Electronics > Projects, Designs, and Technical Stuff

Analog Disovery as Audio Analyzer

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Audioguru:
The little low power Trident amplifier was designed and patented 19 years ago. They called it Class-T instead of Class-D. It cuts the highest audio frequencies.
Trident went bankrupt 9 years ago so I do not know if the ICs are new-old stock or are made recently by a Chinese copy-cat company.

jaxbird:

--- Quote from: Hero999 on December 30, 2015, 06:32:20 pm ---
.....stuff deleted by jaxbird....

Just a couple of questions.

Presumably those plots were taken from the voltage on the amplifier output, not from the sound from the speaker.

If the speaker's impedance varies at different frequencies then doesn't the power dissipation and thus output vary significantly?

If you plotted the real power dissipated in the speaker, you'll probably find it varies hugely as the frequency is changed. Does that mean the output will be distorted by the same factor?

--- End quote ---

These two measurements were taken under the exact same conditions, except one was using a precision 4 ohm resistive load and one was using the speaker shown (a PSB alpha B 2 way speaker, manufactured in Canada, you can find a comparable impedance measurement done by stereophile in NY)

jaxbird:

--- Quote from: Mark on January 03, 2016, 08:48:50 pm ---Hello,

I installed it on my laptop and could not find a RUN button, so I assumed it was a screen width issue (win7).  I installed it on my main PC and still could not find a run button (win7).  I then installed it on my win10 machine and still no RUN button...  am I doing something wrong?

--- End quote ---

Sorry. there was a problem with Win 10, it should be fixed now, please try again and let me know if you have any issues.

Thanks

jaxbird:

--- Quote from: AudioGuy on January 05, 2016, 01:21:17 pm ---This thread was recommended from another forum.  I'm excited to see where this leads...  Jaxbird, keep up the good work.

--- End quote ---

Thanks, appreciate the encouragement, new version available, enjoy.

jaxbird:

--- Quote from: Selectech on January 04, 2016, 01:20:04 pm ---Same issue here,no Run button. Tried on Win 10 x64 and Win7 x64. AD unit works fine with Waveforms on both machines.

Dave

--- End quote ---

My bad, it was some auto scaling issue, trying to comply with all these 4k screens and keep the same size, should be fixed, try update or new download.

Let me know if you still have issues.

Thanks

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