Stereo Tool
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Stereo Tool 6.10
https://forums.stereotool.com/viewtopic.php?t=3065		 Page 152 of 213
Author:  VFR750A45 [ Fri Aug 26, 2011 12:36 am ]
Post subject:  Re: Stereo Tool 6.10
Quote:
Radio LINK ?
That is another poteontional problem...
yes the transmetter is around 4km, a professionnal radio link for passed the MPX Signal
Author:  Bojcha [ Fri Aug 26, 2011 12:47 am ]
Post subject:  Re: Stereo Tool 6.10
Try this: http://www2.zippyshare.com/v/93919626/file.html
Author:  VFR750A45 [ Fri Aug 26, 2011 12:49 am ]
Post subject:  Re: Stereo Tool 6.10
Quote:
Try this: http://www2.zippyshare.com/v/93919626/file.html
ok now
Author:  hvz [ Fri Aug 26, 2011 12:50 am ]
Post subject:  Re: Stereo Tool 6.10
A simple cable can also cause a lot of tilt issues. I've noticed that just adding a 5 meter cable gives clearly noticeable differences in stereo separation. And usually the effect is biggest on bass tones.

The FLAC file appears to be an analog recording of the sound card signal, right? So the peak that's in there is probably caused by the sound card, but it's by far not as big as what you mention, so - assuming that there's no opposite effect in the recording sound card - it must come from the cables.
Author:  VFR750A45 [ Fri Aug 26, 2011 12:54 am ]
Post subject:  Re: Stereo Tool 6.10
Quote:
Try this: http://www2.zippyshare.com/v/93919626/file.html
pira mesured 60 to 80-85 khz

start around 60khz, at 11sec 80 khz
Author:  VFR750A45 [ Fri Aug 26, 2011 12:59 am ]
Post subject:  Re: Stereo Tool 6.10
Maybe the cable...

Yes an analog recording between two Xonar Essence STX
Author:  VFR750A45 [ Fri Aug 26, 2011 1:08 am ]
Post subject:  Re: Stereo Tool 6.10
Can you explain why in beta 79 the overshooot are smaller than beta 104? With the same cable

In the final configuration this computer will be connected to the MPX input of our radio link.
Author:  Luke [ Fri Aug 26, 2011 11:47 am ]
Post subject:  Re: Stereo Tool 6.10
@VFR750A45 make sure that the impedance is correct.
Remember the output must be flat and without as little as possible phase turning


The best thing to do is to create a buffer (x1 amp) so the output will be stay the same in volume but as in the word 'buffered'.
The influence of having a low impedance input of the transmittor (or other device) connected to the output of the audiocard is then highly reduced.
Since we are only talking about max 100KHz a simple opamp will do and preferably it needs to be as close to the audiocard as possible.


As Bojcha says most of the time the Realtek are good ..... but it is what is behind the chip. Like putting a Porsche engine in a 2CV will not get you good results.(except for fun)
I have seen motherboards (and cards) with a 0,1uF capacitor between the output of the chip and the connector, and that is no joke.
Somehow I like to place coax like RG-58 or RG-59 between a soundcard and a transmittor. Shielded properly and very low capacitive since the middlepart is quiet a distance away (and always) from the shielding.
That the coax is 50 or 75 Ohms has nothing to do with the impedance about what we are talking since that relates to electro magnetical impedance.
Author:  hvz [ Fri Aug 26, 2011 12:03 pm ]
Post subject:  Re: Stereo Tool 6.10
VFR750A45: What happens in BETA079 when you do enable adding a DC offset? I'll have to check if this part of the filter is working less good in the new clipper.
Author:  VFR750A45 [ Fri Aug 26, 2011 12:13 pm ]
Post subject:  Re: Stereo Tool 6.10
Quote:
@VFR750A45 make sure that the impedance is correct.
Remember the output must be flat and without as little as possible phase turning


The best thing to do is to create a buffer (x1 amp) so the output will be stay the same in volume but as in the word 'buffered'.
The influence of having a low impedance input of the transmittor (or other device) connected to the output of the audiocard is then highly reduced.
Since we are only talking about max 100KHz a simple opamp will do and preferably it needs to be as close to the audiocard as possible.


As Bojcha says most of the time the Realtek are good ..... but it is what is behind the chip. Like putting a Porsche engine in a 2CV will not get you good results.(except for fun)
I have seen motherboards (and cards) with a 0,1uF capacitor between the output of the chip and the connector, and that is no joke.
Somehow I like to place coax like RG-58 or RG-59 between a soundcard and a transmittor. Shielded properly and very low capacitive since the middlepart is quiet a distance away (and always) from the shielding.
That the coax is 50 or 75 Ohms has nothing to do with the impedance about what we are talking since that relates to electro magnetical impedance.
i have a RG59 cable RCA/BNC i tested it later, it is in 75 Ohms and my soundcard had RCA output, it's ok for the test
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