Effect like a scratched CD?

[Arno van der Heijden]

Processaurus, can you make some sound samples? I'm really interested! 

[Processaurus]

I'll try, might be a little while because the DSL at my place (where sound sampling can happen) is down.  But it sounds great and robotic.
Gives me an idea for a commercial digital delay that did the hold thing, but crossfaded the loop ends.  You could use it for infinite sustain, hold chords, etc


Man, I want to go further, and lash a wah pedal on there that could be made to jump between the speed ranges, maybe even be in bypass when its in the heel back position.  "Compulsive modding, doc, thats my trouble"

Thats a cool photo you used for your avatar, by the , did you make it?

[Hambo]

GottagetmewannathoseGottagetmewannathosegottagetmewannathosegot.......

Its times like these I wish I wasn't such a skanky pauper, Well Its GOOD to know it will work at least, even if I cant HAVE ONE RIGHT NOW
Hey BTW I found on a site that theres a few different versions of the DD2-3,

http://www.stinkfoot.se/andreas/diy/articles/DD3.htm

So, you're processexellency, you reckon that last one ( the currentest model) would be any harder/easier to work the mod on? mostly surface mount?.. sounds a mare..

BOYERSDAD! I wish there were a few more like you round this way, then I might stand a chance of sorting a half decent band out - instead of the total arsehelmet we're passing off as one at the moment... 

[{ antonio }]

has any one thought about doing a sample hold circuit for this?  just curious.

or you could use the windbond chip recorder set at a set repeat rate . . . .http://www.winbond-usa.com/mambo/content/view/150/280/#ApplicationNotes

[Processaurus]

Hambo, I saw that DD3 versions article, its good you point it out, this hack I'm guessing would be for the early version (as far as parts numbers matching up).  Though maybe the same general idea can work for any version.  I'd guess the surface mount version, particularly the double sided version, would be easier to work on, the DD2 is so dense with the through hole parts and convoluted silkscreen.  Haven't seen a schematic around for the other versions of the 3.  A friend has a more modern DD3, I said I'd put the switch in his because he's been working on using the hold in interesting ways of late, so we'll pop the hood and take a look if the mode switch is set up in a similar way.

Yeah, sad the DD2 and early DD3 are a little spendy even still, and apparently slightly collectable.

Man, I'm obsessed with this CD skipping idea, I was thinking about my tempermental DL4, and if the looper can do extremely short loops, and then building a little external switch that translates a button click to a quick pulse on the record button, and then automatically (the length of the short loop later) pulse the play switch to set the loop...

[Hambo]

I'm really hoping It is possible with the newer type, christ- imagine having to buy one secondhand and having to ask, uhh what type is it? could you just open the back up and tell me... HA!

also would make buying one on ebay a bit hit and miss :/

[Antero]

Oh man, if I can figure out how to do this I'd seriously use it all the time.  I'm having a hard enough time figuring out exactly how it's supposed to work, but is there a general principle that could be applied to any pedal with a hold feature?

[Hambo]

Ok!

I bought me a DD3, it turned ou to be the newest version. I stared in dismay at the circuit board which bears no resemblance to the schematic for the DD-2 booo.

Then I started trying to trace the circuit around a bit and figure out the equivalent workings. It occured to me that the mode select was the same (delay or hold) and the speed was in reverse. The long mode pin does not go anywhere so that is the default for this version of the chip. None of the other pins go anywhere near a diode or in fact, anywhere interesting as far as I could tell.. its not easy because the circuit is double sided with SMT stuff and all that, so it occurs to me that this might be a LOT simpler than even I could have hoped for. indeed.. a simple jumper across the pins of the switch gave the effect I wanted. Its so simple I could have just shat right then.

So the pedal facing away from you, looking down on the pots board, the hold selector has 2 rows of pins thru the board, the top row is the mode selection, the bottom row goes:  1common - 2hold - 3Long(n/c) - 4middle- 5short. simply connect the spdt centre-off switch from before so that the middle goes to pin 2, the outsides go to pins 4 and 5. Job done.

Processaurus thanks, really, I would never have bothered if you hadnt pointed out the original dd2 schem and mod.



As an extra note, I would say that on Short burst is too fast for the effect I was initially after, essentially just connecting an on-off switch between the medium setting would do if thats the effect you wanted, I will probably do both tho. Always better to have more options.

[Processaurus]

Very enterprising!  Thanks for letting us know about your work.   

