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 Forum index » DIY Hardware and Software » MusicFromOuterSpace.com designs by Ray Wilson
guitar trigger for sound lab
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ultra



Joined: Dec 04, 2006
Posts: 55
Location: oshkosh, wi

PostPosted: Wed Dec 06, 2006 9:27 am    Post subject: guitar trigger for sound lab Reply with quote  Mark this post and the followings unread

hello, i am building the sound lab mini-synth and i am interested in the guitar trigger modification. i would actually like to be able to use any sound, rather than just a guitar. the design of the trigger shows a preamp for the guitar, does this mean that using other sounds (i.e. a microphone already run through a preamp or the output of my sampler) will overdrive the unit? distortion is great but i'd like it to be controllable.
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fonik



Joined: Jun 07, 2006
Posts: 3950
Location: Germany
Audio files: 23

PostPosted: Wed Dec 06, 2006 9:52 am    Post subject: Re: guitar trigger for sound lab Reply with quote  Mark this post and the followings unread

ultra wrote:
distortion is great but i'd like it to be controllable.


the easiest way would be to have a attenuating pot at the input. just wire the input jack socket to the collector of the pot, the emitter to ground and the wiper to the circuit... the only indicator for distortion is your ear then.

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cheers,
matthias
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ultra



Joined: Dec 04, 2006
Posts: 55
Location: oshkosh, wi

PostPosted: Wed Dec 06, 2006 11:50 am    Post subject: Reply with quote  Mark this post and the followings unread

thanks! i'm assuming this means a volume pot? sorry, new to electronics.
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fonik



Joined: Jun 07, 2006
Posts: 3950
Location: Germany
Audio files: 23

PostPosted: Wed Dec 06, 2006 1:05 pm    Post subject: Reply with quote  Mark this post and the followings unread

you may call it volume or gain... Smile

wire it just like the output pot of the SL (see picture).

BTW it don't has to be 100k, 50k will do either...

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cheers,
matthias
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ultra



Joined: Dec 04, 2006
Posts: 55
Location: oshkosh, wi

PostPosted: Wed Dec 06, 2006 1:12 pm    Post subject: Reply with quote  Mark this post and the followings unread

thank you. i'm new to this community and i'm quite impressed with how helpful people are. hopefully someone else can benefit from this post as well, and in the future i may be the one answering questions Smile.
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fonik



Joined: Jun 07, 2006
Posts: 3950
Location: Germany
Audio files: 23

PostPosted: Wed Dec 06, 2006 1:22 pm    Post subject: Reply with quote  Mark this post and the followings unread

you're welcome...
and i am totally with you: very helpful people around here, helped me allot and hey: it's all about give and take without balancing accounts. i love it...

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matthias
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z0rb



Joined: Dec 22, 2006
Posts: 2
Location: New Jersey

PostPosted: Fri Dec 22, 2006 11:17 am    Post subject: Re: guitar trigger for sound lab Reply with quote  Mark this post and the followings unread

fonik wrote:

the easiest way would be to have a attenuating pot at the input. just wire the input jack socket to the collector of the pot, the emitter to ground and the wiper to the circuit... the only indicator for distortion is your ear then.


Would it be better to have the pot go before or after the isolation cap? If after would it work to have the pot go in over R2 and then have the wiper go to the remainder of the circuit?
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blue hell
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Joined: Apr 03, 2004
Posts: 24676
Location: The Netherlands, Enschede
Audio files: 330
G2 patch files: 320

PostPosted: Fri Dec 22, 2006 1:42 pm    Post subject: Re: guitar trigger for sound lab Reply with quote  Mark this post and the followings unread

z0rb wrote:
Would it be better to have the pot go before or after the isolation cap?


Shocked depends on how sensitive you are for panic attacks ...

Usually a cap is placed after a pot Very Happy

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Jan
also .. could someone please turn down the thermostat a bit.
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9 3 4 .. erm .. not 13 then? .. hmm, ah eight! .. yeah yeah as in 8647 .. 47 is an 88 .. pwew .. numbles!
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