Author Topic: Portable spectrum analyzer for audio  (Read 1700 times)

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Offline luiHSTopic starter

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Portable spectrum analyzer for audio
« on: January 13, 2024, 04:56:59 pm »
Hello.
Can anyone recommend a portable spectrum analyzer for audio?
Everything I see seems oriented to radio signals because it reaches up to Gigahertz, and below from 100Khz or something less, and leaves out the entire audible spectrum.

I have a Hantek oscilloscope MSO5102D, which I recently discovered has a spectrum analyzer in the Math functions, but it looks very rudimentary, for example it does not have options to automatically detect harmonics and their levels, calculate THD and other sound-related functions.
 

Offline slybunda

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Re: Portable spectrum analyzer for audio
« Reply #1 on: January 13, 2024, 05:37:10 pm »
I dont have a spectrum analyzer but i use a SMD DD-1 for tuning amplifiers. Its a distortion detector
 
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Offline Roehrenonkel

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Offline Rydda

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Re: Portable spectrum analyzer for audio
« Reply #3 on: January 14, 2024, 12:28:54 am »
I use the QuantAsylum QA402/QA403 analyzer.
https://quantasylum.com/products/qa403-audio-analyzer
 
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Online 2N3055

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Re: Portable spectrum analyzer for audio
« Reply #4 on: January 14, 2024, 01:44:01 am »
Phonic Audio Analyzer (PAA3X)
NTi Minilyzer ML1

"Just hard work is not enough - it must be applied sensibly."
Dr. Richard W. Hamming
 
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Offline MarkT

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Re: Portable spectrum analyzer for audio
« Reply #5 on: January 19, 2024, 09:47:20 am »
I have a Hantek oscilloscope MSO5102D, which I recently discovered has a spectrum analyzer in the Math functions, but it looks very rudimentary, for example it does not have options to automatically detect harmonics and their levels, calculate THD and other sound-related functions.
Most DSO's are 8 bit which is nothing like enough for audio.  Even the 12 bit one's aren't going to be able to measure truly low distortion equipment.

A second-hand dynamic signal analyzer (aka FFT analyzer) is one approach, or something tailor-made for audio (Audio Precision!), or (and actually portable) something like one of the QuantAsylum audio analyzers which are pretty affordable.  I've a QA403 and its pretty handy.
 

Online cvanc

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Re: Portable spectrum analyzer for audio
« Reply #6 on: January 19, 2024, 12:45:23 pm »
If there is sufficient budget to get the Quantasylum I cannot recommend it more highly.  It's a superb bit of kit.

Plus... look at that product family, lots of really solid boxes that expand the categories the base analyzer can work in.

https://quantasylum.com/collections/frontpage
 

Offline baldurn

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Re: Portable spectrum analyzer for audio
« Reply #7 on: January 19, 2024, 03:11:16 pm »
Most DSO's are 8 bit which is nothing like enough for audio.  Even the 12 bit one's aren't going to be able to measure truly low distortion equipment.

Why not use a 24 bit 192 KHz USB soundcard and do the processing on the computer?
 

Offline luiHSTopic starter

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Re: Portable spectrum analyzer for audio
« Reply #8 on: January 20, 2024, 05:59:27 am »
Most DSO's are 8 bit which is nothing like enough for audio.  Even the 12 bit one's aren't going to be able to measure truly low distortion equipment.

Why not use a 24 bit 192 KHz USB soundcard and do the processing on the computer?

That's what I've finally decided to do, buy a Sound Blaster X3 sound card, It has a 24-bit ADC and 32-bit DAC, and as software I use the Visual Analyzer which is completely free and focused on sound.

It is a much cheaper solution than those mentioned, and with hardware that is not dependent on a manufacturer, you can use any sound card, the software does not require licenses and is completely free without limitations.
 


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