The problem with this mod is that I always want to fiddle with the switch while the hold is on, because its so cool how it remembers the entirety of the long loop when you're in the shorter modes, and because it halves the time (precisely, I think?).   Oooh, heres an idea for the mechanically inclined, borrowing from the Line 6 tonecore double footswitch idea:  Take out the battery option, and install a second momentary switch in that space to control the time mode setting, that would turn on only when you put a good amount of weight on it, like you do with rubber bumpers on wah pedals, so it takes intent to switch it.

[Hambo]

so you push down, hold mode goes on, you push down harder it flips the switch? interesting but fiddly for people like me with the fisher price tool set 

I was thinking that since the dd3 has that really useful second output on it, would it be possible to convert that to an expression pedal jack, to control the speed, I would just route the mode switch out to a jack also and run a regular single stompswitch in a smaller box, you would have to hold with one foot on the dd3 and switch with the other but well, nice and easy solution.

Do you notice a drop in volume when you stop playing to emphasize this effect at all? I do with the DD3, not a big one, but noticable.

[Hambo]

Actually forget that, just found out  what direct out does 
Plug a jack in there and use the hold function it cuts the guitar signal and just plays the loops, very abrupt, very glitchy. Mmmmmmm

[Arno van der Heijden]

Has anyone made some sound samples already? 

[calculating_infinity]

I will definately try this out as soon as I can debug this damn clicking in my dd-3's delay.  !!!

Thanks!

[Hambo]

http://s144.photobucket.com/albums/r189/Hambo_01/?action=view&current=dd3tish.flv

Hmm dunno if this works should do, but there.. thats me playing around with the noise. Be aware I did it on my Zoom palmtop job that makes everything sound like shite, and you have to wrestle with the manual for 20 hours just to make it stop adding unneccesary amounts of reverb to absolutely bloody everything. I hate that thing. But yeah it gives a general idea.
With a bit of practice it could be more usable I think. the bit at the start is with just a dead jack plugged into direct out, you can kind of blend it in a bit more by not using that and hold-then mute strings.
Interestingly you can store something in the long hold function, switch to short, when you go back any amount of time later to long, it still has what you saved before in there weird

[Processaurus]

Hey, you're better at it than I am!  Sounds cool, makes me wonder how awsome it would be if you saw a band and everyone had one of these pedals and hit them at the same time.

At the end, where you're adding to part of the loop, are you letting up on the switch for an instant to record onto part of the loop?

[ambulancevoice]

BTW, Melt Banana rocks!

@#$% yes!!

[calculating_infinity]

BTW, Melt Banana rocks!

f*ck yes!!

Sorry for the OT but yeah +1!  Melt Banana is great! 

[Hambo]

Hey, you're better at it than I am!  Sounds cool, makes me wonder how awsome it would be if you saw a band and everyone had one of these pedals and hit them at the same time.

At the end, where you're adding to part of the loop, are you letting up on the switch for an instant to record onto part of the loop?

Thats quite a scary thought, but the audience might think it was a bunch of mime artists suffering massive technical difficulties... start throwing stuff 

Yes thats exactly what I was doing, its interesting as you said before, it does seem to go to exactly double speed on the switch between modes, which could be handy.

[calculating_infinity]

Ok so I hacked my DD-3 that had clicky clock noise and well it was really irratating so I went out and bought one off of craigslist and hacked it.  Damn it is fun.  Thanks Hambo for helping me out and thanks Proc for the idea.  I couldn't fit a dpdt in there (for hold on medium and short settings) so I just hacked it hold to medium like Hambo.  Man I always have a problem getting to the guts of Boss pedals.  Everything is so compact I get scared I might rip off a wire and create more work for myself.  The thing that gave me the most trouble was getting that LED back into its hole!  Anyways, this thing is evil!   I stayed up all night playing with it and now i'm paying for it at work.  If you guys come up with anything to add on to this I'd be very interested. 


-Jonathan

[Hambo]

Glad to be of assitance 8bit. I know what your saying about the boss innards, think about procs job with the spagetthi dd2. this dd3 even gave me some trouble coz I was testing around with the circuit all hanging out I had to solder wires to all the ground points and connect them together and the jacks all hanging out was a total mare thehe... the worst part was drilling the hole though, I had a bad experience drilling a distortion pedal a new one once... ended up the drill flung the thing clean across the room smashing all the internal bits.

I'm now looking at getting a really cheap wah to rip up and use as delay time controller for this as mentioned above, I reckon it would be excellent because it would work on the mod and on the regular delay sound too, imagine that, you know how it goes as fast and slowy when you do twist the knob, what you could do with that on a footpedal Ha! plug the jack in the direct out and just get nutty bendy sounds with no dry out. Well We'll see...

Just got to get that wah.. Might take a while, I have a problem paying more than a fiver for something I know I'm going to tear to shreds- Skankbag that I am.