madbeanpedals::forum

Projects => General Questions => Requests => Topic started by: pandadandan on May 10, 2010, 07:53:13 AM

Title: Tremolo / Phaser
Post by: pandadandan on May 10, 2010, 07:53:13 AM
I need one of both!
 ;D
Title: Re: Tremolo / Phaser
Post by: madbean on May 10, 2010, 09:16:28 AM
I'm working on a version of the Demeter Tremulator...actually it's built and waiting for a debug.

No phaser yet, but that is certainly under consideration. Were you thinking a Phase 45/90 or something else?
Title: Re: Tremolo / Phaser
Post by: pandadandan on May 10, 2010, 12:13:47 PM
I'm working on a version of the Demeter Tremulator...actually it's built and waiting for a debug.

No phaser yet, but that is certainly under consideration. Were you thinking a Phase 45/90 or something else?

I'm all about the raft of a million controls kind of deal.  The Tremulator sounds lovely from what I've heard of it.
With phasers, I guess the phase 45/90 thing is okay, but I'd loooove the maestro stage phasers  ;) ;) ;) ;)
Title: Re: Tremolo / Phaser
Post by: madbean on May 12, 2010, 03:00:02 AM
Right on. Thanks for the suggestion on the Maestro. I do want to add a good phaser, but I've only built the 45, personally. Or, maybe I'll just design one.  ;)
Title: Re: Tremolo / Phaser
Post by: pandadandan on May 12, 2010, 10:36:55 AM
Right on. Thanks for the suggestion on the Maestro. I do want to add a good phaser, but I've only built the 45, personally. Or, maybe I'll just design one.  ;)


Check out the "Fleetwood Mac" sound from 2:00 onwards.  LUSHHHH.
Title: Re: Tremolo / Phaser
Post by: Haberdasher on May 13, 2010, 07:53:56 AM
Right on. Thanks for the suggestion on the Maestro. I do want to add a good phaser, but I've only built the 45, personally. Or, maybe I'll just design one.  ;)


Check out the "Fleetwood Mac" sound from 2:00 onwards.  LUSHHHH.

Holy carp, I've never seen that Maestro pedal before.  That is bad-to-the-bone!  :o
Title: Re: Tremolo / Phaser
Post by: slash555 on May 13, 2010, 10:52:51 AM
maestro definitely!

and some kind of Tremulus lune with lots of mods would be fun. i have one for 3 years and its one of my favorite builds
Title: Re: Tremolo / Phaser
Post by: madbean on May 13, 2010, 11:03:23 AM
Maestro, it is. I'll think about how to implement the rotary knob into a more compact enclosure. Thanks for the suggestion!
Title: Re: Tremolo / Phaser
Post by: jimmybjj on June 25, 2010, 08:28:36 AM
Maestro, it is. I'll think about how to implement the rotary knob into a more compact enclosure. Thanks for the suggestion!

I want one!  ;D
Title: Re: Tremolo / Phaser
Post by: 43jimfear on August 09, 2010, 11:27:43 PM
+1 on Maestro
Title: Re: Tremolo / Phaser
Post by: maysink on August 10, 2010, 02:30:20 PM
I know you've been busy of late but you got a progress report on a phaser board, Brian?
Title: Re: Tremolo / Phaser
Post by: hoyager on September 13, 2010, 05:31:02 PM
+50 for the phaser ! with a really slow minimum setting on the rate. And if it sounded anything like the Mutron Bi-phase or Phasor II...

here's something potentially interesting I just found

"The Mu-Tron Phasor used transconductance op-amps for the variable element at a time when most people were using FETs.

We were aware of most of the effects that were around, but the phase shifter that we were going after was Maestro's PS- I. MXR also came out with the Phase 90 while we were designing the Phasor, but we gave ours two more stages. Then in '74 came the Mu-Tron Bi-Phase, which was actually Newmans idea. We made it with photo mods because we wanted a really wide dynamic range. Though the technology was semi-obsolete-even at that time-the photo mod helped give the Phasor its own sound because photo resistors don't track each other exactly and each has its own particular time constant and subtle form of non-linearity. We even had a special photo mod custom made for us with six photocells in it.

At first the Bi-Phase prototypes sounded too clean, and we didn't know what to do about it. All the FET-based phasers had a non-linearity to them. In audio terms ours was too good, but in musical terms it wasn't good enough. I decided to put a feedback control around the phase-shift loop so that instead of distorting the signal it emphasized the peaks where the phase shifter didn't cancel the signal. This made the sound more interesting without distorting. Our Bi-Phase was the first phaser with a feedback pot, though Electro-Harmonix got a phase shifter to market before us with a feedback switch.

