SynthMaker

FFT Display Graph Bug

Archive · 2009 3 old posts

From the original SynthMaker forum (2004–2014), with its members’ names and dates.

FreeRideSkier ·

It appears that there is an error on the FFT Display graphs.

It looks like who ever made these FFT graphs used 20Hz -20Khz as the range when in fact for 44.1Khz its up tp 22050hz.

Therefore there is a 10% error in the graphical readout.

For example if you set a sine osc to 10Khz then look at the FFT graph it shows about 9Khz.

I have checked the FFT calculation and it appears correct, therefore the bug is in the x axis of the graphs.

Andrew J ·

You might notice that some of these aren't OK for sample rates other than 44.1KHz too.

sunsynth ·

Hmm, change the value in the 'Graph Lines Vert'-Modul...

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