Feature request about sine wave generator

lorrain

New Member
Thread Starter
Joined
Sep 28, 2020
Messages
26
Location
France
My AV System  
Main Amp
SONY
John,
I suggest an improvement on the sine wave generator .
The possibility of adding sinus harmonic distortion is very interesting to see the effect on the THD, THD+N, .. It's a good way to have a better understanding of all this.
Similarly, I suggest the possibility to add low-level pink noise as well (pink random in particular). This also allows to simulate the background noise in equipments and to see the effect on THD, THD+N, …
Thanks
Eric
 

John Mulcahy

REW Author
Joined
Apr 3, 2017
Messages
5,121
Why pink? You can use the dither setting to add uniform noise, though the maximum level is at the 16th bit.
 

lorrain

New Member
Thread Starter
Joined
Sep 28, 2020
Messages
26
Location
France
My AV System  
Main Amp
SONY
Thank you for your reply.
I tested the dither/16 bits but no big effect on the noise (with my sound cards)
Pink noise (random) gives visual noise in spectrum mode similar to background noise (noise foor) and the interest for me of adding noise concerns the understanding of THD, THD+N, D+N,…
But I don't know if this request is relevant for that.
I am not a specialist in FFT and other mathematical functions, but software like REW makes it possible to understand many things because REW is both pleasant , easy to use , detailed , rigorous and well documented.
I fully understand that my request is perhaps not pertinent and does not fall within the priority of REW.
 
Top Bottom