aliasing comparison

Spirit · Post by **Spirit** » Mon Mar 25, 2002 4:39 am

Might interest some:
http://www.simonv.com/music/quality/
http://personal.inet.fi/taide/jeskola/SamplerTest/

[ This Message was edited by: Spirit on 2002-03-25 04:48 ]

Post by **hubird** » Mon Mar 25, 2002 6:31 am

thanks Spirit, now I know how aliasing sounds!
I want my Kurzweil K2500/RS win this test, may be I'm gonne make this test!

Lima · Post by **Lima** » Wed Mar 15, 2006 5:37 am

Cool and instructive! Thanks

djmicron · Post by **djmicron** » Wed Mar 15, 2006 5:13 pm

this test is a little bit old......

at0m · Post by **at0m** » Sat Mar 18, 2006 12:34 pm

hubird, glad you now know how it sounds

Weird, how you never noticed it... finally you can compare how aliasing is different on your keyboard playing synths at 44.1 or 96kHz.

Notice especially when playing the highest notes.

Recently someone posted a link with an example everyone knows: watching TV, if you see a car's wheels, if the wheel spins at 24 rounds per second and video feed is at 25fps, the wheels will look as if they'd turn in reverse. Same happens to audio, when digital synthesis wants to make a frequency above niquist, they will be folded back in the audible spectrum. As samplerate increases, so will niquist, and these artefacts will move to higher/unaudible frequencies.

ps. synthesis is /much/ more sensitive to aliasing than sampling.
_________________
more has been done with less

[ This Message was edited by: at0m on 2006-03-18 12:37 ]

valis · Post by **valis** » Sun Mar 19, 2006 1:26 am

Contact Simon V. He's typically responsive and if you provide newer results I'm sure he'll post them up.

astroman · Post by **astroman** » Sat Mar 25, 2006 12:20 pm

it was originally posted even earlier, > than half a year or so back, but my mem fails, too

cheers, tom

btw it's a bs test setup of zero practical relevance - a tambourine transposed 8 tones up and down

if you optimize to some nonsense like that you can yield some great benchmarks...

[ This Message was edited by: astroman on 2006-03-25 12:30 ]