| Author |
Message |
Coriolis
Joined: Apr 11, 2005
Posts: 616
Location: Stilling, Denmark
|
 Posted: Fri Mar 28, 2008 8:33 am Post subject:
|
  |
|
Yeah the skew is so cool - like a waveshaper and a suboscillator in one... 
C |
|
|
Back to top
|
|
 |
bugbrand
Joined: Nov 27, 2005
Posts: 846
Location: Bristol, UK
Audio files: 1
G2 patch files: 1
|
|
|
Back to top
|
|
|
zthee
Joined: Feb 20, 2008
Posts: 414
Location: Stockholm
|
| Posted: Mon Mar 31, 2008 10:54 pm Post subject:
|
|
|
Thanks guys!
For the frontpanel - http://zthee.vantage.ch/frontpanelen_stor.jpg There's a picture on how the whole modular will look like when it's done..
If I get it done 
And the VCO-1 is driving me mad by not working. Need to dive deeper into it. Though I have to say - It's a very neat circuit! |
|
|
Back to top
|
|
|
fluxmonkey
Joined: Jun 24, 2005
Posts: 708
Location: cleve
|
| Posted: Tue Apr 01, 2008 4:21 am Post subject:
|
|
|
| zthee wrote: | Thanks guys!
For the frontpanel - http://zthee.vantage.ch/frontpanelen_stor.jpg There's a picture on how the whole modular will look like when it's done..
If I get it done
And the VCO-1 is driving me mad by not working. Need to dive deeper into it. Though I have to say - It's a very neat circuit! |
elegant design, and a great module selection, i think you'll have a lot of fun. you may wind up wanting more LFOs, which would be easy by adding some range switches to th VCOs...
nice!
b |
|
|
Back to top
|
|
|
zthee
Joined: Feb 20, 2008
Posts: 414
Location: Stockholm
|
| Posted: Tue Apr 01, 2008 5:04 am Post subject:
|
|
|
The XRVCO has LFO -switch + the PS3100 has a LFO out + the LFO module.. so I've got 4 LFOs from that. Plus I'm planning on using my Korg MS-10 for additional LFO and as a noise source.. Though I'm not really an LFO man - I'm more of a sequencer type
That's why I need atleast 2 CGS sequential switches in my next modular..
It's great that I've already have that plan.. And I haven't even completed the first one yet!  |
|
|
Back to top
|
|
|
widdly
Joined: Jun 25, 2007
Posts: 268
Location: singapore
G2 patch files: 2
|
| Posted: Sun Apr 06, 2008 7:56 pm Post subject:
|
|
|
That's a really nice looking front panel.
I got two VCO1's working based off the PCB art and schematic. They sound great although I wish they had a saw wave. Looks like I'll be adding a converter on a piece of perf.
Last edited by widdly on Thu Aug 05, 2010 10:16 pm; edited 1 time in total |
|
|
Back to top
|
|
|
BOB-SNARE
Joined: Sep 26, 2008
Posts: 30
Location: Australia
|
| Posted: Tue Nov 04, 2008 10:25 pm Post subject:
|
|
|
| Thomas Henry wrote: | With regard to the sync, yes, it's using the FSK capability of the XR chip. But just as important are these two properties:
1. The period of the reset pulse is much more narrow than the period of the dummy second (super high frequency) FSK signal , and
2. The XR chip always starts the alternate FSK signal from wherever the other leaves off. (It's phase continuous).
Put these together, and in effect the output signal is always being reset to some value close to 0. It may not be exactly 0, but it will be consistent from cycle to cycle, and is indistinguishable to the ears.
I've never seen this used before, but that's because I've never seen a chip like the XR which has switchable dual current sources.
Thomas Henry |
I don't understand how the value will be close to 0 each time?
If the frequency is varying of the sync or the VCO, the start of the waveform won't be consistent, surely?
What about using a D-flip-flop with an asynchronous reset (like a 4013), reset by sync pulse (maybe change the NPN inverter to an emitter follower)
and SYNCO (from XR2206) to clk and D connected to +15V with the Q output going to FSKI?
So sync pulse resets FSKI selecting the fast frequency and rising edge of square wave sets FSKI to select the expo-converter.
Based on timing cap of 47nF and TR2 of 1K should give worst case 50us (21Khz) start delay.
Any thoughts?
Cheers. |
|
|
Back to top
|
|
|
Peake
Joined: Jun 29, 2007
Posts: 1113
Location: Loss Angeles
Audio files: 3
|
Posted: Tue Nov 04, 2008 11:22 pm Post subject:
 |
|
|
The VCO-1 has a very nice pulse waveform.
_________________
We are selling emotions, there are no emotions in a grid. -mwagener
"IC 741. Sometimes you don't want fidelity." -Small Bear Electronics Catalog |
|
|
Back to top
|
|
|
toybox
Joined: Aug 03, 2005
Posts: 176
Location: chicago/peru,illinois usa
|
|
|
Back to top
|
|
|
zthee
Joined: Feb 20, 2008
Posts: 414
Location: Stockholm
|
|
|
Back to top
|
|
|
fadeddata
Joined: Dec 27, 2004
Posts: 43
Location: Nashville TN
|
| Posted: Wed Nov 05, 2008 4:05 pm Post subject:
Pretty Panels |
|
|
What is your process for doing panels? Those look great!
-dustin |
|
|
Back to top
|
|
|
toybox
Joined: Aug 03, 2005
Posts: 176
Location: chicago/peru,illinois usa
|
| Posted: Wed Nov 05, 2008 8:34 pm Post subject:
|
|
|
wow beautiful that is some work to defiantly be proud of.gives me some new ideas 
_________________
mY MusIc
http://www.myspace.com/toyboxbastard |
|
|
Back to top
|
|
|
Scott Stites
Janitor
Joined: Dec 23, 2005
Posts: 4127
Location: Mount Hope, KS USA
Audio files: 96
|
| Posted: Wed Nov 05, 2008 8:46 pm Post subject:
|
|
|
I agree - that is one cool lookin' synth.
_________________
My Site |
|
|
Back to top
|
|
|
bugbrand
Joined: Nov 27, 2005
Posts: 846
Location: Bristol, UK
Audio files: 1
G2 patch files: 1
|
|
|
Back to top
|
|
|
johans121
Joined: Jun 19, 2007
Posts: 178
Location: Huntsville, AL (USA)
|
| Posted: Thu Nov 06, 2008 2:11 pm Post subject:
|
|
|
Excellent job!!!!
I hope my homebrew modular (no synthtech or bridechamber panels) looks one quarter as nice as yours when I'm through. I have a feeling I may have to keep mine in a different room than my synthtech & bridechamber panel modular....
-Jim |
|
|
Back to top
|
|
|
|
Forum index » DIY Hardware and Software
FAQ
Calendar
Search
Memberlist
Usergroups
Register
Profile
Log in to check your private messages
Log in
Chat Room
