do you still have the mixin on this x0x
you could take the vco out
and put it into the mix in
and then listen on the mixout
that will buffer the signal before it goes to the soundcard
otherwise try a shorter cable
or going to a mixing board rather than the computer
or try putting a 100k resistor to ground
from the vco out jack tip
Hiss from VCO
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Please be positive and constructive with your questions and comments.
- isak
- Posts: 835
- Joined: Wed May 27, 2009 3:54 pm
Re: Hiss from VCO
actually the VCO out is from the mix in jack, farther on i have 2 mods in that jack.
the first is the VCF CV in, from the tip
the second is the VCO out, from the ring
i cut the trace that goes to pin 3 on J7.
in the begging i was thinking that the VCF mod is doing that somehow and then i checked the mod on other x0x and it was the same so its not the VCF mod.
u want me to do the mod on deferent jack and plug it via the mix in (on a my other x0x)?
the first is the VCF CV in, from the tip
the second is the VCO out, from the ring
i cut the trace that goes to pin 3 on J7.
in the begging i was thinking that the VCF mod is doing that somehow and then i checked the mod on other x0x and it was the same so its not the VCF mod.
u want me to do the mod on deferent jack and plug it via the mix in (on a my other x0x)?
-
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Re: Hiss from VCO
you can probably keep it on the same jack
but try plugging it into the mixin on another x0x
and listen at the mixout of that x0x
but try plugging it into the mixin on another x0x
and listen at the mixout of that x0x
- isak
- Posts: 835
- Joined: Wed May 27, 2009 3:54 pm
Re: Hiss from VCO
ok, i plugged it to the other x0x and it was the same hiss, no change.
-
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Re: Hiss from VCO
how does the square wave sound
does it sound like it should but with added noise
or does it sound distorted
does the volume seem right
does it play the right note
is the jack properly grounded
i think i may be out of suggestions
does it sound like it should but with added noise
or does it sound distorted
does the volume seem right
does it play the right note
is the jack properly grounded
i think i may be out of suggestions
- isak
- Posts: 835
- Joined: Wed May 27, 2009 3:54 pm
Re: Hiss from VCO
it sounds goodhow does the square wave sound
sound like it should but very distorted coz of the very high volume.does it sound like it should but with added noise
or does it sound distorted
very high, same goes the saw wave also distorted, very high volume, but it sound good.does the volume seem right
yesdoes it play the right note
yes, i checked with my multimeter bip tones.is the jack properly grounded
i think i may be out of suggestions
-
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- Joined: Fri Feb 17, 2006 5:35 am
Re: Hiss from VCO
you could try listening through a potentiometer
that way you could knock the signal level down a bit
put a 100k pot at the vco out
one end goes to the signal
the other end goes to ground
and the wiper goes to your mixing board
that way you could knock the signal level down a bit
put a 100k pot at the vco out
one end goes to the signal
the other end goes to ground
and the wiper goes to your mixing board
- isak
- Posts: 835
- Joined: Wed May 27, 2009 3:54 pm
Re: Hiss from VCO
thanks guest, i was thinking adding a pot to the VCO.
Q..
doenst it should be high like that? i mean if i take the VCO and connect it to external VCF or VCA cant i control the volume from there?
Q..
doenst it should be high like that? i mean if i take the VCO and connect it to external VCF or VCA cant i control the volume from there?
-
- Posts: 3155
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Re: Hiss from VCO
it depends upon what your plugging it into
most audio devices take 1v signals or so
the vco outputs 5v signals
which will distort
and maybe even damage the input
most audio devices take 1v signals or so
the vco outputs 5v signals
which will distort
and maybe even damage the input
- isak
- Posts: 835
- Joined: Wed May 27, 2009 3:54 pm
Re: Hiss from VCO
guest,
i just now rememberd that bcbox has this mod and i checked his documants on how he did it.
i didnt understand something here, if "S" goes to (-) of C17 where goes the "T" ? to the (+)?
maybe this will fix the hiss probelm, dont u think?
i just now rememberd that bcbox has this mod and i checked his documants on how he did it.
i didnt understand something here, if "S" goes to (-) of C17 where goes the "T" ? to the (+)?
maybe this will fix the hiss probelm, dont u think?
-
- Posts: 3155
- Joined: Fri Feb 17, 2006 5:35 am
Re: Hiss from VCO
im not sure where T goes
but taking the signal from c17
would be the same as putting in a pot
as it knocks the signal down by 1/100
you will probably need a mixer
to amp the signal before listening to it
but it will definitely sound better from there
but taking the signal from c17
would be the same as putting in a pot
as it knocks the signal down by 1/100
you will probably need a mixer
to amp the signal before listening to it
but it will definitely sound better from there
- isak
- Posts: 835
- Joined: Wed May 27, 2009 3:54 pm
Re: Hiss from VCO
can i take the signal from c17 and leave c17 on board
another Q..
what is the last component of the VCO chain before the getting to the VCF and can i take the signal from this last component?
another Q..
what is the last component of the VCO chain before the getting to the VCF and can i take the signal from this last component?
-
- Posts: 3155
- Joined: Fri Feb 17, 2006 5:35 am
Re: Hiss from VCO
c17 is the last component
it doesnt matter too much which side
you take the signal from
although the (-) side might be a bit better
it doesnt matter too much which side
you take the signal from
although the (-) side might be a bit better
- isak
- Posts: 835
- Joined: Wed May 27, 2009 3:54 pm
Re: Hiss from VCO
and i dont need to use some resistors or something ..?
-
- Posts: 3155
- Joined: Fri Feb 17, 2006 5:35 am
Re: Hiss from VCO
if you wanted to put a 1k between c17 and the output
that might be good to protect the x0x
in case you plug the wrong thing in someday
but it shouldnt be necessary for the sound
that might be good to protect the x0x
in case you plug the wrong thing in someday
but it shouldnt be necessary for the sound
Please be positive and constructive with your questions and comments.