Is your EQ workin' as you expect (some checked)
Well, digged out some free-/share-/donationware, demo and trial versions of different type EQ's from my harddrive for to make some measures/comparisons (like frequency response, magnitude, harmonic distortion, phase, etc.). Maybe this is not a good testing method but IMO, some of those results are surprising. If you like to check closer these EQs, you'll notice better those differences ..., I did use C.Budde's VST PlugInAnalyzer in this test.
VST Plugin Analyzer -
http://www.savioursofsoul.de/Christian/Programs/VSTPluginAnalyser.zip NOTE: Analyzer works @ 44.1kHz only (ATM) so, ...
UPDATE: ... the new version supports free samplerate selection.
Here are some results ... (these pictures shows if the EQ is "
What
You
See
Iis
What
Yout
Get" ~ "do you get what you're expecting" --> it's tested here by jus adjusting the gain for ~1Hz band to ~12dB-15dB or by drawing an EQ curve (if possible) .. Q/Bandwith setting is not taken in count ... just the frequency and gain).
What I have noticed already in
some of these EQs mentioned in my posts
- some EQs are working differently with negative gain values
- Bandwith/Q may have effect in magnitude level (may have programmed to do so)
- certain settings may get the magnitude curve alternate (and maybe even start producing "strange" curve forms)
- filters like HPF/LPF seems not to work as steep as maybe intend (I noticed this also while programming a rumble filter as a part of my RIAA filter) ! I was thinking if the Analyzer is culprit for this but as it just plots the output data coming from VST so, could it be then?
so remember check these too, when you're 'testing' your EQs!
EDIT: Linked some pictures which are showing resuls of harmonic distortion (but, only for those EQ plugins which had some 'issues' in distortion results showing up in "hearable" area).
NOTE: I got some warnings that magnitude and harmonic distortion measures may not be valid in all cases (meaning mainly Linear Phase EQs) ... when you get strange results, try correct this by changing the latency compensation in analyzer (press [CTRL]+[ALT]+[L] .. and try as for an example with new value as 8192). AnwidaSoft GEQ31V 1.5:
http://www.anwida.com/product.asp?pid=11 http://img82.imageshack.us/img82/8158/anvidasoftgeq31yx6.jpg ! Harmonic Distortion:
http://img514.imageshack.us/img514/4056/hdanvidasoftgeq31zt0.jpg - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
AnwidaSoft GEQ15V 1.5:
http://www.anwida.com/product.asp?pid=10 http://img516.imageshack.us/img516/2955/anwidageq15voh3.jpg ! Harmonic Distortion:
http://img155.imageshack.us/img155/5189/hdanwidageq15vha1.jpg - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
AnwidaSoft PEQ1V 1.0:
http://www.anwida.com/product.asp?pid=23 http://img503.imageshack.us/img503/2853/anwidapeq1vtm2.jpg ! Harmonic Distortion:
http://img95.imageshack.us/img95/1391/hdanwidapeq1vvx3.jpg - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Bluecat Stereo Liny EQ 3.0:
http://www.bluecataudio.com/Products/Product_StereoLinyEQ/ http://img120.imageshack.us/img120/5683/newbluecatlinyzv4.jpg ! Harmonic Distortion:
http://img228.imageshack.us/img228/9872/hdbluecatlinyeqhl4.jpg - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
BlueCat Stereo Parameter 'EQ:
http://www.bluecataudio.com/Products/Product_StereoParametrEQ/ http://img144.imageshack.us/img144/8182/bluecatstereoparameteresj9.jpg ! Harmonic Distortion:
http://img205.imageshack.us/img205/5976/hdbluecatstereoparameteyo3.jpg - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Crysoic CRY 'Q 1.0:
http://www.crysonic.com/cryq.html http://img514.imageshack.us/img514/3381/crysoniccrylu6.jpg ! Harmonic Distortion:
http://img407.imageshack.us/img407/5544/hdcrysoniccryqv2.jpg - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
ddmf IIEQ 1.12:
http://www.ddmf.eu/IIEQ.htm http://img152.imageshack.us/img152/7049/ddmfiieqeg3.jpg - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
