Solid state) etc...  I guess what I'm asking is lot's of people can probably set the system up and get graph but the skill comes with the interpretation.

It may be a little while before I spring for an Analog Discovery and your software -- cause I just blew my budget on an Oscilloscope (Rhode and Schwarz 1202) -- Yeah a bit overkill for this type of analysis but I wanted to treat myself (the FFT function is supposed to be very good, though)

Cheers
John

--- End quote ---

Thanks, transistor based amplifiers should have very low output impedance, as in way below 1 ohm, more like 10s or 100s of milli ohm. Tube amplifiers cannot achieve that performance because they have output transformers (well some obscure transformer less tube amps do have lower output impedance, but they require insane amounts of paralleled output tubes and are more a novelty)

This solution using the Analog Discovery is not something you would use measure marketing specs, but it's something useful to anyone trying to diagnose a potential faulty amplifier, or making sure your amplifier design performs pretty well.

It is far superior to purely sound card based solutions in that it's got differential inputs and bandwidth beyond 10MHz, so if anything is oscillating, you will notice right away.

jaxbird:

--- Quote from: Carrington on March 29, 2016, 02:01:31 pm ---Because of his daily work, we can not expect quick answers from 'jaxbird'. Additionally, he is providing all these software for free. So, in my opinion, we can not demand a full attention.

Please, don't misinterpret my words, I'm not reproaching nothing. I also bothered him before with a lot of emails. I repeat, I'm not criticizing, just letting you know about, specially to prevent than anyone get nervous while are waiting for an answer.

Cheers.

--- End quote ---

Thanks, much appreciated Carrington, you are absolutely right, this is a hobby project, I cannot provide quick response to issues, it's simply not possible, but if you provide good bug reports, I will do my best to get them fixed when I have available time.

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