Timo Kuchheuser

why do the low-gain frequencies of this sine wave "jump" up and down?

I also tried using another analyzer (iZotope Insight)... it shows me the same bevahiour?

I have the feeling it's not some kind of error. Can somebody please explain?

spectroscope~

ezdac~

flonum

cycle~

2019-08-20_20-31-04.gif

Hey all,
why do the low-gain frequencies of this sine wave "jump" up and down?
I also tried using another analyzer (iZotope Insight)... it shows me the same bevahiour?
I have the feeling it's not some kind of error. Can somebody please explain?

Hey all,
why do the low-gain frequencies of this sine wave "jump" up and down?
I also tried using another analyzer (iZotope Insight)... it s

reason-for-this-spectrogram-behaviour

it's just an artifact of the analysis process being done by the spectrogram; 

theoretically it should just be a single vertical line at 440 hz, not a curve, but because of variables such as

it's just an artifact of the analysis process being done by the spectrogram; 
theoretically it should just be a single vertical line at 440 hz, not a curve, but because of variables such as 

input signal wave table size
input signal bit-depth
analysis window size, 
analysis window shape, 
sample rate
phase of the signal
analysis algorithm

you get artifacts


Reason for this spectrogram behaviour