EasyRTA - real-time spectrum analyzer software - diyAudio
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Old 14th April 2014, 03:29 AM   #1
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Arrow EasyRTA - real-time spectrum analyzer software

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EasyRTA is a powerful, yet light-weight Spectrum Analyzer software for Windows XP/7/8.


EasyRTA has a number of features, including:

Click the image to open in full size. Precise measurements
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Click the image to open in full size. Automated calibration procedure
Click the image to open in full size. Ease of use


Click the image to open in full size. Recording

You can choose any input device for recording and select which channel you want (left, right or both). Microphone calibration is also supported for even more precision in measurements.

Click the image to open in full size. Spectrum analyzer

Besides being a powerful real-time spectrum analyzer, EasyRTA also features an on-screen measuring tool which can be used for measuring amplitude and frequency in any given point.

Click the image to open in full size. Sampling

EasyRTA supports sample rates from 48 kilosamples per second up to 384 kilosamples per second. Sample rate menu items are automatically populated depending on audio card capabilities. Possible options are 48 kS/s, 96 kS/s, 192 kS/s and 384 kS/s.

Click the image to open in full size. Calibration

EasyRTA has an automated calibration procedure which allows you to make very precise measurements on any device on line input or line output. Audio measurements can also be performed with an external microphone.

Click the image to open in full size. Signal generator

EasyRTA can generate various signal types, such as: Sine, Triangle, Sawtooth, Square, Impulse, White Noise and Pink Noise, with frequencies from 1 Hz up to 384 kHz (Sound card dependent) and amplitudes in four 10 dBu steps (-30, -20, -10 and 0 dBu).

Click the image to open in full size. File management

You can easily save all your measurements and review them at any time. You can either load the saved file in EasyRTA for optimized viewing or you can view the file in any supported external application, like Excel.


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Screenshots

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Free version has no time trial! Some features limited.

▼ Download the free version now ▼


Price for the full version: $25


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During your purchase, enter the coupon "diyAudio14" and get a $10 discount, for the total price of: $15

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Easy Audio Tools
www.easy-audio-tools.com

Last edited by Mister Q; 20th August 2014 at 11:07 PM.
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Old 14th April 2014, 07:43 AM   #2
AP2 is offline AP2  Italy
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Hi,
I can certainly confirm the accuracy of this software, with a good front-end it's a nice instrument.

I am available for the routin with anti-aliasing implementation in the tracking display, just for nice display or printed doc. (Independant of framework lib) as free Contribute obvious.

regards
Roberto
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Old 18th April 2014, 02:07 PM   #3
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Hi Roberto!

Thank you for your response. The majority of testing and measurement can be done with the free version of EasyRTA, which can be downloaded for free here:

http://www.easy-audio-tools.com/easyrta/
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Old 18th April 2014, 06:36 PM   #4
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Do you have any recommendations for high quality sound cards for use with this software?

Jan
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Old 19th April 2014, 01:27 PM   #5
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Hi Jan!

For basic audio measurements (room correction, loudspeaker testing, etc.), any external sound card would suffice. Or even a motherboard with an integrated sound card which has Signal to Noise ratio (SNR) 90dB or more.

For high-end users and highly dynamic measurements (that is, SNR over 120 dB), my recommendation is:

Creative Sound Blaster X-Fi Titanium HD
or
ASUS Xonar Essence STX

As for the microphones, any measuring microphone would do the job. For the microphone to be able to precisely show the measured signal levels, it is required to have calibration files for that specific microphone. In the EasyRTA software there are integrated calibration files for the following popular measuring microphones:

Behringer ECM8000
DBX RTA-M
Gold Line MK8A

Regards,
Dragan
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Old 19th April 2014, 02:52 PM   #6
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Thank you!
I do have a Behringer mic with its own cal file.
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Old 25th April 2014, 08:46 AM   #7
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Quote:
Originally Posted by Mister Q View Post
Hi Jan!

For basic audio measurements (room correction, loudspeaker testing, etc.), any external sound card would suffice. Or even a motherboard with an integrated sound card which has Signal to Noise ratio (SNR) 90dB or more.

For high-end users and highly dynamic measurements (that is, SNR over 120 dB), my recommendation is:

Creative Sound Blaster X-Fi Titanium HD
or
ASUS Xonar Essence STX

As for the microphones, any measuring microphone would do the job. For the microphone to be able to precisely show the measured signal levels, it is required to have calibration files for that specific microphone. In the EasyRTA software there are integrated calibration files for the following popular measuring microphones:

Behringer ECM8000
DBX RTA-M
Gold Line MK8A

Regards,
Dragan
Dragan,

I finally got around to look at these soundcards. They are PCI-Express cards but I would prefer a USB-type for mobility.
Do you happen to have a recommendation for a high-quality USB soundcard?

jan
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Old 25th April 2014, 09:44 AM   #8
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Hi Jan,

a nice and up to date review of USB sound cards you can find at:

12 of the best budget USB audio interfaces | In/out issues | Tech News | MusicRadar

General recommendation for high-end measurements is that sound card should have a Signal to Noise ratio close to -120dB, and the audio outputs are 0 dB (0.775V), to ensure that automatic software voltage calibration is possible.

Regards,
Dragan
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Old 25th April 2014, 09:46 AM   #9
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Hi Jan,

I'm on the same boat.
Actually trying to avoid the usual suspects, i.e. the EMU 0404 and 0402 models (which offer great specs but dodgy driver support), but I can't seem to find something that can match those specs, at least not on the same price range.
Best alternative I've come up with so far is the Focusrite Forte. Quite a bit more expensive, but it seems to be worth it and its quite compact (which is a plus) - so I'm about to bite the bullet and grab one.
Even $1000+ units don't seem to offer significantly better specs; just more I/O flexibility. Unless you are prepared to shell out serious cash for a Metric Halo LIO8 or something.
If you don't mind going with Firewire, check out the TC Electronic Impact Twin as well.
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Old 25th April 2014, 10:20 AM   #10
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Quote:
Originally Posted by Mister Q View Post
Hi Jan,

a nice and up to date review of USB sound cards you can find at:

12 of the best budget USB audio interfaces | In/out issues | Tech News | MusicRadar

General recommendation for high-end measurements is that sound card should have a Signal to Noise ratio close to -120dB, and the audio outputs are 0 dB (0.775V), to ensure that automatic software voltage calibration is possible.

Regards,
Dragan
Yes those are my specs as well, the problem is finding a USB unit that meets them!

Jan
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