envelope follower / filter

[jah1234]

Cheers aciddose! thanks for the linked stereo version!

Cant believe you are releasing these for free. Top quality stuff. I almost regret buying some of my commercial plugins after you released this =).

One question though: Frequency mod and feedback mod parameters were introduced in some of these versions. Freq mod is a fixed frequency modulation of the cutoff parameter I assume (this is clearly audible)? What is feedback mod? I cant hear any difference when changing this parameter.

Thanks again.

[aciddose]

http://xhip.cjb.net/temp/public/xhipeff ... ter_v5.dll

this should fix the issue of having to adjust the input level, since now you can adjust the input level. defaults to -18db, the same as xhip.

the frequency mod. and feedback mod. parameters influence the amount of modulation from the input signal. frequency mod takes the input signal as modulation input for the filter's cutoff, the same as plugging the signal into the cutoff cv on an analog filter.

feedback modulation takes the input as modulation for the resonance, but it only uses the negative portion of the signal, and that decreases the resonance level so that with zero modulation you get full resonance as set by the resonance parameter, and with a full strength input signal as set by the input level parameter you get zero resonance. it isnt possible for the resonance to be increased by the input modulation. this works in a very simmilar way as this filter: http://xhip.cjb.net/temp/public/adfilt2.jpg

sorry for the terrible drawing, its only the second copy. this onei actually just drew last night, although the filter has been around for quite some time. its an all-transistor version of basically the same circuit as in the korg-35. when you increase the input level you get modulation of frequency and feedback since you're influencing the current through both transistors through which those signals also pass.

the reason i originally implemented these options was to be able to get the korg-35 (ms-10) filter timbres. i need to implement more saturation functions to really get a good emulation, but that isnt difficult. i've done some experimentation over time already, its just that i cant find a saturation function as stable as the one i'm currently using.

[Jonas78]

thank you for existing aciddose

[cheul]

And being so cool.

[aciddose]

for anyone interested in the schematic, i built it using those values, tested, works great. i'll do some audio demos after i wire it up correctly. there is an issue with cv feedthrough which leads to thumping, but this is all part of the sound of this specific filter. the feedthrough is less than 5%, so using a strong input signal (3v, 5v) it isnt too much of an issue. (full range frequency 20hz-20khz is roughly 0-10v, resulting cv feedthrough is about 500mv or less.)

btw not sure if this thread it the best place to post about this

suddenly the plugin wont seem so great anymore.

see how the frequency and resonance levels are influenced by the input signal though? this is what i was talking about.

[robenestobenz]

simply put,

this is the best filter I've heard, analog or digital.

No fish in the poll again

it comes with the bbq and mayo.

I'm inclined to agree. I'm no connoisseur, but the sound is just stunning. Hefty thanks to you, Accidose!

[Sw-Michael]

Thanks for a great plug. Instant acid on drums and bass if you tweak it right.

[brok landers]

ok aciddose, i played around with v5 for allmost 3 hours now ...
there are still some things to mention:
- it seems the brickwall is allways active, even if hard limit is set to off.
- the input slider is nice, i can now get the exact ammout of env amplitude that i want, but:
considering you have a loop leveled to exactly 0db (right before the input of the filter).
putting this into the filter makes me having to decrease the input, otherwise the env depth is way too big, even in it's smallest possible setting. so i decrease the input to, say -18db (why is this not 1db steps?).
ok, now i can tweak the env depth to my liking.
but now i have the problem that i by far don't reach the saturation/brickwall (right after the filtered signal), and i cannot increase the level _before_ the saturation/brickwall.

so, here's my suggestions:

- either place an output level slider right before the saturation/brickwall stage (0,25 db steps,range min-24db to max +24db, default =0db) or decrease the max env depth to the range it was on the mono version ... this range allready covered just about any useful setting ...
just to make my point clear:
what good is a brickwall, if one practically (i mean in most every use) doesn't reach it's threshold?

for more explanation:
i absolutely love the attack set to a minimum ...
as the env is so damned fast (love you for that), this really allows great use on just about any percussive material ...
but with the env attack set to very fast, the range of the env depth is (when the input stays on -36db) way to sensitive, explanation above ...
i hope you don't take this as moaning, i don't intend to do so ...
i just hope that my experiance helps you in some way, as we allways learn ...

[aciddose]

http://xhip.cjb.net/temp/public/xhipeff ... ter_v6.dll

i forgot to remove some code which was doing clipping that wasnt required, and i've increased the range of the input level slider. its in steps of 6db because it is done with a shift, so you're limited to powers of two.

if you're still having trouble with envelope depths after this, i have no idea why since it works fine for me. maybe you're not using the controls correctly? i do not even see why i should need to increase the input level range.

[brok landers]

will try out tomorrow, i'll let you know ...

[aciddose]

the analog filter , first prototype works good, but i've made some changes and i'll implement those some time in the future. for now, the signal level is too low through the filter so there is a lot of noise. in these examples i'm running at 700mv p-p input, which is tiny. this filter works just fine with proper range signals, its just i didnt think of that when i was drawing the schematic the first time around.

http://xhip.cjb.net/temp/public/adfilt02_fsweep0.wav
http://xhip.cjb.net/temp/public/adfilt02_choon.mp3

sorry i'm not much in the mood for playing music right now, but this gives you an idea of how it sounds. xhip's filter can sound pretty much exactly the same with high saturation, a medium level of frequency modulation and small resonance modulation.

here i was running the plain waveforms from my sh-09 which are fairly generic through the filter, modulated by a signal generator, then through a vca (the same type/series as the filter) controlled by ther sh-09 gate. i'm too lazy to mess with hooking up envelopes and that sort of thing since i have to disconnect it all to make the changes i talked about anyway.

filter works exactly as i expected it to. i'm not so much disappointed in it.. its just a shame xhip sounds so much damn better and sans the noise too. haha, what is the point of analog gear..

http://xhip.cjb.net/temp/public/adfilt02_pulxor.mp3

sounds _exactly_ like an ms-10 though. of course since this is basically the ms-10 vcf + vca.

[djsynchro]

xhipeffects_filter_v6.dll doesn't show up as a VST in Ableton Live 6.0.3
Everything else works. Great stuff by the way!!!!!

[aciddose]

'xhipeffects_filter_v6.dll doesn't show up as a VST in Ableton Live 6.0.3"

that is weird. i'll look closely to try to figure out why.

[squirm]

http://xhip.cjb.net/temp/public/xhipeff ... ter_v6.dll

404

the path you requested does not exist.

if a link from a page on xhip.cjb.net/* is broken, try using the emailer to inform me.

other than that, stuff comes and goes here all the time.

why

[squirm]

can someone please post this vst somewhre i want to try it badly thanks