what you can try is to check with an Ohmmeter if the box is coonected to the ground tip of the computer power plug. (while it is off and not connected to the power grid)
and if not then use a crocodile clip on the box to connect to the earth plug
also all the audio chain must be powered from the same plug (not only the same phase)
Statistics: Posted by oli_lab — 06 Nov 2015, 19:37
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If you have some small electric chocs when you touch the laptop, the answer could be simple : the outlet (power socket ) you use at home is not grounded, not wired to earth.
Try an other outlet, one you are shure about earth. If the problem persist, maybe it's your AC adapter who have a problem of earth connection.
Regards
Sylvain
Statistics: Posted by SylvainT — 06 Nov 2015, 16:47
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Maybe is my laptop..
Statistics: Posted by Shintylla — 06 Nov 2015, 13:13
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if it does, you can make a special AC adapter that lift the Earth OR make a special USB cable with no ground wire if you're using a usb soundcard.remove your AC adapter. the buzz should disappear.
senso+++
buzz come from ground loop.
the ground wire has its purpose - if any electricity appears on the body connected to the grounding wire, the grounding wire is there for taking this electricity to the ground not to hurt anyone if it is disconnected from the ground electricity stays in these parts which is really not good. In better cases it just damages the equipment in worst case scenario it damages the user.So what to do with this...
1. the whole audio circuit should be connected to socket on the same phase (like on the stagesm lights are connected to different phase as PA, and your equip sould be on the same phase as PA)
2. just in case. use protected power cord splitters/extensions (that with glowing tube). the glowing tube protects the circuit from power peaks and works as filter as well.
3. find better power source for your notebook, soundcard etc. Some power sources are really bad shielded an are causing the hum
4. DI box!
you should have one and regarding the problem,with the buzz. try to connect at least headphones, put the loudness of sound at maximum and use the touchpad. if you'l hear some nois ethat means something is bad with the sielding of the touchpad (some grounding connection is "broken"). there is probability that it induces to audio circuit always (but when you touch the touchpad, there is activity in the touchpad wires, so it appears just when you touch it) and you don't hear it and you will hear it just when your oscillator is playing some special frequency here interference between this frequency and induced signal appears as buzz
Statistics: Posted by drakh — 06 Nov 2015, 10:17
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What kind of noise is this? Does it radiate from your laptop or is it present in the audio signal?
Statistics: Posted by sephult — 05 Nov 2015, 16:33
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What is it? And for your point of view, is something I can explain to Apple technician as a disfunction to be repaired?
Statistics: Posted by Shintylla — 05 Nov 2015, 16:10
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remove your AC adapter. the buzz should disappear.
senso+++
if it does, you can make a special AC adapter that lift the Earth OR make a special USB cable with no ground wire if you're using a usb soundcard.senso+++
buzz come from ground loop.
Statistics: Posted by oli_lab — 05 Nov 2015, 09:37
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it's probably a simple ground buzz as 99% of PC computers.
just a small test: remove your AC adapter. the buzz should disappear.
senso+++
Statistics: Posted by senso — 05 Nov 2015, 08:13
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Thx sephult
Statistics: Posted by Shintylla — 05 Nov 2015, 07:32
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As far touching the touch pad and keys and causing noise that is strange, I'd have to hear. Is it like humming noise? Do any other audio applications do this, like itunes then touching the keys cause noise?
-s
Statistics: Posted by sephult — 04 Nov 2015, 22:05
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thx
Statistics: Posted by Shintylla — 04 Nov 2015, 20:18
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So I Saw what you were using and duplicated....bud dum chhhh.
I did not see the noise at a constant 600MHz using the band-limited.
Using the simple oscillator, yes I saw noise however around -47dB down, yes the bandlimited are much better.
I am not sure what version you are using, but there are bandlimited oscillators that sound much better and have a additional waveforms like triangle, and pink noise.
shintylla's problem is very strange though, sounds like a grounding problem almost.
-s
Statistics: Posted by sephult — 04 Nov 2015, 14:53
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Statistics: Posted by Shintylla — 04 Nov 2015, 13:01
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reaktor osc (saw):
usine osc (saw), same freq.
Statistics: Posted by nik_ost — 04 Nov 2015, 11:15
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Are you using the internal speakers, or an audio soundcard?
Sounds strange.
-s
Statistics: Posted by sephult — 03 Nov 2015, 22:46
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Is this a problem of my laptop?
It happens with and without power supply.
Thx
Statistics: Posted by Shintylla — 03 Nov 2015, 21:31
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