Eurorack & pedal Distortion : Strakal Brulu

Re ziwezhat eo da harz, Pa vez aet ar beg e-barzh

Moderators: Kent, haiku-ish

broon_777
Learning to Wiggle
Posts: 29
Joined: Sat Mar 23, 2013 6:29 pm
Location: Leeds, UK

Post by broon_777 » Sat May 18, 2013 10:15 am

Many thanks for releasing your schematic - I've been trying to figure out best way of converting some of my old Ge fuzzbox schematics to Eurorack for ages and this is really helping.

User avatar
Monobass
thonk.co.uk
Posts: 8756
Joined: Fri May 29, 2009 5:39 pm
Location: Brighton, UK

Post by Monobass » Fri Jun 28, 2013 3:51 pm

I knew I would have to own one of these after Os from Expert Sleepers set up his rig next to me at the last Brighton Modular Meet and cranked his Strakal till it squealed.

I've only spent an hour in total with it so far but its fantastic!
I really like the effect you get with a low input, the way it starves.

Also though it has a lovely thickening effect when used with subtlety, it gave my SynthTech e350 some great rasp.
Thonk - CLICK HERE - Modular Synth DIY + Eurorack Accessories Store

richard
bananaphile
Posts: 7162
Joined: Sat Mar 14, 2009 2:17 am

Post by richard » Wed Aug 07, 2013 4:03 pm

I just got a V2 pedal and I really like it. Thanks for making it. Been lusting for ages!

Is the pedal also okay with modular levels?

What is the safe/effective CV range?

Richard
Bastard Science Vol.1 and 2 (Hordik, Buchla, Serge, EMS, Oberheim) https://soundanatomy.bandcamp.com/album ... ence-vol-1
https://soundanatomy.bandcamp.com/album ... ence-vol-2

Tales from the Voodoo Box (EMS Synthi A solos) https://soundanatomy.bandcamp.com/album ... ynthesiser

Richard Scott - Several Circles https://cuspeditions.bandcamp.com/album ... al-circles

User avatar
haiku-ish
gigwilling with dilsexy
Posts: 757
Joined: Sat Oct 18, 2008 12:58 pm
Location: finisterre

Post by haiku-ish » Wed Aug 07, 2013 4:57 pm

i'm glad you like it !

it is ok to use it with modular levels, and cv control less than 10v
the cv response is not very linear so you don't have to feed it full 0-10v for entire range.

richard
bananaphile
Posts: 7162
Joined: Sat Mar 14, 2009 2:17 am

Post by richard » Thu Aug 08, 2013 9:55 am

thanks


settling in with his new buddies

Image
Bastard Science Vol.1 and 2 (Hordik, Buchla, Serge, EMS, Oberheim) https://soundanatomy.bandcamp.com/album ... ence-vol-1
https://soundanatomy.bandcamp.com/album ... ence-vol-2

Tales from the Voodoo Box (EMS Synthi A solos) https://soundanatomy.bandcamp.com/album ... ynthesiser

Richard Scott - Several Circles https://cuspeditions.bandcamp.com/album ... al-circles

User avatar
haiku-ish
gigwilling with dilsexy
Posts: 757
Joined: Sat Oct 18, 2008 12:58 pm
Location: finisterre

Post by haiku-ish » Thu Aug 08, 2013 10:23 am

nice !
what have you connected into the cv in ?

richard
bananaphile
Posts: 7162
Joined: Sat Mar 14, 2009 2:17 am

Post by richard » Fri Aug 09, 2013 6:08 am

CV output is going from the Blippoo to the Strakal via a mult

this setup actually creates a strange problem: if the CV input is engaged then the mute switch I have between the Blippoo and Strakal audio path doesn't quite work properly. Even when muted the signal still seems to get through to the Strakal? Never had anything quite like that before. Quite odd. It could be that even a very small amount of leak that somehow gets past the mute switch becomes as loud as the unmuted signal. This only happens when the CV input is used.

Unrelated switch question: the bypass switch on the Strakal is so hard and loud that I'm afraid I simply must replace it with a silent one. I assume a switch is a switch is a switch, but is there any specification I need to know before sourcing a more silent replacement? Or could you even point me to one?
Bastard Science Vol.1 and 2 (Hordik, Buchla, Serge, EMS, Oberheim) https://soundanatomy.bandcamp.com/album ... ence-vol-1
https://soundanatomy.bandcamp.com/album ... ence-vol-2

Tales from the Voodoo Box (EMS Synthi A solos) https://soundanatomy.bandcamp.com/album ... ynthesiser

Richard Scott - Several Circles https://cuspeditions.bandcamp.com/album ... al-circles

User avatar
haiku-ish
gigwilling with dilsexy
Posts: 757
Joined: Sat Oct 18, 2008 12:58 pm
Location: finisterre

Post by haiku-ish » Fri Aug 09, 2013 7:45 am

richard wrote: Quite odd. It could be that even a very small amount of leak that somehow gets past the mute switch becomes as loud as the unmuted signal. This only happens when the CV input is used.
Yes really Strange... don't know for now how this can happen

richard wrote:Unrelated switch question: the bypass switch on the Strakal is so hard and loud that I'm afraid I simply must replace it with a silent one. I assume a switch is a switch is a switch, but is there any specification I need to know before sourcing a more silent replacement? Or could you even point me to one?
this is a 3pdt switch wired as true bypass.

richard
bananaphile
Posts: 7162
Joined: Sat Mar 14, 2009 2:17 am

Post by richard » Fri Aug 09, 2013 8:05 am

thanks it seems I need to keep the input level down to below 5%. Strange because I am inputting line levels not modular.

