dual or bi phaser and flangers

[markphaser]

Nice Paul This might be the way to go

[R.G.]

Thanks for the information.

don't know about that network i guess reverse bias the diode for variable resistance
How would a reverse bias diode variable resistance work with an inductor to do this?

0-180 degrees
But not 181-360 degrees? I heard somewhere that these were the same, but backwards.

Discrete would be static delay time, continous would be modulated
Yes, but discrete time delay on the LFO, not the signal? Would you modulated in steps?

Does the MXR phase 90 speed pot have the same frequency from slow to fast i doubt that
No, I think it varies. So did you want varying frequency? Or stepped frequency?

yea if your using 2 LFOs its like using 2 function generators
Can you do LFOs with function generators?

NO its just going to adjust the starting phase of the LFO's not modulate them
But you said that the LFOs change frequency. Isn't that modulation?

depends on how many VOICES meaning phase filters i use
Is phase filtering the same as voicing. I always heard about voicing and is that how they do that?

[markphaser]

don't know about that network i guess reverse bias the diode for variable resistance
How would a reverse bias diode variable resistance work with an inductor to do this?

I guess use the diode as a vactor?
I'm not sure u tell me

0-180 degrees
But not 181-360 degrees? I heard somewhere that these were the same, but backwards.

Yes its inverted or reverse polarity can use a phase splitter or inverter stage

Discrete would be static delay time, continous would be modulated
Yes, but discrete time delay on the LFO, not the signal? Would you modulated in steps?

Yes u put a BBD chip stage after the LFO output to adjust the discrete time delay of the LFO

Modulate in steps: i'm guessing use a A/D converter?   LFO output>> to a A/D converter to a OTA control pin
so it steps the voltages to the control pin of the OTA

Or try a gating section off/on circuit with a trigger pin use a 555 timer to control the gating

LFO output >>> gating circuit with 555 timer>>>Light/LDR

Does the MXR phase 90 speed pot have the same frequency from slow to fast i doubt that
No, I think it varies. So did you want varying frequency? Or stepped frequency?

What do u mean by stepped frequency? varying frequency is in steps "instantance values steps"

yea if your using 2 LFOs its like using 2 function generators
Can you do LFOs with function generators?

Sure why not a LFO is a function generator is just limited

NO its just going to adjust the starting phase of the LFO's not modulate them
But you said that the LFOs change frequency. Isn't that modulation?

LFO is SET at a frequency if it was ""AUTOmated"" or controlled then its modulated

***LFO is set at a frequency but at what phase angle?***

depends on how many VOICES meaning phase filters i use
Is phase filtering the same as voicing. I always heard about voicing and is that how they do that?

For chorus stages they call them voicing because of the pitch bending and how its pitch bend is the art and science of a chorus pedal designer




What does R.G mean: Richard Gere

R.G maybe when you enroll back in acting school they might teach you that u need a attitude adjustment kinda of been growing on you for a long time now or maybe you can play alittle kid that can't act his/her way out of a paper bag sounds like your true calling more than a electronic guitar pedal invertor big guy.

[gez]

I once posted a schematic for a simple (yes, such a thing exists) quad triangle generator.  It could be modded quite easily to do variable phase shift.  The shift would be just within 0 - 180 degrees though, but could be modulated by a further LFO.

I don't have the image anymore, so if somebody here saved it either post it or send it to me (PM me for my email) and I'll post it and outline how you'd do this.

[Thomas P.]

but if one would build a simple phaseshift network for the second lfo wouldn't the phaseshift be frequenzydependend?
What I mean is: With a certain lfo frequenzy and a certain phase shift - if you alter the frequenzy, you will alter the phase shift.

[gez]

What I mean is: With a certain lfo frequenzy and a certain phase shift - if you alter the frequenzy, you will alter the phase shift.

Depends on the design.  What I designed doesn't have this problem.

[gez]

Whoops, scratch my last 2 replies.  Wasn't thinking (morning posts)! 

