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Old 4th January 2012, 12:18 AM   #1
benc is offline benc  United Kingdom
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Default New Audio Analyser

I've been studying the market for a sub $1000 audio analyzer (in the vein of APX515/dSCOPE style) and would like to gauge the level of interest and ask a couple of basic questions.

Q1. Do you need, would you like and would you pay extra from digital audio inputs/outputs (XLR/BNC/optical)?

Q2. If you had digital options, would you use logic level signals as well (MCLK/BCK/DATA/1.8v/2.5v/3v3 type stuff)?

Q3. What type of OS do you use (XP/Vista/7/MacOS, etc..), if your a Mac user, do you still have a PC running at least XP?

thanks,
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Old 4th January 2012, 02:57 PM   #2
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Sounds like an interesting project .

1. Yes, XLR or BNC.
2. Nice to have but don't have a current use.
3. XP, Win 7 and Ubuntu
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Old 4th January 2012, 03:30 PM   #3
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You do not tell what you want to measure in audio.

I use a calibrated Behringer ECM8000 and an E-MU 0204 USB audio interface. My OS is XP and I run the Visual Analyzer and the free version of TrueRTA. I am thinking of upgrading to level 4 of the TrueRTA program.
I would love to have optical and S/PDIF, but that needs to wait.
So far, less than $250, not counting the aceessories. E
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Old 4th January 2012, 08:40 PM   #4
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I bought a dScope 2 weeks ago.. It works fine with MAC OS and Parallels... Let me know if you manage to build the same <> 1000 USD :-)

BR, Thomas
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Old 4th January 2012, 10:04 PM   #5
benc is offline benc  United Kingdom
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Quote:
Originally Posted by brycheiniog View Post
Sounds like an interesting project .

1. Yes, XLR or BNC.
2. Nice to have but don't have a current use.
3. XP, Win 7 and Ubuntu
Thanks for responding.

It's been an interesting project, born out of necessity.
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Old 4th January 2012, 10:18 PM   #6
benc is offline benc  United Kingdom
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Join Date: Apr 2010
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Quote:
Originally Posted by mickeymoose View Post
You do not tell what you want to measure in audio.

I use a calibrated Behringer ECM8000 and an E-MU 0204 USB audio interface. My OS is XP and I run the Visual Analyzer and the free version of TrueRTA. I am thinking of upgrading to level 4 of the TrueRTA program.
I would love to have optical and S/PDIF, but that needs to wait.
So far, less than $250, not counting the aceessories. E
Thanks for the response.

I built the prototypes as I needed an AP, but couldn't afford a new one and second-hand units are still pricey.

I considered using audio-interfaces, but they aren't designed with relay driven attenuators, high power buffers, low jitter clocks, low-noise amps, top-notch converters and they tend not to be flat if you go high-speed.

My unit would be a little expensive (even at $1000) if you are just using it as an interface to a mike for such things as speaker measurement.

I built the digital features into prototypes, but they would add to the cost of the base unit if included - so weighting the options (so to speak).
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Old 4th January 2012, 10:22 PM   #7
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What software are you using with it?
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Old 4th January 2012, 10:47 PM   #8
benc is offline benc  United Kingdom
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I've written (from scratch) my own Windows front end. It's in the AP2700/dSCOPE3 style rather than APX, with the ability to launch different instruments, graphs, plots etc...

And is currently written on the oldest PC I own (a Toshiba 2007 XP laptop), but works on Vista & 7
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Old 4th January 2012, 10:56 PM   #9
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What is the current functionality? Any chance of some screenshots?
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Old 4th January 2012, 11:23 PM   #10
benc is offline benc  United Kingdom
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Quote:
Originally Posted by brycheiniog View Post
What is the current functionality? Any chance of some screenshots?
I'm tidying up the PC front-end (nice things like designing buttons, making the graphing look a prettier and working on some of the export data functions), I've also got some small hardware design issues to sort out.

Functionality - lots, most of the stuff you get with APX515/DSCOPE3 (except the higher end DSCOPE3 digital functions like jitter/eyepatterns), no FFT function in the v1 software.
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