12 String Guitar Preset

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J20056
Joined: Feb 1 2008
Posts: 217

12 String Guitar Preset

J20056
November 15, 2009 - 09:25 pm

Are there any such presets? Can't find one on the H7600.

What I was able to do is use a +1 oct and +2 oct shifter (preset # 5411 4_PitchShift). Then I use a high-pass filter from my digital mixer to boost the highs on the Eventide processed signal with some added analog chorus, and remove some lower frequencies. I find that the biggest problem is the low E and A, and to some extent D, as those would need a +2 oct and not +1 oct.

As a result of this analog experimentation, which sounds kinda nice, but complex, requiring mixer, chorus hardware and so on, I was thinking of a VSigfile algorithm based on the open guitar notes in standard tuning, and their corresponding frequencies, as follows:

1. If Dry Freq < D note, then + 2 oct at -3db (adjustable)

2. If Dry Freq between D and G, then +1 oct but with -6db and +2 oct at -3db

3. if Dry Freq > G then + 1 oct at -3db and +2 oct at -6db

4. Add a nice clean chorus to the processed signal and possibly a small amount of reverb

So the question is how to apply some gain based on the analog frequency of an incoming note or signal, and overall, how to implement this algorithm. I'm happy to try, buyt I could use some pointers. Thanks.

IDeangelis
Joined: Jan 9 2008
Posts: 1470
IDeangelis
November 16, 2009 - 04:57 am

This ain't easy, nor will always work fine as A and D strings note frequencies can also be played fretting E and A strings.... so it would trigger the fx when you don't need it.

Anyway there is a PITCHDETECTOR module which has a frequency output. This is useful for frequency based "conscious" applications. Then a COMPARATOR/COMPARATOR2/C_COMPARATOR module may be used, along with some other math and control modules to realize what you need.

best

I

J20056
Joined: Feb 1 2008
Posts: 217
J20056
November 19, 2009 - 08:52 am

So I implemented the module below. I used a low pass filter and and high pass filter instead of testing the frequencies as per my initial question. Frequencies below the low pass (typically set at 400Hz) have a +2 oct dominance and a lesser, if any, + 1oct. Frequencies above the high pass (typically set at 400Hz as well) have a + 1oct dominance and a lesser +2 oct. I also try to add a low frequency chorus on the high pass.

So it sort of works, but the biggest problem is that there is some sort of "flubber" in the sound, can't really describe it, but it's obvious when you use the preset. I wonder if it has to do with applying EQ in combination to pitch shifting, although on whole octaves.

It makes it kind of hard to use, unless the gain is much lower. I don't think it's due to the chorus being applied to only the shifted freqs above the high pass, as it did the same thing without the chorus.

Dunno, if anyone has any ideas, I'm sharing the module below in case we can make it work better.

PS: I researched what other software does, via users groups. I found a few "naive" presets on the Guitar Rig site where all they do is shift the entire signal by +1 oct and nothing else. It sounds disastrous, yet the users seem to think it sounds good. I guess they never heard an Eventide...

HEADM adc 2 2 stereomixer1-left stereomixer1-right "12 String v2" Empty 1 "Main Menu-obj" ;=200,0,100,0

FILTER "High Pass R" adc-in2 "HP Freq-out" 0 2 ;=300,75,100,0

KNOB "HP Freq" "HP Freq: %5.0fHz" "HP Freq" 25 20000 5 400 ;=150,225,100,0

FILTER "High Pass L" adc-in1 "HP Freq-out" 1 2 ;=450,25,100,0

MENUPAGE "Main Menu" "12 String" "12 Str" 9 "Dry Gain-obj" "HP Freq-obj" "HP Gain-obj" "LP Freq-obj" "LP Gain-obj" "L Shift Freq-obj" "L feedback-obj" "L Shift Freq1-obj" "L feedback1-obj" ;=300,425,100,0

STEREOMIXER stereomixer1 6 adc-in1 adc-in2 "L shiftMix-out" "L shiftMix1-out" "pitchshift L1-out" "pitchshift R1-out" "Dry Gain-out" "Dry Gain-out" "HP Gain-out" "HP Gain-out" "LP Gain-out" "LP Gain-out" -1 1 -1 1 -1 1 ;=600,25,100,0

KNOB "Dry Gain" "Dry Gain: %3.0fdb" "Dry Gain" -100 0 1 -3 ;=450,175,100,0

KNOB "HP Gain" "HPass Gain: %3.0fdb" "HP Gain" -100 0 1 -6 ;=450,300,100,0

PITCHSHIFT "pitchshift L" "High Pass L-out" 21 -60 10 adc-null 1200 0 0 ;=825,150,100,0

PITCHSHIFT "pitchshift R" "High Pass R-out" 21 -60 10 adc-null 1200 0 0 ;=1025,25,100,0

KNOB "LP Freq" "LPass Freq: %5.0fHz" "LP Freq" 25 20000 5 400 ;=400,650,100,0

FILTER "Low Pass L" adc-in1 "LP Freq-out" 1 0 ;=600,650,100,0

FILTER "Low Pass R" adc-in2 "LP Freq-out" 0 0 ;=775,650,100,0

PITCHSHIFT "pitchshift L1" "Low Pass L-out" 21 -60 10 adc-null 3600 0 0 ;=975,425,100,0

PITCHSHIFT "pitchshift R1" "Low Pass R-out" 21 -60 10 adc-null 3600 0 0 ;=1150,425,100,0

KNOB "LP Gain" "LPass Gain: %3.0fdb" "LP Gain" -100 0 1 -6 ;=100,675,100,0

FREQSHIFT "L freqshift" "L shiftMix-out" "L Shift Freq-out" ;=1625,700,100,0

MIX "L shiftMix" "pitchshift L-out" "L freqshift-out" 1 "L feedback-out" ;=1450,700,100,0

KNOB "L Shift Freq" "HL Shift Freq: %5.2f Hz" knob -10 10 0.01 1.4 ;=1175,725,100,0

PERCENTKNOB "L feedback" "HL fback: %4.0f %%" percent -100 100 1 40 ;=1300,725,100,0

PERCENTKNOB "L feedback1" "HR fback: %4.0f %%" percent -100 100 1 40 ;=1325,875,100,0

KNOB "L Shift Freq1" "HR Shift Freq: %5.2f Hz" knob -10 10 0.01 1.4 ;=1175,875,100,0

MIX "L shiftMix1" "pitchshift R-out" "L freqshift1-out" 1 "L feedback1-out" ;=1475,850,100,0

FREQSHIFT "L freqshift1" "L shiftMix1-out" "L Shift Freq1-out" ;=1700,900,100,0

IDeangelis
Joined: Jan 9 2008
Posts: 1470
IDeangelis
November 19, 2009 - 09:40 am

Not clear why you use frequency shifters modules. Try removing them.

best

I