Delay self-oscillation auto-kill?

Swimming Bird · #1 10-06-2009, 02:31 PM

Hey all, I was staring at my EHX Deluxe Memory Man yesterday and I realized I cannot think of a single delay pedal with my dream feature: feedback control auto shutoff.

Are there any delays that stop self-oscillating when bypassed?

**Bryan R. Tyler** · #2 10-06-2009, 02:35 PM

Do you mean that will continue to delay but will kill the feedback? Lots of multieffects have that ability- I assume you mean analog or digital pedals though, correct?

lunarpollen · #3 10-06-2009, 02:37 PM

Quote:

Originally Posted by Swimming Bird

Are there any delays that stop self-oscillating when bypassed?

When bypassed? Isn't that another way of saying when turned off? Don't they all stop when you step on the switch to turn them off?

**TheMutt** · #4 10-06-2009, 02:41 PM

The Keeley modded Ibanez AD-9 pedals have been true-bypassed (3pdt stuck onto it), but the original stomp switch can to used as a feedback-oscillation switch when held down, and will stop feedbacking when stepped off.

Or, you could get a bypass loop with a switchable/variable feedback loop such as the Barge Concepts VFB-2.

megadan · #5 10-06-2009, 02:44 PM

I'm not quite sure what you mean. Any pedal without trails will stop oscillating when bypassed. My DM-2, for example.

When you turn it back on, obviously some pedals are going to start oscillating again, because you haven't changed the controls. Does that make sense?

You could also just reach down and twist the 'repeats' knob back a bit, or do it with your foot.

Swimming Bird · #6 10-06-2009, 03:03 PM

Ah, I'm mainly talking analogue. When I bypass my DMM it keeps self-oscillating. That is, the overload light comes on eventually and when I hit the stomp again, the oscillation kicks is where it would be had I not bypassed the effect at all. I can bypass the delay, but it's never actually off unless I hit the power switch.

I can't use my DD-6 for this because it has trails.

Does the Keeley AD-9 act like a Boss 'warp mode' and just turn feedback up to infinite repeat, or does it actually go into self-oscillation?

What I want is to hit the delay while playing, have it build a noise wall then kill it. Then do it again predictably without having to tweak knobs. You can hear this on the vocals (it's a little subtle) at about 2:18 on Paranoid Android.

irvinz · #7 10-06-2009, 03:24 PM

Quote:

Originally Posted by TheMutt

The Keeley modded Ibanez AD-9 pedals have been true-bypassed (3pdt stuck onto it), but the original stomp switch can to used as a feedback-oscillation switch when held down, and will stop feedbacking when stepped off.

Or, you could get a bypass loop with a switchable/variable feedback loop such as the Barge Concepts VFB-2.

do all of them do that? the keeley ones......

rratajski · #8 10-06-2009, 03:42 PM

I haven't heard of any analog delays that stop oscillating right away. You usually have to let the loop clear. It's just the nature of the beast, as far as I know...and I could be wrong!

nad · #9 10-06-2009, 03:56 PM

Quote:

Originally Posted by Swimming Bird

What I want is to hit the delay while playing, have it build a noise wall then kill it.

I do this all the time with my Malekko 600 Dark. If you turn the pedal back on it is still oscillating away, but the effected signal is killed instantly when bypassed. I'm sure it wouldn't work with the trails output (because, well, DUH), but I never bother with that anyhow.

How funny, I guess since the only analogue delays I've used extensively are the Malekkos, I just assumed all analogue delays would act in such a fashion.

kevteop · #10 10-06-2009, 04:06 PM

Bit O/T, but: I had an old Carlsbro Echo for about a week last summer and the bypass on that thing only bypasses the output. So you switch it on, and you get repeats of whatever you played before you switched it on!

Why would anyone design a pedal to work like that?

**TheMutt** · #11 10-06-2009, 08:08 PM

Quote:

Originally Posted by irvinz

do all of them do that? the keeley ones......

AFAIK yes. I've only played around with the Keeley modded Ibanez AD-9 in person though. Awesome effect. Might be getting one for my geetar board one day.

Swimming Bird · #12 10-07-2009, 03:21 PM

nad, that's exactly what I'm talking about. When I bypass the DMM, the delay signal is killed, but the oscillation is still going. I want for the oscillation to stop as well so I can start fresh when I turn the pedal on again.

I'm considering modding the DMM to do this, but I'm not sure where to start. I suppose I'll find the schematic and figure out some options... anybody try anything like this?

Also, with the AD-9 as inspiration, I may look for a way to add a momentary switch to the feedback control that dimes it when pressed.

Ideas?

rratajski · #13 10-07-2009, 03:24 PM

Spend less time doing this to your DMM and just get a pedal that does what you want!

nad · #14 10-07-2009, 03:35 PM

Quote:

Originally Posted by Swimming Bird

I want for the oscillation to stop as well so I can start fresh when I turn the pedal on again.

In my experience, when you turn the oscillating pedal back on, the oscillation is still going. Nothing clears unless you turn the knobs down. This is how it works with my Malekko and Mad Professor (digital) anyhow. The Guyatone pedals might clear their memory though, I think...? Might be worth looking into. I just sold mine otherwise I'd check.

Anyhow. It sounds like you should get the Keeley AD-9. It really is amazing.