[Thomas P.]

what I thought: If you try to shift the phase with some kind of LC or LCR network you have a driven oszillator. And the phase is determined by the driving frequenzy and the resonance frequenzy...
but maybe I'm on a completely wrong train here.

[gez]

what I thought: If you try to shift the phase with some kind of LC or LCR network you have a driven oszillator. And the phase is determined by the driving frequenzy and the resonance frequenzy...

The quad LFO I designed could be modded to provide variable fixed phase shift and wouldn't have a problem with phase shift varying with frequency as there's no LCR network, it's just that the phase shift wouldn't be that much (just within 90 degrees) so not worth the effort.

[R.G.]

Thanks for the information.

I guess use the diode as a vactor?
I'm not sure u tell me
I'm not sure i can

0-180 degrees
But not 181-360 degrees? I heard somewhere that these were the same, but backwards.
Yes its inverted or reverse polarity can use a phase splitter or inverter stage
but can you just use an inverter to get these?

Discrete would be static delay time, continous would be modulated
Yes, but discrete time delay on the LFO, not the signal? Would you modulated in steps?
Yes u put a BBD chip stage after the LFO output to adjust the discrete time delay of the LFO
so then for a shifted LFO u just use a BBD chip? would that mean two BBD chips per chorus?

Modulate in steps: i'm guessing use a A/D converter?   LFO output>> to a A/D converter to a OTA control pin
so it steps the voltages to the control pin of the OTA
How would u hook up the OTA? Wouldn't the voltage input to the OTA burn out the OTA current input?

Or try a gating section off/on circuit with a trigger pin use a 555 timer to control the gating
LFO output >>> gating circuit with 555 timer>>>Light/LDR
i thought that gates were logic circuits. How does a 555 have gates?

Does the MXR phase 90 speed pot have the same frequency from slow to fast i doubt that
No, I think it varies. So did you want varying frequency? Or stepped frequency?
What do u mean by stepped frequency? varying frequency is in steps "instantance values steps"
what is an instantance values step? Can u explain how that works?

yea if your using 2 LFOs its like using 2 function generators
Can you do LFOs with function generators?
Sure why not a LFO is a function generator is just limited
So what functions can a LFO do that a function generator can't?

NO its just going to adjust the starting phase of the LFO's not modulate them
But you said that the LFOs change frequency. Isn't that modulation?
LFO is SET at a frequency if it was ""AUTOmated"" or controlled then its modulated
***LFO is set at a frequency but at what phase angle?Huh***
i thought that frequency modulation did change the phase. How is frequency modulation different from phase modulation?

depends on how many VOICES meaning phase filters i use
Is phase filtering the same as voicing. I always heard about voicing and is that how they do that?
For chorus stages they call them voicing because of the pitch bending and how its pitch bend is the art and science of a chorus pedal designer
OK, so pitch bending is an art and science in chorus stages.
Is pitch bending because of phase, time delay, LFO or just a conrtol setting?

Can you change phase on an LFO directly by a control on the pedal?

How can you do this, please?


What does R.G mean: Richard Gere
Well, thank you. I always thought Richard Gere was a nice guy.

R.G maybe when you enroll back in acting school they might teach you that u need a attitude adjustment kinda of been growing on you for a long time now or maybe you can play alittle kid that can't act his/her way out of a paper bag sounds like your true calling more than a electronic guitar pedal invertor big guy.

no, i never was any good at acting. I was always a better invertor than an actor. I could invert anything. Well once I could. Sometimes I couldn't invert them back.

Best regards, in peace and purity of essence.

[David]

This thread has been reported.
I suggest it be moved to the Lounge or locked.

[R.G.]

Kewl. I'll vote for that.

[TELEFUNKON]

pic gone

[gez]

pic gone

A kind forumite sent it to me, but I can't upload it yet: need to install AOL's 'vista ready' software first 

When (if?) I manage to upload it I'll post again.

[gez]

Not worth modding to create variable phase shift IMO as it would be less than 90 degrees.  Still, it's back up on-line for anyone to use how they see fit/unfit