Author |
Message |
Ayab
Joined: Oct 27, 2015 Posts: 120 Location: London, UK
|
Posted: Sun Jan 03, 2016 7:47 am Post subject:
Subject description: Karplus Strong Project |
 |
|
CreatorLes
Best wishes for a healthy and happy 2016 (and to all on Electro-Music).
Thank you for your work on such an interesting and creative project. I would really like to experiment with this synthesis method. Do you have any pcb's available or are you planning another run?
I would also be interested in the 'brick'
All the best
Ben |
|
Back to top
|
|
 |
CreatorLes
Joined: Oct 05, 2014 Posts: 84 Location: San Antonio TX USA
|
Posted: Thu Jan 14, 2016 3:18 pm Post subject:
|
 |
|
I've been out of the loop so long i forgot.
Les |
|
Back to top
|
|
 |
masterofstuff124

Joined: Sep 21, 2015 Posts: 23 Location: Miami, Florida
|
Posted: Mon Jun 20, 2016 7:58 am Post subject:
|
 |
|
pcbs? or the most up to date files so i can get the some boards made? |
|
Back to top
|
|
 |
masterofstuff124

Joined: Sep 21, 2015 Posts: 23 Location: Miami, Florida
|
Posted: Tue Jul 26, 2016 9:27 pm Post subject:
|
 |
|
alright built one of these up. any one have any idea what the correct values of r27 and r32 are for 12v power supply? any other necessary changes?
my FBk knob and VCF knob both dont seem to do all that much.
I replaced both r11- 40.2k and r18 49.9k with 47k. and C7 with 2.7n
only 2 2k tempcos for the tranny pairs? I also flipped both of the 2n3906's backwards as mentioned earlier in the thread.
Should I bring all the labelled points on the board to jacks? sum, vol,jls etc...
should feedback send be normalled to fdbk jack? i.e. connected to its switch lug? with attenuator?
different styles of triggers seem to drastically change the tone which is neat!
anyone have any switching ideas for the different kinds of chips?
any other switching ideas. like infinite feedback, or changing out the tone caps in the loops etc...
Lots of questions. I know. really keen on this circuit!@ my first vco so my knowledge is lacking. |
|
Back to top
|
|
 |
AlanP
Joined: Mar 11, 2014 Posts: 550 Location: New Zealand
Audio files: 33
|
Posted: Tue Apr 04, 2017 10:13 pm Post subject:
|
 |
|
Les's Karplus-Strong circuit sounds really, really good!
I had a good fiddle with it today, and the Stim input is vital to getting good sounds out of this circuit. I tried a saw wave into the Stim input, and was getting rather insane sounds, so I googled "karplus-strong synthesis".
Noise is what needs stimulating. Modulated noise. The longer the envelope, the more "breathy" and panpipe-y it sounds.
This is what I worked up from Les's excellent schematic. Didn't have to do any patches due to stupidity on my own part, so that's always a plus. Hopefully Les doesn't mind my putting his name on the front, or E-M!
Thanks for making this circuit public, Les. |
|
Back to top
|
|
 |
BlacKcaT
Joined: Dec 08, 2016 Posts: 25 Location: Italy
Audio files: 1
|
Posted: Wed Apr 05, 2017 4:16 am Post subject:
|
 |
|
nice!
I'm wondering if are still there some pcb to buy... |
|
Back to top
|
|
 |
masterofstuff124

Joined: Sep 21, 2015 Posts: 23 Location: Miami, Florida
|
Posted: Wed Apr 05, 2017 7:11 am Post subject:
|
 |
|
AlanP you need to start selling all your pcb/panel designs. everytime I see one I immediately want it....
i want this....
 |
|
Back to top
|
|
 |
BlacKcaT
Joined: Dec 08, 2016 Posts: 25 Location: Italy
Audio files: 1
|
Posted: Wed Apr 05, 2017 8:10 am Post subject:
|
 |
|
masterofstuff124 wrote: | AlanP you need to start selling all your pcb/panel designs. everytime I see one I immediately want it....
i want this....
 |
this is herorack addiction ! |
|
Back to top
|
|
 |
Inventor
Stream Operator

Joined: Oct 13, 2007 Posts: 6182 Location: San Antonio, Tx, USA
Audio files: 267
|
Posted: Thu Apr 06, 2017 1:18 am Post subject:
|
 |
|
Oh man, I just found this - I feel so joyful to have my name on your version of the KS! This really made my day, and the PCB looks rock solid primo grade A extra fine!
I gotta stress that this was a community project and lots of people helped. Without that help I never could have done it! I even quit it just before it was complete and folks pitched in to carry it to fruition.
Now if you can fabricate it and breathe new life into the project, well, nothing would make me feel better than that (well not much!). Enjoy to the max.
Les
p.s. I'll pay for two built boards with panels if I can afford it, would love to set up a "brick" again as it made IMHO the best sounds I ever made at em. _________________ "Let's make noise for peace." - Kijjaz |
|
Back to top
|
|
 |
mosc
Site Admin

Joined: Jan 31, 2003 Posts: 17897 Location: Allentown, PA
Audio files: 147
G2 patch files: 60
|
Posted: Thu Apr 06, 2017 1:04 pm Post subject:
|
 |
|
Congrats, Alan. I'm almost as happy as Les on this. Putting electro-music.com on your front panel is great too. Splendid work. Got any recordings of this module? _________________ --Howard
my music and other stuff |
|
Back to top
|
|
 |
YashN

Joined: Jun 27, 2011 Posts: 95 Location: Canada
|
Posted: Fri Apr 07, 2017 6:53 am Post subject:
|
 |
|
Looks so neat, well done Alan & Les and others.
How's the faceplate labelling done? |
|
Back to top
|
|
 |
Skrog Productions

Joined: Jan 07, 2009 Posts: 1085 Location: Scottish Borders
Audio files: 134
|
|
Back to top
|
|
 |
AlanP
Joined: Mar 11, 2014 Posts: 550 Location: New Zealand
Audio files: 33
|
Posted: Mon Apr 24, 2017 12:23 am Post subject:
|
 |
|
A quick mess-around shows that this can also be used as a flanger (at least, with the 3207 BBD I currently have in it.)
Signal into Stim, LFO into VCO CV. Turn Feedback to minimum first. Freq is now Manual, VCO CV Level is Depth. Once you've got a good flange-y thing, try adding a bit of feedback. |
|
Back to top
|
|
 |
AlanP
Joined: Mar 11, 2014 Posts: 550 Location: New Zealand
Audio files: 33
|
Posted: Fri Sep 15, 2017 6:55 pm Post subject:
|
 |
|
Did some very quick ear-testing with some modern BBD reproductions from Smallbear, with this circuit.
The Bei-Ling BL3207 sounds very good in this, not much noise, good range with the Freq knob to get a relatively wide range response.
The Coolaudio v3208, on the other hand, sounds dreadful. Noisy. The lowest frequency is higher than the BL3207, and the highest frequency is lower. I have some Coolaudio v3205d chips lying around but, with how noisy they are in a Memory Man clone I have, and how noisy the v3208 was, I decided not to bother perfing up an adaptor board.
I have a suspicion that this has something to do with the relative simplicity of this circuit -- no compander is used, relatively light filtering, meaning that lower quality BBDs don't quite cut it. The good thing is that Smallbear has the Bei Ling chip in decent quantities. |
|
Back to top
|
|
 |
|