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More => Old Versions => Media Center 17 => Topic started by: fegelmej on December 12, 2011, 05:12:59 pm

Title: DSP Analyzer - loss the waveform!
Post by: fegelmej on December 12, 2011, 05:12:59 pm

Can somebody offer me a little insight into the ANALYZER window in the DSP plugin?  There are two boxes in the lower corners of the visualizer.  Like a fool I messed with them, and now I have no visual image.  What do those boxes represent, and how can I bring back the visual feature?

Thanks.

Title: Re: DSP Analyzer - loss the waveform!
Post by: Matt on December 12, 2011, 05:27:27 pm

They're the frequencies to analyze.

Try these two values:
20
20K

Title: Re: DSP Analyzer - loss the waveform!
Post by: fegelmej on December 12, 2011, 05:35:20 pm

Ah, yes, I just didn't think to add the "k" 

Thanks, Matt

Title: Re: DSP Analyzer - loss the waveform!
Post by: rumos on December 31, 2011, 12:39:26 pm

Hi there,

i have a question concerning the DSP Analyser too. Why is the analyser showing no constant frequency response when white noise is played?
What is the y-axis of the plot?

Thanks in advance :)

Title: Re: DSP Analyzer - loss the waveform!
Post by: Matt on December 31, 2011, 01:40:58 pm

Quote from: rumos on December 31, 2011, 12:39:26 pm

Hi there,

i have a question concerning the DSP Analyser too. Why is the analyser showing no constant frequency response when white noise is played?
What is the y-axis of the plot?

Thanks in advance :)

The y-axis is energy.  The x-axis is frequency using a logarithmic scale, just like human hearing.

Pink noise will be a flat line and white noise will show an upward slope.

Title: Re: DSP Analyzer - loss the waveform!
Post by: Gandali on December 31, 2011, 02:01:08 pm

Help!
can I expand the amplitude in the spectrum analyser? that's the vertical scale
 I can change the horizontal scale OK but there isn't a facility to change the vertical scale??

Title: Re: DSP Analyzer - loss the waveform!
Post by: rumos on December 31, 2011, 03:19:18 pm

Hello Matt,

thank you very much for your answer  :) The y-axis is linear I assume.
When I look up the spectra in wiki, white noise should be a constant line along the whole logarithmic frequency axis.
Pink noise a downward slope. Or did I misunderstood something?
 
http://en.wikipedia.org/wiki/Colors_of_noise (http://en.wikipedia.org/wiki/Colors_of_noise)

In the meantime I did some research :) your y-axis is logarithmic too and adopted to the human hearing?
Then it's clear, that white noise is showing a upward slope. Could you add a label to the y-axis? Or like Gandali requested
the possibility of changing the scale?

PS: What's the meaning of the three different colored lines?

Title: Re: DSP Analyzer - loss the waveform!
Post by: Matt on January 02, 2012, 01:29:11 pm

Each line on the y-axis is 3dB.

The different colored lines are the different channels (and one line is the sum of all channels).

Adding better labels is on our List of Good Intentions.

Title: Re: DSP Analyzer - loss the waveform!
Post by: rumos on January 03, 2012, 06:55:23 am

Hi Matt,

thank you for your answer and amazing support!
So I will be patiently waiting for an update and in the meantime enjoying
your fine piece of software :)

Greetz Stefan