• SONAR
  • correct spectrum analyzer use (p.3)
2013/03/04 19:10:45
TraceyStudios
yes i need to a spectrum analyzer....
2013/03/04 20:09:50
swamptooth
Bub


I won't do another screenshot ... ... but I just increased the scale on the Melda one too and it shows roughly the same as Cake and SPAN.

hey bub. yeah i just ran a 100hz sine wave through all three and they seemed to be the same, even when i threw on the hpf.  tried it with music and analyst was still showing movement well below the filter's cutoff frequency.  probably a resolution thing.  
2013/03/04 20:43:30
Bub
Hi Swamptooth ... I missed the part where you asked about the high pass filter so I tried it and did a screenshot. It does show something there ... but it's around -110db and it shows up on the other filters too.



Have you tried the 'Auto' function on the Cakewalk Analyst ... it is frickin' cool! :)

Throw the Analyzer on a track ... enable 'Auto' on the Analyzer, enable Automation Write 'W', hit play ... and watch the show.


It scans the audio of the track you have it on and creates envelopes at the  frequency ranges it detects.
2013/03/04 22:04:25
swamptooth
Yeah that's a cool one. comes in handy for targeting levels in frequencies and assigning the automation envelopes to corresponding frequency gain in the prochannel eq for neat little dips and stuff. :D
2013/03/04 22:56:04
drewfx1
Spectrum analyzers appear less accurate at lower frequencies. This is because they divide the frequency spectrum into equally sized portions while we divide it logarithmically into octaves with each successive octave being twice as large as the previous. As noted above, they often allow you increase the frequency resolution at the cost of reducing the timing resolution.

Also note that this problem becomes worse at higher sample rates. For instance, unless the spectrum analyzer automatically adapts its parameters to the sampling frequency (I don't know if any do this or not), you will get less frequency resolution at 96k than you will at 48k. I have seen people confuse themselves because of this when trying to compare sample rates with spectrum analyzers.
2013/03/06 11:31:43
TraceyStudios
I downloaded the freebie Voxengo Span and it does seem to be accurate. Then I discoverd there are multi channel spectrum analyzers, started browsing around.  I would really like to get one, but I have spent so much money lately that I am hoping to find a multi channel for cheap. Anyone have any suggestions for an inexpensive multi channel SA ?
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