electro-music.com   Dedicated to experimental electro-acoustic
and electronic music
 
    Front Page  |  Articles  |  Radio
 |  Media  |  Forum  |  Wiki  |  Links  |  Store
Forum with support of Syndicator RSS
 FAQFAQ   CalendarCalendar   SearchSearch   MemberlistMemberlist   UsergroupsUsergroups   LinksLinks
 RegisterRegister   ProfileProfile   Log in to check your private messagesLog in to check your private messages   Log inLog in  Chat RoomChat Room 
 Forum index » DIY Hardware and Software » MusicFromOuterSpace.com designs by Ray Wilson
Almost there...
Post new topic   Reply to topic Moderators: dnny, Uncle Krunkus, v-un-v
Page 1 of 1 [3 Posts]
View unread posts
View new posts in the last week
Mark the topic unread :: View previous topic :: View next topic
Author Message
goodrevdoc



Joined: Sep 11, 2006
Posts: 288
Location: Philadelphia, PA
Audio files: 1

PostPosted: Mon Apr 02, 2007 4:15 pm    Post subject: Almost there... Reply with quote  Mark this post and the followings unread

So, i finally got around to wiring up my SLMS and whoop-dee-do, it sort of works. VCO1=nada. VCO2=awesome. AR Gen=nada. LFO=ok i think. Noise= you got me man. Mixer=ok. VCF= probably VCA=most likely.
Here's the deal. VCO1 will not do anything in any position, period. VCO2 works great apart from the AR switch which leads me to... The AR Gen exists to mock me. And here i thought it was to make nice swells and fades Wink . S1 does nothing when pressed, regardless of the gate or trig positions of S3. The attack and decay pots have no effect either. The LFO works, but without everything else in order I can't completely check it, but it seems to affect VCO2 and the VCF ok. The VCF COF pot does what its supposed to, but the RES pot seems to have no effect. Also there is a sizable volume difference b/w LP and BP, LP being louder. The mixer is fine as far as i can tell. Same with the VCA. The noise generator has really got me though. I socketed Q7 so i could taste test a batch of 2N2712 work-alikes i got from smallbear. Does anyone know the pinout for these? It seems that i get some noise no matter which two legs of the thing i put where. Also, the PWM pot from VCO2 affects the noise. Very strange.
Being that I just fired this up a few minutes ago, haven't had much time to debug. But before i even applied power, wiring and component values were triple checked ok. So really this a just a frustration post before i go get elbow deep in some sound lab debugging. But if anyone got some ideas, i would LOVE to hear them.
thanks,
-justin
Back to top
View user's profile Send private message
goodrevdoc



Joined: Sep 11, 2006
Posts: 288
Location: Philadelphia, PA
Audio files: 1

PostPosted: Tue Apr 03, 2007 2:46 pm    Post subject:
Subject description: A brand new baby soundlab is born!!!
Reply with quote  Mark this post and the followings unread

All is well. The IC for VCO1 was bad, so its swapped out and VCO1 is good to go. The AR Generator had a diode backwards and pin7 on the socket for the CD40106 wasn't making contact.(that's ground) Since i was measuring voltages relative to ground, it kept reading 0V on the top and bottom of the board. Took me awhile to find that one. Shocked Thanks to all who put up with my whining. Next up is mods and V/oct tuning. Anyone have any idea how to go about that? I think i have a clue but some reassurance would be cool.
-justin
Back to top
View user's profile Send private message
sohcahtoa



Joined: Aug 12, 2006
Posts: 55
Location: Fargo, ND

PostPosted: Thu Apr 12, 2007 12:04 pm    Post subject: Reply with quote  Mark this post and the followings unread

If you have a Digital Multimeter or an Oscope you can use it to measure the distance between two octave is one volt, Ray has more on this on his website.
Back to top
View user's profile Send private message
Display posts from previous:   
Post new topic   Reply to topic Moderators: dnny, Uncle Krunkus, v-un-v
Page 1 of 1 [3 Posts]
View unread posts
View new posts in the last week
Mark the topic unread :: View previous topic :: View next topic
 Forum index » DIY Hardware and Software » MusicFromOuterSpace.com designs by Ray Wilson
Jump to:  

You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You can download files in this forum
mps board

Please support our site. If you click through and buy from
our affiliate partners, we earn a small commission.


Forum with support of Syndicator RSS
Powered by phpBB © 2001, 2005 phpBB Group
Copyright © 2003 through 2009 by electro-music.com - Conditions Of Use