Collaborative project!

[lalalandsynth]

@ustk

We have taken it this far , why not add the chorus/Vibrato :)

1. I could do that with the Leakage.

2. There are two knobs for Chorus and Reverb , in the project (currently) there is a slider for the Reverb (Amount) but only a switch for the Chorus. Can we replace the Chorus switch with an slider (Amount)

3. OR , the Chorus slider could be different settings ? Or both (Amount) -(Setting)

4. Or we could do it like this!
   If we do it like this its probably best to keep the leakage as a linear slider rather then the "Age" setting as there would not be space for the markings if its moved to the small slider.

Chorus /Vibrato Info.

Three degrees of vibrato are available and also a different degree of chorus or celeste effect with each of the three degrees of vibrato.
A vibrato chorus effect, similar to the effect of two or three slightly out-of-tune frequencies mixed together, is obtained when the vibrato output signal is mixed with a portion of signal without vibrato. For vibrato chorus, part of the incoming signal appears across the vibrato line and the rest across a resistor in series with the line. As the vibrato effect is applied to the part of the signal appearing across the line but not to the part appearing across the resistor, the combination produces a chorus effect. For normal vibrato, this resistor is short-circuited.

Service Manual – The Hammond Vibrato – Benton Electronics

(bentonelectronics.com)

Hammond B3: Drawbars, Presets, & Controls

In this lesson, we explore the anatomy of the Hammond B3 organ and discuss the Hammond B3 drawbars, manuals, presets, pedals, percussion circuit, and chorus vibrato settings.

PianoGroove.com (www.pianogroove.com)

[ustk]

@lalalandsynth Thanks for the info, I'm already working on the vibrato/chorus.
I found a rate of 6.87Hz somewhere.
But for the 3 different amounts, I don't know. The link you provided might speak of that so I'm studying.
Also, they have to sound even if not really like the original (but it's impossible anyway...)

I like what you suggested in the example. vib on/off on the left with a C1-3/V1-3 rotary, and leakage on the left ;)

[lalalandsynth]

We could also add this and really finish it off :)

[ustk]

@lalalandsynth A saturation, if it's sounding good, would be awesome!

[ustk]

I wasn't pro going further, but now it's so cool I don't wanna stop!

[lalalandsynth]

@ustk Yes, an attempt at some kind of growl would be nice.

I will be calling a friend that plays the Hammond later today for some insights.

[lalalandsynth]

@ustk said in Collaborative project!:

I wasn't pro going further, but now it's so cool I don't wanna stop!

hehehe

[ustk]

@lalalandsynth @hisefilo Chorus could have an option to be stereo, sounds great

[lalalandsynth]

@ustk After talking to my friend that is always playing an Hammond B3.

Here are the issues he mentioned, I am not making a judgement if any of this needs to be implemented but thought I would share.

1.Keyclick

He said this was very important to the Hammond sound and not related to the Perc. It is due to the Drawbars all having different switches when you push a note , sometimes when you push softly you would only hear one drawbar, so when they are a bit worn you can hear a click when you play the note as it engages the drawbars sequentially via the key travelling down.

I would assume this is age related.

He emphasized this being essential to the Hammond sound and a dead giveaway for a poor emulation. He also said that any old click will not work :)
EDIT: We discussed sampling this but apparently it will not click unless at least one drawbar is engaged so that might cause problems in terms of isolating the click.

-----Possible Solution/Implementation ---
Trigger a click sample ..3 different volume settings ?

2.Saturation.

On the Hammond you obviously do not have Velocity so what he said is a big part of the sound is playing the volume pedal , and not only the volume because via the volume pedal you can overdrive the Leslie.

-----Possible Solution/Implementation ---
Add Saturation OR make volume knob reach say 85% max volume at 50% rotation , then when you go from 50 to 100% it will start adding saturation , this way you can automate the volume button and emulate this .

Chorus/Vibrato.

As for the chorus he said that was very unique , he uses the chorus more then the vibrato. Settings are Depth only.Vibrato 1-3 Depth.Chorus 1-3 Depth.

Rotary:

I am not sure how the rotary is implemented in the plugin but obviously the lower horn has a different speed then the upper horn but what he mentioned was often missing from emulation was the fact that when speed is changed they accellerate at different speeds also , he said this was important and used in an expressive way.

Alos when Mic-ing a Leslie , there is one mic on the lower horn and two mics on the top horn in 45Degrees on one corner. So when using the Leslie in the stop position , you might hit the speed lever to move the top horn just a tiny bit to change the sound to the mics.

Although there being 2 top horns there is only sound from one of them , reason for there being 2 is just mechanical balancing.

-----Possible Solution/Implementation --
Everything below a certain frequency mono -Lower horn . Everything above certain frequency , stereo - Top horn.

-----Consideration---
The Leslie is therefore not OFF as such but stop which raises the question if this needs to be implemented somehow , like running the sound in the OFF/Stop position through the Leslie Crossover emulation and possibly shifting phase ?
Not sure.

Dont know if this needs to be implemented?

[lalalandsynth]

@ustk I am assuming the Rotary/Leslie is stereo ?

[ustk]

@lalalandsynth Very good shout!
On my side, yes the Leslie is stereo. And yes the acceleration is different for both speakers (in the next commit) but I don't know what are the original two acceleration timing so I guessed them...

Your friend will be a great asset for testing the beta :)

[lalalandsynth]

@ustk yes, he is ready and willing :)

*Still need to fix the final knob renders , there are visible ridges that I need to fix and the shadows are a bit hard.
Badabing.

[hisefilo]

@ustk @d-healey well. heavily tested it and there's something that is not good. It's not polyphonic I guess. Meaning if the < 0.025 time condition is archived, many notes are stoped same time, even if they are already decaying. Causing a weird glitch. Any idea how to prevent that?. The > note idea is getting better results but same thing at some point (weird notes stoped)

    note++;
	
	if (note > 3){
	
	    Message.ignoreEvent(true);
	}

[hisefilo]

@lalalandsynth like it!!!!

[lalalandsynth]

Question , Can a knob/slider rotate endlessly ?
It is kind of weird rotating the 6 position Vibrato/Chorus knob but it stops at setting 6 rather then go back to setting one .

[hisefilo]

@lalalandsynth said in Collaborative project!:

Super valuable information :)

1. I did some ms of delay for emulating that. Thing is Midi is noteon-noteoff, and no other data in between. Maybe we can add a script that increases that delay if velocity is > 20 or something like that

2. EFFECTS >> Agree, saturation will be nice. Chorus and leslie can be tweaked for years :) don't know if we are on that plan

I think this is good to be implemented if we have the time. Maybe we can do a PRO version later....

[ustk]

@lalalandsynth I can script an infinite rotation knob with a panel

@hisefilo You're absolutely right!

[d.healey]

@hisefilo

many notes are stoped same time, even if they are already decaying

It should only affect the noise generator, is that what you're referring to?

[hisefilo]

@lalalandsynth

Question , Can a knob/slider rotate endlessly ?
It is kind of weird rotating the 6 position Vibrato/Chorus knob but it stops at setting 6 rather then go back to setting one .

I guess this is ok. Making a infinite rotating know is not possible. AFAIK

[hisefilo]

@d-healey Ohh, on noise generator you wont hear that. On Perc Harmonics (300ms decay) you'll hear it. Will record an example