Vibrato Circuit

[aziltz]

I'm looking for a vibrato circuit for 2 projects.  One for a standalone pedal and to go on the output of a digital recording chip.  I'm looking for something simplier than the VB-2 circuit.  (the parts are hard to find apparently) although a BBD circuit isnt out of the question, just a simple one is what i need.  On and off, no non-latching.  Anyway, if theres another way to do a nice sounding vibrato without BBD, thats good too. I'm just looking for a basic circuit, and i can't seem to find on. there's enough mod's but no standalone circuits.  So if anyone can help me or point me in the right direction, that be great.

-Austin

[RaceDriver205]

Its possible that a vibrato circuit can not be that simple. I believe that Bad stone phase shifter has a vibrato mode, but I wouldnt call it a 'simple' project. I think there are simple tremolo circuits though, if you want to use that effect instead.

[aziltz]

Tremolo is my backup.  The recorder project is actually for a class that i'm going to adapt eventually into a pedal.  to be a DIY version of the zvex loop junky.  I already have a sweet trem, the voodoo lab. am looking for a real vibrato, i guess it doesnt have to be simple, just have parts that are available.

[mrsage]

I'm tempted to wait until the www.buildyourownclone.com VB-2 is available.

[Unbeliever]

Anyway, if theres another way to do a nice sounding vibrato without BBD, thats good too.

You may not describe it as 'nice', but the straight 'wet' output from any phaser will provide some pitch modulation / vibrato.

[MartyB]

Here's another link:

http://members.shaw.ca/roma/


http://members.shaw.ca/roma/vib.gif


Look near the end of the page.  I haven't personally tried this build.  Also John Hollis' Easyvibe has a vibrato-only setting.  It sounds pretty good to my ear.

[aziltz]

I believe the guy over at diystompboxes.com (paul i think) built that vibrato and said it sounded more like a trem and he couldn't really hear the vibrato.

I think i might check out a basic phaser circuit and remove the direct output, any suggestions where to start?

[cd]

FYI there's a much easier way to do vibrato with a digital recording chip.  You don't need to tack a whole other vibrato circuit to the output.

[bioroids]

Here's another link:

http://members.shaw.ca/roma/
http://members.shaw.ca/roma/vib.gif

This is in fact a tremolo, but a lot of people seems to switch the name of these two effects

Miguel

[aziltz]

the goal of the recording chip project, is to have a vibrato circuit that i can adapt into a standalone pedal.

[Paul Marossy]

Here's another link:

http://members.shaw.ca/roma

I stay away from "Laurier's Handy Dandy Little Circuits" now - nothing I have made from his site has worked for me. 

[The Tone God]

the goal of the recording chip project, is to have a vibrato circuit that i can adapt into a standalone pedal.

The vibrato in the Lofi is a by-product of manipulating the recording IC's operating enviroment. It is not a seperate circuit/effect/function that can be extracted from the circuit.

You will have to look at other options. The unmixed phaser seems like a good starting point.

Andrew

[Processaurus]

theres the holtek digital chip, the HT8950 that small bear stocks, it does vibrato and "robot voice".  The vibrato rate is set to 8Hz, I hear, but you want simple...  if you want more control, an alternative is poaching the circuit out of a cheap chorus pedal (danelectro, behringer, arion, rocktek, DOD).  Cut the dry signal and there's the vibrato.   

Phase vibrato seems to sound better with more stages, like 6 or more.  A phase 45 I made did good phasing, but the vibrato was dreadful and weak.

[aziltz]

What about a simple tremolo using op-amps?  i think i can figure out how to make a LFO sine wave if anyone knows how to make a VCA from op-amps. This circuit is only a small part of a larger project and i need to submit a list of parts tomorrow.

-Austin

[nordine]

why don't try the wobbletron?:

http://www.geocities.com/tpe123/folkurban/fuzz/snippets.html

by any means is a woOoobling vibrato, but it gets present somehow.. it's a nice touch (and the circuit is dead simple)