Dave Vader Posted September 24, 2013 Share Posted September 24, 2013 Right, I need to blend my effects and clean signal as I am using fairly tinny synth sounds, and the bottom end drops out a lot, I am already running through a bypass looper (not because of any tone sucking thoughts, but just to save tap dancing while selecting multiple effects on and off) I figured if I make a little box with 2 pots, 2 resistors and 3 jack sockets, I should be able to go from the direct out of my first synth pedal into one side, and the end of the effects chain into the other and happily set the levels for the effected sound with the pots. Will this work, or will there be a massive volume drop between the bypassed signal and the effects loop coming in? Quote Link to comment Share on other sites More sharing options...
paul_5 Posted September 24, 2013 Share Posted September 24, 2013 Mmm, might need a buffer in there to avoid 'loading' the output. Something like this would do it... [URL=http://s1221.photobucket.com/user/paul_510/media/2chan-mixer_zpsad69650f.png.html][IMG]http://i1221.photobucket.com/albums/dd471/paul_510/2chan-mixer_zpsad69650f.png[/IMG][/URL] Might be a little bit more complicated than your initial idea though. Quote Link to comment Share on other sites More sharing options...
paul_5 Posted September 24, 2013 Share Posted September 24, 2013 Also, if you want to use a quieter OPAMP chip then substitute the TL072 for an NE5532; it's pretty much the first upgrade I do to any circuit. Happy days. Quote Link to comment Share on other sites More sharing options...
Dave Vader Posted September 25, 2013 Author Share Posted September 25, 2013 That certainly is a little more complicated. But possible a good idea. I shall try the first stupidly easy one, and then build a buffer when it doesn't work (need to make something like this to go between my wah and my fuzz-face on the guitar board anyway, so should really get on with getting the hang of it) Thanks Paul. Quote Link to comment Share on other sites More sharing options...
paul_5 Posted September 25, 2013 Share Posted September 25, 2013 Need any layouts for a good quality buffer? Try these: http://tagboardeffects.blogspot.co.uk/2012/02/cornish-buffer.html or this one's a bit simpler, but still good: http://tagboardeffects.blogspot.co.uk/2011/04/klon-buffer.html Hope this helps. Quote Link to comment Share on other sites More sharing options...
Dave Vader Posted September 25, 2013 Author Share Posted September 25, 2013 Yet more thanks Paul, need to go buy boards and resistors and things now. This could get interesting. Quote Link to comment Share on other sites More sharing options...
paul_5 Posted September 25, 2013 Share Posted September 25, 2013 If you're new to all of this shizzle then the easiest thing in the world is to pop into Maplins. Don't do this. It's WAY cheaper (by at least 50%) to get your components etc... from this chap. http://doctortweek.co.uk Quote Link to comment Share on other sites More sharing options...
Dave Vader Posted September 26, 2013 Author Share Posted September 26, 2013 I live in the middle of nowhere, it is not the easiest thing in the world to pop into maplins Dr Tweek looks excellent, i shall throw some pennies his way. Quote Link to comment Share on other sites More sharing options...
Sibob Posted September 26, 2013 Share Posted September 26, 2013 [quote name='paul_5' timestamp='1380133718' post='2221375'] If you're new to all of this shizzle then the easiest thing in the world is to pop into Maplins. Don't do this. It's WAY cheaper (by at least 50%) to get your components etc... from this chap. [url="http://doctortweek.co.uk"]http://doctortweek.co.uk[/url] [/quote] +100000 etc Si Quote Link to comment Share on other sites More sharing options...
paul_5 Posted September 26, 2013 Share Posted September 26, 2013 Yup; he can get hold of obsolete transistors and diodes too for added MOJO. Makes a BIG difference... Quote Link to comment Share on other sites More sharing options...
Dave Vader Posted September 27, 2013 Author Share Posted September 27, 2013 Oh, might have to make second fuzzface. out of interest, is it easy enough to add a 9v power supply into my daft mixer to stop all the noise drops and get a simple little thing running on 3 or 4 pots for easy mixing of stuff on pedalboard? Quote Link to comment Share on other sites More sharing options...
Prime_BASS Posted September 27, 2013 Share Posted September 27, 2013 A bit of a faf for me, there are built units that can do this. Why go for passive? My experience with passive stuff is the signal tends to drop considerably, and obviously you can only cut volume with a passive unit. I'm selling ny ls-2 as soon as I get my custom cog pedal. Quote Link to comment Share on other sites More sharing options...
Dave Vader Posted September 27, 2013 Author Share Posted September 27, 2013 [quote name='Prime_BASS' timestamp='1380276752' post='2223083'] A bit of a faf for me, there are built units that can do this. Why go for passive? My experience with passive stuff is the signal tends to drop considerably, and obviously you can only cut volume with a passive unit. I'm selling ny ls-2 as soon as I get my custom cog pedal. [/quote] Cos I am cheap, and skint, and can build a passive box with bits I have lying about. LS-2 is £80, a wee bit less than the Electric bill i am currently selling stuff off to pay for, and similar to the MOT costs I have to pay for next week, and will then have to find stuff to pay for. Life is a pain... effects should be easier. Quote Link to comment Share on other sites More sharing options...
rmorris Posted September 27, 2013 Share Posted September 27, 2013 If you're going to use an op amp buffer then you might as well build your own op amp mixer as the parts list will be virtually the same and you'll avoid all the issues that arise out of passive mixing - output loading etc. On op amps do be aware that as good as NE5534s are they do run quite hot. Might want to look at alternatives like OPA134(Texas Instruments) amongst many. Good Luck. Quote Link to comment Share on other sites More sharing options...
Prime_BASS Posted September 27, 2013 Share Posted September 27, 2013 [quote name='Dave Vader' timestamp='1380278662' post='2223124'] Cos I am cheap, and skint, and can build a passive box with bits I have lying about. LS-2 is £80, a wee bit less than the Electric bill i am currently selling stuff off to pay for, and similar to the MOT costs I have to pay for next week, and will then have to find stuff to pay for. Life is a pain... effects should be easier. [/quote] man just don't eat for a week or two. that's how I afforded my last bass . Seriously though. I am selling my Ls-2 as soon as the custom turns up which should be Monday, and I'll let it go for £55 or whatever the going rate is. I've tried every passive option going, passive blends, two channel passive mixers etc etc. just because they were cheap, but I could never get anything usable out of them volume or tone wise. I would just suggest that if you could make it active so you can boost each channel(no clue electronics wise lol) it will be a whole lot easier. Quote Link to comment Share on other sites More sharing options...
paul_5 Posted October 2, 2013 Share Posted October 2, 2013 (edited) Just been playing about with a passive option for this. You can get away with using a 1kΩ resistor on the left and right (one per channel to make a 'Y' shape with the resistors) output of the iPod output (to drop the stereo signal into a mono one safely), then just wire the bass output and mono output from your iPod (or similar) together. Nay buffer, nay battery, nay problem. Edited October 2, 2013 by paul_5 Quote Link to comment Share on other sites More sharing options...
Dave Vader Posted October 3, 2013 Author Share Posted October 3, 2013 Now that sounds good, so 2 jack sockets to pots, the resistors joined together into another jack socket and we're all good? is that right? Quote Link to comment Share on other sites More sharing options...
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