Sounds insane though, I'm sure it is just a matter of finding the exact setting for my setup :tu:
Bastard Science Vol.1 and 2 (Hordik, Buchla, Serge, EMS, Oberheim) https://soundanatomy.bandcamp.com/album ... ence-vol-1
https://soundanatomy.bandcamp.com/album ... ence-vol-2

Tales from the Voodoo Box (EMS Synthi A solos) https://soundanatomy.bandcamp.com/album ... ynthesiser

Richard Scott - Several Circles https://cuspeditions.bandcamp.com/album ... al-circles

richard
bananaphile
Posts: 7162
Joined: Sat Mar 14, 2009 2:17 am

Post by richard » Fri Aug 23, 2013 7:49 am

Report back: I tracked the leakage and noise problems to a bad moulded cable which was turning everything a bit a microphonic. Changed that cable and Everything is sweet here now. :tu:
Bastard Science Vol.1 and 2 (Hordik, Buchla, Serge, EMS, Oberheim) https://soundanatomy.bandcamp.com/album ... ence-vol-1
https://soundanatomy.bandcamp.com/album ... ence-vol-2

Tales from the Voodoo Box (EMS Synthi A solos) https://soundanatomy.bandcamp.com/album ... ynthesiser

Richard Scott - Several Circles https://cuspeditions.bandcamp.com/album ... al-circles

User avatar
haiku-ish
gigwilling with dilsexy
Posts: 757
Joined: Sat Oct 18, 2008 12:58 pm
Location: finisterre

Post by haiku-ish » Fri Aug 23, 2013 10:08 am

cool, thanks for the update !

richard
bananaphile
Posts: 7162
Joined: Sat Mar 14, 2009 2:17 am

Post by richard » Thu Aug 29, 2013 4:15 am

you don't happen to know of a "silent" 3pdt switch do you? This one is really not suiting me
Bastard Science Vol.1 and 2 (Hordik, Buchla, Serge, EMS, Oberheim) https://soundanatomy.bandcamp.com/album ... ence-vol-1
https://soundanatomy.bandcamp.com/album ... ence-vol-2

Tales from the Voodoo Box (EMS Synthi A solos) https://soundanatomy.bandcamp.com/album ... ynthesiser

Richard Scott - Several Circles https://cuspeditions.bandcamp.com/album ... al-circles

User avatar
haiku-ish
gigwilling with dilsexy
Posts: 757
Joined: Sat Oct 18, 2008 12:58 pm
Location: finisterre

Post by haiku-ish » Thu Aug 29, 2013 4:47 am

unfortunately the silent switches i know, are not 3pdt, and use relays or fet for true bypass. But it is possible to change for a silent solution with the expense of an additional circuit.

User avatar
haiku-ish
gigwilling with dilsexy
Posts: 757
Joined: Sat Oct 18, 2008 12:58 pm
Location: finisterre

Post by haiku-ish » Thu Aug 29, 2013 7:42 am

here is an exemple

http://www.muzique.com/news/relay-bypass-revised/
Image
This is a 1″ x 1″ pc board which holds an AVR microprocessor that is controlling a latching DPDT relay. The LED indicator on the pedal is also driven by the micro. The soft-touch momentary switches that are shown several posts below were bought for this project.

You can use the pcb to build a new pedal, or retrofit it into a Boss or Ibanez box to give them true bypass.

User avatar
tonepanic
Common Wiggler
Posts: 122
Joined: Sun Jan 20, 2013 6:20 pm
Location: Austin, TX

Post by tonepanic » Sun Feb 16, 2014 1:37 pm

Just got a Strakal Brulu the other day. This thing has tons of character. Here's a little demo, lots of manual tweaking going on:

[soundcloud url="https://api.soundcloud.com/tracks/135152140" params="auto_play=false&hide_related=false&visual=true" width="100%" height="450" iframe="false" /]

User avatar
haiku-ish
gigwilling with dilsexy
Posts: 757
Joined: Sat Oct 18, 2008 12:58 pm
Location: finisterre

Post by haiku-ish » Sun Feb 16, 2014 3:31 pm

Nice !

and thanks for posting.

User avatar
modestnikov
Learning to Wiggle
Posts: 36
Joined: Sat Sep 12, 2015 10:37 am
Location: Moscow, Russia
Contact:

Post by modestnikov » Sun Jul 31, 2016 4:57 pm

Hello! Guys, I think I have problem
I have drive sound only when Input knob and main knob between 3-6 hours. When knobs at another postion (75%) - nothing happens. Range of distortion is very short ((

User avatar
modestnikov
Learning to Wiggle
Posts: 36
Joined: Sat Sep 12, 2015 10:37 am
Location: Moscow, Russia
Contact:

Post by modestnikov » Sun Jul 31, 2016 5:29 pm

Is it problem? Or is it normal situation?
https://www.dropbox.com/s/sqgk3j8zqaddt ... 8.mp4?dl=0

User avatar
haiku-ish
gigwilling with dilsexy
Posts: 757
Joined: Sat Oct 18, 2008 12:58 pm
Location: finisterre

Post by haiku-ish » Mon Aug 01, 2016 2:07 am

Hi modestnikov !

i think it is pretty normal...
output depends very on what you feed in, and the feedback is touchy too you can have te same setting and the output sounding will be very very different if the input source varies a little in gain...

also , the is a trim on the back, you could check with a multimeter if you have -6V on R1, this biases the transistor and can change a little over time or temperature. this will modify the gain/fuzz/feedback point also and could make the distortion sound grainy or thin

this module is kind of chaotic and even if i matched myself all the transistors every module sounds different from each others

Post Reply

Return to “TouellSkouarn ”