KarmaFX EQ 1.1b:
http://karmafx.net/ http://img413.imageshack.us/img413/2325/newkarmage7.jpg ! 6/12/24dB switch means ±3/±6/±12 dB
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Kjaerhus Classic EQ 1.0.4 :
http://www.kjaerhusaudio.com/classic-eq.php http://img100.imageshack.us/img100/8383/kjaerhusclassiceqya6.jpg - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Kjaerhus GEQ-7 1.1.2:
http://www.kjaerhusaudio.com/geq-7.php http://img178.imageshack.us/img178/730/kjaerhusgeq7pl5.jpg - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Lizzaudio LizzGRAPHIC 1.0:
http://www.geocities.com/lizzaudio/vst.htm http://img246.imageshack.us/img246/6581/lizzgraphiceqen4.jpg - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Piotr 'Habib' Pyrzanowski Eq31 1.02 :
http://habib.webhost.pl/vst_eq31.php http://img514.imageshack.us/img514/6885/phabibeq31py7.jpg - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
David Ross EQ18 1.0:
http://www.davideross.net/php/vst.php http://img523.imageshack.us/img523/1118/rossieq18of7.jpg - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
SlimSlowSlider LPG EQ 2.1.5 :
http://www.geocities.jp/webmaster_of_sss/vst/index.html#lpgeq2 http://img511.imageshack.us/img511/9100/newssslpeqof5.jpg ! 6, 12, 24 or 96dB gain can be achieved only if all bands are set its max/min value ?
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Starplugs Master EQ 1.01:
http://www.starplugs.com/sess/utn;jsessionid=15463c94e89e5ed/shopdata/?main_url=go.shopscript%3Fa%3D1305 http://img242.imageshack.us/img242/2980/starplugsmastereqgt5.jpg ! Harmonic Distortion:
http://img228.imageshack.us/img228/5033/hdstarplugsmastereqfw8.jpg - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Voxengo EssEQ 1.4:
http://www.voxengo.com/product/esseq/ http://img524.imageshack.us/img524/3066/voxengoesseqrh3.jpg - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Voxengo Overtone GEQ 1.2:
http://www.voxengo.com/product/overtonegeq/ http://img441.imageshack.us/img441/5712/voxengoovertonegeqnd4.jpg ! Harmonic Distortion:
http://img407.imageshack.us/img407/861/hdvoxengoovertonegeqwo8.jpg - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Aixcoustic Electri-Q Poshifopit: 1.7:
http://www.aixcoustic.com/index.php/posihfopit_edition/30/0/ http://img99.imageshack.us/img99/4200/elqposhiof3.jpg ! Harmonic Distortion:
http://img201.imageshack.us/img201/5142/hdelqposhiwn9.jpg - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
"Original" audio da onca/C.Budde posihfopit 1.3.5:
http://www.savioursofsoul.de/Christian/?page_id=8 http://img99.imageshack.us/img99/7119/posihfopitxe6.jpg ! Harmonic Distortion:
http://img407.imageshack.us/img407/9848/hdposihfopitgg2.jpg - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Magnus: NyquistEQ5 :
http://magnus.smartelectronix.com/ http://img155.imageshack.us/img155/6076/magnusnyquisteqli6.jpg - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Voxengo CurveEQ 2.5:
http://www.voxengo.com/product/curveeq/ http://img246.imageshack.us/img246/7805/newcurveeqix5.jpg - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Voxengo GlissEQ 2.8.1:
http://www.voxengo.com/product/glisseq/ http://img142.imageshack.us/img142/685/voxengoglisseqhf4.jpg - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Voxengo Haromoni EQ 1.4:
http://www.voxengo.com/product/harmonieq/ http://img178.imageshack.us/img178/471/newharmoniqsu5.jpg ! Harmonic Distortion:
http://img522.imageshack.us/img522/7223/hdvoxengoharmonicsr7.jpg NOTES:
- some of these EQ's are maybe 'special made' (Harmoni EQ as for an example) so it's its nature to produce exceptional results
- most do also have a 'bandwith/Q' setting so if the curve looks too steep/rounded it's maybe possible to adjust a bit more steepness/roundness....
If you're using other than those above mentioned EQ's, it would be nice if you could continue this list.
Junski
post edited by Junski - 2007/05/12 12:35:59