broken record player effect

[birt]

i want to make an effect that sounds like a record or cd that skips.
it needs a momentary switch so you can keep it repeating a little part wich starts recording the moment you push the switch. and it should have a pot to set the length of the repeated part. kind of like a delay wich only lets you hear the delay and cuts of the guitar signal as long as you keep it repeating.

now how do i start with this? i was thinking about a voice recorder chip but those all seem to use very long recording times. i can't really proigram digital stuff or anything but i hope this isn't to hard to do analog?

[Paul Marossy]

I have no idea how it's done, but I have a Behringer mixer that has a "record effect" built into it. It sounds like that crackle and pop that the old vinyl records used to have. Is that what you're after? I suspect that needs a digital circuit to accomplish that effect. 

[Ashurbanipal]

I would think you could do it with a regular delay pedal by:

disconnecting direct signal from the delay pedal out
have the bypass switch be a momentary switch
split your guitar signal before the delay effect and mix direct back in after, or have the momentary switch add in the delay to the direct signal

Does that get it all?

[Paul Marossy]

I would think you could do it with a regular delay pedal

I don't think so, at least not for the type of record player effect I have heard. It's a regular crackle/pop sound that is superimposed on whatever is playing. It's completely independent from whatever you are playing. It's more like a loop that is playing constantly but can not be changed.

[Ashurbanipal]

I looked to me like he wants the guitar delayed when he clicks the momentary switch.

[Ashurbanipal]

What I suggested would just be a delay that you cut off the "send" to and then it repeats with nothing else going into it. Maybe he wants one of those phrase sampler things. Never tried one. I read an article about making a tape loop and punching in and out of it, but I can't find it again.

[Paul Marossy]

It looked to me like he wants the guitar delayed when he clicks the momentary switch

It sounds like a looper to me. That would be a digital circuit, like a sample and hold kind of thing, right?

[JimRayden]

I would think you could do it with a regular delay pedal

I don't think so, at least not for the type of record player effect I have heard. It's a regular crackle/pop sound that is superimposed on whatever is playing. It's completely independent from whatever you are playing. It's more like a loop that is playing constantly but can not be changed.

You never had any scratched vinyls at home, did you, Paul?

------------
Jimbo

[Paul Marossy]

You never had any scratched vinyls at home, did you, Paul?

Oh yes I did. I grew up on vinyl records in the 70's and early 80s. You'd have to hear what I'm talking about to understand where I am coming from. Oh, I think I got it - he wants it to sound like a scratch when a part would just repeating itself, right? Doh!  Well, that's different than what I was initially thinking. But -  I still say that it's a looper that would do that.

[Ashurbanipal]

Sorry, I keep thinking of stuff. I remember using a normal digital delay once with a mixer to loop a phrase from a singer I think by puching in the send and then out, then the singer could do something else while the phrase delayed repeatedly. So if you could hook up the pedal switch to do that on a delay pedal, it would do the same. One of those phrase sampler gadgets may be more versatile though.

[Paul Marossy]

I'm thinking something more along the lines of a Z. Vex Lo-Fi Junky Looper thing. 

[birt]

so are you guys saying i could mod a delay to do this?

[Ashurbanipal]

I've done it with a delay and a mixer, so in a pedal you would just duplicate puching in and out the send. But if you want record noise in the pedal, I'm not skilled enough to recommend anything. You could mix it in from a sampler or cd. One of those phrase samplers / loopers may let you punch in and out plus loop from beginning to end regardless of the length of time when punching which would be much more versatile, but I haven't looked into it.

[birt]

so i guess what i need is a delay pedal wich can do infinite delay and has a wet-dry pot (or a second out with only delayed signal) and put in a momentary wich cuts off the guitar in and the dry signal so you only hear the delay of the last thing you played before you pushed the momentary.

i think this would do it. any idea what delay could be a good start to mod?

[Processaurus]

For that CD skip sound, I hate to say it on a DIY forum, but the Boss DD-3 has it.  The "Hold" function.  DD-5 too I think.  A delay that uses an analog feedback path would get weird and degraded too quick. 

[Jack]

I sometimes use my digidelay in mode 7 for exactly this.

[trevize]

get an old digitech pds. they're very cheap and good sounding delay/loopers. They can sound very "analog" and they have a loop mode.
i bought a pds 1002 for 16$ on ebay.

i saw also diy lo-fi loopers based on a radio shack voice recorder, if you live in USA (i don't) maybe they would be interesting.

ps:
http://www.instructables.com/ex/i/BAB06A8A161A10299AD7001143E7E506/?ALLSTEPS
here's a looper based on the radio shack chip.