Formant Filter for Octatrack

[sezare56]

Thanks ! Don’t you lower the volume VOL ?
Yesterday I made tests with wrong frequencies on a white noise sample, with a lot of harmonic material

[sleepystevo]

sorry yes…edited for clarity… I’ve been sick on the couch all week, at least that’s my excuse…

[sezare56]

Windows Xp wallpaper is your remedy ?

[sleepystevo]

it’s one of those classic timeless images, like that one of the big pink sunset, cheesy & comforting & nostalgic all at the same time, so if this doesn’t cure me then i’m afraid nothing will

[sezare56]

Hi. I hope you feel better.
I had very interesting results with your informations, thanks. I found that Q could be lower. I prefered to have 4 different eqs per tracks, then copy track for neighbor.
One track is almost enough.
A saw wave seems better.

I made scenes, and modulated them with random lfos with midi tracks (CC55-56), and used a random speed modulated tri lfo for the CC48 crossfader.

As filters have 2 Q res + Env, I think it’s possible to have better results with them. In order to save tracks, maybe you can use only 2 frequencies.

Edit. It works pretty well with 1 regular filter and above frequencies !

[sleepystevo]

Very clever with the filter, bravo! I’ll give that a try myself!

[sezare56]

It is still better with 4 frequencies.
With filters only you need 2 tracks if you want 4 fqs, with 2 Thru or 2 tracks playing the same sample :
T1 > F1 F2 (+ FX2)
T2 > F3 F4 (+ FX2)

I found interesting to use filter AND eq, in order to use only one track, and be free to chain 2 FX with a Neighbor track :
Filter > F1 F4
EQ > F2 F3
If you place filter after eq, it seems to sound the same.

It sounds different with the filter, especially because of the bandpass. 24db settings accentuate the bandpass.

[dobermate]

Hey - any chance of showing even more in terms of Filter settings, etc?

[sezare56]

I’ll try tonight. Remind me, if not, I’d be interested in testing this again…

[dobermate]

Would really appreciate it, man . I’m starting to explore the OTs a bit more, cherry picking some of your crazy initiatives

[sezare56]

You can thank @sleepystevo!
I can’t remember if I wrote frequency values somewhere. IIRC someine made a sheet with OT filter values and corresponding freqs…

Eq values

OT filter and EQ values?

I tired to measure the frequency of the OT equalizer a looong time ago. Im not sure if my measurements are really reliable some values seems strange to me Anyway here is what I found (left column = equalizer value, right = frequency in Hertz) : 6 8.075 10 10.7666 12 10.7666 14 13.4583 16 16.1499 22 21.5332 26 26.9165 28 32.2998 30 34.9915 32 40.3748 34 45.7581 36 51.1414 38 59.2163 40 67.2913 42 80.7495 44 86.1328 46 104.9744 48 118.4326 50 13…

OT filter and EQ values?

Rplot.pdf (105.5 KB)

[dobermate]

Fantastic - very much appreciated!

[sezare56]

@dobermate

showing even more in terms of Filter settings

Octatrack - Formant Filter

I used A and I vowels

F1 is Filter Base
F2 is EQ1
F3 is EQ2
F4 is Filter width
(F1+width=F4, width=F4-F1)

@sleepystevo

[dobermate]

Just pure gold, man!!!

[sezare56]

Let me know if something is unclear. Maybe I’ll redo or edit the video…

Luckily filter and eq frequencies seem to correspond.
IIRC I used different formant frequencies for my first test a while back…

[darenager]

Freeez - IOU

[sezare56]

@darenager, that’s not very nice of you. Now I have to try to reproduce this A, E, AEIOU part.

Maybe it’s better to make F3 and F4 with EQ, because they are lower. In that case it’s probably better to set WIDTH to - 12db.

Anybody knows what is BW?

[Merv]

bandwidth?

[darenager]

Yeah bandwidth.

[darenager]

@sezare56

Now I have to try to reproduce this A, E, AEIOU part.

I knew you’d do it! But it has got to be worth points