All times are UTC+02:00




Post new topic  Reply to topic  [ 6 posts ] 
Author Message
 Post subject: sound card
PostPosted: Fri Aug 20, 2010 7:33 am 
User avatar

Joined: Wed Dec 17, 2008 5:19 am
Posts: 41
Hi,guys i would have a problem, my system is windows 7 64 bit! my soundcard is juli@!
I realized that if I use Fm trasmitter(stereo tool) with the option stereo and doing various tests,output is mono,take off the option stereo from (stereo Tool)is the output from my sound card is again stereo.
I did Test with airomate and Breakaway Broadcast Processor and nothing changes!
concluded that my system and my sound card working well only that the stereo tool to exit when is active my sound card magically becomes mono. :evil:
Sorry my englaise :roll:


Top
   
 Post subject: Re: sound card
PostPosted: Fri Aug 20, 2010 8:12 pm 
Site Admin
User avatar

Joined: Mon Mar 17, 2008 1:40 am
Posts: 9468
Hi Salvo,

If you enable stereo encoding, the output will SOUND as mono, because the stereo (difference between left and right channel) data is in the 23-53 kHz range which you cannot hear. And both channels will play the same sound (if you connect it to an FM transmitter, you only need a single channel).

So unless I misunderstood something this behavior is correct.

You're talking about the sound card output, NOT the output when you transmit that output through a (mono) FM transmitter and listen on an FM receiver, right?


If you're using the Winamp plugin and you ARE playing the output through an FM transmitter, you need to use "Direct Sound Card Access" because Winamp doesn't allow changing the sample rate for the output - which means that (for most recordings) the audio above 22 or 24 kHz is filtered out, leaving no stereo info (the stereo pilot tone is still there though, so the FM indicator of the receiver should still indicate stereo reception).


Top
   
 Post subject: Re: sound card
PostPosted: Sat Aug 21, 2010 5:35 am 
User avatar

Joined: Wed Dec 17, 2008 5:19 am
Posts: 41
Hi,thanks for the reply I attached two jpg
i wanted clarify that my trasmitter is mono!the signal stereo on the radio is visible but not the sound,after various test with songs 80's and 70's I found that is mono.
the two photos show the change of my sound card, by test
Image
Image


Top
   
 Post subject: Re: sound card
PostPosted: Sat Aug 21, 2010 10:13 am 
Site Admin
User avatar

Joined: Mon Mar 17, 2008 1:40 am
Posts: 9468
With those settings the sound card output is SUPPOSED to sound mono - if you transmit it through a mono FM transmitter though you should receive a stereo signal on your FM receiver. (That is, if the sound card and transmitter can handle high enough frequencies).

What I don't understand is that with those other 2 programs you hear the output in stereo - are you sure that you've configured them for FM output using stereo encoding?


Top
   
 Post subject: Re: sound card
PostPosted: Sat Aug 21, 2010 11:08 am 
User avatar

Joined: Wed Dec 17, 2008 5:19 am
Posts: 41
Quote:
Hi,thanks for the reply I attached two jpg
i wanted clarify that my trasmitter is mono!the signal stereo on the radio is visible but not the sound,after various test with songs 80's and 70's I found that is mono.
the two photos show the change of my sound card, by test
Image
Image
Hi, yes is all ok! the output
this problem is born with windows 7
one day we find the error what me crazy :evil:
thanks again :)


Top
   
 Post subject: Re: sound card
PostPosted: Sat Aug 21, 2010 12:04 pm 

Joined: Wed Mar 24, 2010 12:45 am
Posts: 35
When you check the box in the top corner to turn on fm transmitter and you check the "encode stereo" box, what will happen is stereotool will generate an MPX (multiplex) signal specifically designed for going directly through an fm transmitters mono input, which will then be heard in stereo on an fm receiver.

It is NOT designed to go through speakers, I've read somewhere that if you do that, you could end up damaging your speaker system (you need to have a program like MPXTOOL to decode it and make it safe for listening/calibrating)

EDIT: argh beaten to it by hvz :mrgreen:


Top
   
Display posts from previous:  Sort by  
Post new topic  Reply to topic  [ 6 posts ] 

All times are UTC+02:00


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  
cron
Powered by phpBB® Forum Software © phpBB Limited