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True RTA analyzer software
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Old 15th October 2016, 05:52 PM   #1
JAY X is offline JAY X  Spain
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Default True RTA analyzer software

Hi All!

I'm looking for a analyzer software to test the noise/THD/bandwidth of the summing mixer i have designed. I found a software: True RTA,
https://www.trueaudio.com/rta_abt1.htm that seems good for this purpose.
I have a quite good audio interface: UMC-1820. bought recently.

ˇAny comment about this software is wellcome!

ˇThank you very much!

jay x
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Old 15th October 2016, 06:06 PM   #2
Frex is offline Frex  France
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Here, we could highly recommend you Arta because
it's a very good software and it's free. Many DIYers on the forum use it with success.

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Old 15th October 2016, 06:13 PM   #3
biju55 is online now biju55  India
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Are there any special circuit between the sound source and PC sound card while measuring the distortion with these software ?.
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Old 16th October 2016, 07:34 AM   #4
Frex is offline Frex  France
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You only must be careful to not overload the input.
If you want to measure the THD from an output of amplifier, you will
need to add a resistor divider (attenuator) to have a signal level at
input of sound card of about 1-2V max.
You must also be careful that some amplifier with BTL output can't
be connected directly because each output wire are active (no ground).

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Old 18th October 2016, 02:53 AM   #5
Pano is offline Pano  United States
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True RTA analyzer software
Yes, Frex is correct. Use ARTA. The free version does no allow yo to save files, but it's still very useful. You could also try REW (Room EQ Wizard). Not quite as well adapted to what you want to do, but free.
Take the Speaker Voltage Test!
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Old 18th October 2016, 02:29 PM   #6
skidave is offline skidave  United States
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Go download the April 2016 issue of AudioXpress and there is an article all about measurement of this nature.
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