All times are UTC+02:00




Post new topic  Reply to topic  [ 7 posts ] 
Author Message
PostPosted: Mon Jan 05, 2009 6:01 pm 

Joined: Mon Jan 05, 2009 5:41 pm
Posts: 23
Heya

Just gave my boss a demo of stereo tool, basically told me to make it happen
Will be registering tomorrow

in future I would like to look into a sound card that can support 192k and also
pass the audio through from line in to speaker when the computer reboots
Any suggestions, we dont have a budget for m audio :/

We will be replacing some equipment that came off the ark, but it has performed well
Obran optimod tv (8100 i think)

Will keep you up to date how the testing goes tomorrow


Top
   
PostPosted: Thu Jan 08, 2009 9:58 am 

Joined: Mon Jan 05, 2009 5:41 pm
Posts: 23
WOW

thats all i can say

We have been on stereo tool for a day now, and the compliments keep on flying in!

I am currently feeding our aac streaming off the same feed as the transmitter, can i put a second sound card
and enable the aac friendly feed on that output?

PS i have just bought a license - I bought a full FM license even though i am not using those features (yet)
its worth it guys lets keep this project going by supporting it :)


Top
   
PostPosted: Thu Jan 08, 2009 11:42 am 
Site Admin
User avatar

Joined: Mon Mar 17, 2008 1:40 am
Posts: 9764
Great!

By the way, you mention that you are not yet using the FM options yet, but if you have a transmitter I would assume that you are using FM pre-emphasis?

About the 2nd (AAC) stream: What does your current setup loop like? Are you using the stand alone Stereo Tool version or a plugin version?

Here's how to do it with Winamp - you don't need a 2nd sound card:
- Get the LineIn plugin for Winamp ( http://home.hccnet.nl/th.v.d.gronde/dev ... index.html ).
- Select Stereo Tool as DSP plugin
- In Stereo Tool, in the FM settings window select "Normal Output" in "Send to Winamp". Enable "Direct Sound Card Access".
- Then just load an AAC encoder for Winamp. Disable any sound card output in Winamp.

This way you get:
- FM output to the sound card via Direct Sound Card Access.
- Processed de-emphasized output to the AAC encoder.

I will send you the key tonight (I'm not at home right now).


Top
   
PostPosted: Thu Jan 08, 2009 1:23 pm 

Joined: Mon Jan 05, 2009 5:41 pm
Posts: 23
I am running ST standalone on a dedicated pc,
the streaming encoder is on another pc, should i run a seperate copy on the
winamp encoder?

My STL link is currently doing the pre emph and stereo encoding with a external RDS injected on the
sub carrier

i then feed my transmitter a mpx signal at the site with the actual transmitter set to mono as to not
filter out the sub carriers (has its own stereo encoder)


Top
   
PostPosted: Thu Jan 08, 2009 1:24 pm 

Joined: Mon Jan 05, 2009 5:41 pm
Posts: 23
ps you can listen at http://www.bayfm.co.za/node/142 flash player required
its 24kbit aac+


Top
   
PostPosted: Thu Jan 08, 2009 1:55 pm 
Site Admin
User avatar

Joined: Mon Mar 17, 2008 1:40 am
Posts: 9764
Quote:
I am running ST standalone on a dedicated pc, the streaming encoder is on another pc, should i run a seperate copy on the winamp encoder?
What do you mean by "should i run a seperate copy on the winamp encoder"?

You could run both (streaming and broadcasting) on one pc. Assuming that it can handle the load.
Quote:
My STL link is currently doing the pre emph and stereo encoding with a external RDS injected on the
sub carrier
Actually, this shouldn't work... The RDS signal must be matched EXACTLY to the 19 kHz carrier tone of the stereo signal. If you mix a separate RDS signal, that will probably have 2 effects:
1. It disturbs the 19 kHz pilot that is generated by Stereo Tool. This can disturb the stereo sound.
2. The link between the RDS signal and pilot does not match the specification, which can cause bad or no RDS reception.

If possible, you should use the Stereo Tool RDS signal. If that is not possible, but you ARE using the Stereo Tool stereo coder, then your best bet is (if possible) to turn off/disable/remove the pilot tone of the RDS signal. So at the very least it won't disrupt the stereo signal. RDS reception cannot be guarranteed in this case.

Alternatively, if the RDS encoder can "follow" the pilot tone generated by Stereo Tool, that would also be an option (in that case, the Stereo Tool signal would have to be connected as input for the RDS encoder).


Top
   
PostPosted: Thu Jan 08, 2009 3:05 pm 

Joined: Mon Jan 05, 2009 5:41 pm
Posts: 23
Quote:
Quote:
I am running ST standalone on a dedicated pc, the streaming encoder is on another pc, should i run a seperate copy on the winamp encoder?
What do you mean by "should i run a seperate copy on the winamp encoder"?

You could run both (streaming and broadcasting) on one pc. Assuming that it can handle the load.
Quote:
My STL link is currently doing the pre emph and stereo encoding with a external RDS injected on the
sub carrier
Actually, this shouldn't work... The RDS signal must be matched EXACTLY to the 19 kHz carrier tone of the stereo signal. If you mix a separate RDS signal, that will probably have 2 effects:
1. It disturbs the 19 kHz pilot that is generated by Stereo Tool. This can disturb the stereo sound.
2. The link between the RDS signal and pilot does not match the specification, which can cause bad or no RDS reception.

If possible, you should use the Stereo Tool RDS signal. If that is not possible, but you ARE using the Stereo Tool stereo coder, then your best bet is (if possible) to turn off/disable/remove the pilot tone of the RDS signal. So at the very least it won't disrupt the stereo signal. RDS reception cannot be guarranteed in this case.

Alternatively, if the RDS encoder can "follow" the pilot tone generated by Stereo Tool, that would also be an option (in that case, the Stereo Tool signal would have to be connected as input for the RDS encoder).
I am currently not using any of the FM functions of the stereo tool for this reason
My RDS doesnt generate its own pilot, it takes a sample from the STL link and then injects the RDS based
on the STL's pilot tone


Top
   
Display posts from previous:  Sort by  
Post new topic  Reply to topic  [ 7 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