After the Bi-Phase we made the Phaser II, which was one-half of a Bi-Phase with only an oscillator sweep control. That was probably our most-popular product."
Title: Re: Tremolo / Phaser
Post by: B_of_H on September 24, 2010, 01:03:09 PM
a tap tempo controlled trem/phase45 would be really cool.
Title: Re: Tremolo / Phaser
Post by: jkokura on September 24, 2010, 01:29:41 PM
There are tap tempo trems now available, if you'd like I can PM you with more details. Also, the new Taptation circuit can be found at DIYStompboxes and probably can be integrated into a Phaser.

I'm going to be honest though - I really find tap tempo useful with delay and tremolo, I don't see that a phaser would have as much use for tap tempo. It's such a more subtle effect, whereas a flanger as an example, is so much more obvious so to include tap tempo seems more effective. I think having tap tempo phase is kind of like having tap tempo attached to a chorus pedal - not really necessary. Especially because with a Phase 45/90, you can use one of those big knobs, or the rubber covers from dunlop that allow foot control.

Jacob
Title: Re: Tremolo / Phaser
Post by: B_of_H on September 24, 2010, 02:26:35 PM
There are tap tempo trems now available, if you'd like I can PM you with more details. Also, the new Taptation circuit can be found at DIYStompboxes and probably can be integrated into a Phaser.

I'm going to be honest though - I really find tap tempo useful with delay and tremolo, I don't see that a phaser would have as much use for tap tempo. It's such a more subtle effect, whereas a flanger as an example, is so much more obvious so to include tap tempo seems more effective. I think having tap tempo phase is kind of like having tap tempo attached to a chorus pedal - not really necessary. Especially because with a Phase 45/90, you can use one of those big knobs, or the rubber covers from dunlop that allow foot control.

Jacob

yeah I agree but i just built a phase 45 and tremulus lune into a single enclosure and if i get them synched up right it does cool leslie thing.  the amplitude modulation seems to make the swirls more realistic sounding to me but I've just messed around with this a few times.  I need to look into the taptation for sure but so far the info in that thread is a little tough for me to follow. 
Title: Re: Tremolo / Phaser
Post by: madbean on September 29, 2010, 08:05:03 PM
The tremolo is about 90% done. The phaser...well, I'm still wrapping my head around it, but I have all the materials I need to start: schematics, OTA's, a desire to embarrass myself...
Title: Re: Tremolo / Phaser
Post by: JakeFuzz on October 31, 2010, 01:28:39 PM
Check this out.

http://www.electricdruid.net/images/lfo/TapTremolo.gif (http://www.electricdruid.net/images/lfo/TapTremolo.gif)

and the code for the microcontroller

http://www.electricdruid.net/code/TAPLFO2.ASM (http://www.electricdruid.net/code/TAPLFO2.ASM)

you can get PICs programmed by digikey if you send them the code. It is a tremulus lune with the microcontroller controlling the LED/LDR. Looks awesome.
Title: Re: Tremolo / Phaser
Post by: madbean on November 02, 2010, 03:47:20 AM
Jake, that's awesome. Thanks for posting. What does it take to program a PIC? A parallel port, I'm guessing?

I should look into this.
Title: Re: Tremolo / Phaser
Post by: jkokura on November 02, 2010, 10:30:13 AM
Just so you guys are aware, there is a tap tempo tremolo board available using the electric Druid pic. You can buy the very well done tabbed board from Taylor Livingston as well as the micro controller pre programmer from him also. I could post a link, but I didn't think Brian should start working on something that already exists...

Jacob
Title: Re: Tremolo / Phaser
Post by: JakeFuzz on November 02, 2010, 11:19:09 AM
Yeah, I found his site shortly after that article. 

http://musicpcb.com/pcbs/tap-tempo-tremolo/ (http://musicpcb.com/pcbs/tap-tempo-tremolo/)

Sorry, thought it was a good idea. To program a pic you need a programming board, which you can get from Microchip or make yourself. It is really just a socket with a bunch of passive components hooked up to a USB or serial port. The EE guys at school used to do this to make robots and all kinds of crazy stuff, looks pretty easy. The programming part probably wouldn't be too hard either. Microchip sells a pic training kit, with a programming board and a bunch of fundamental exercises. May be worth it, could be very useful in certain effects applications. 
Title: Re: Tremolo / Phaser
Post by: JakeFuzz on November 02, 2010, 11:29:43 AM
http://www.microchipdirect.com/productsearch.aspx?Keywords=DV164120 (http://www.microchipdirect.com/productsearch.aspx?Keywords=DV164120)

Here we go. Hopefully they include a C compiler because that's all I know.
Title: Re: Tremolo / Phaser
Post by: nick on January 25, 2011, 05:52:51 PM
Looking forward to release of a phaser. Need a good one for bass!  ;)