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 Post subject: Re: Realtek ALC Support
PostPosted: Sun Aug 23, 2015 1:31 am 
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Simplest thing you can have is:

- Player (for example Winamp) with Stereo Tool as plugin.
- In Stereo Tool, configure 'FM Sound Card' output to Realtek, and enable pre-emphasis, RDS and stereo coding.

Make sure that the Realtek sample rate is set correctly (4x that of the Winamp input, either 176400 or 192000 Hz). That's it.


Win10 should be fine, but please check which version you get - some will automatically update regularly with no way to even postpone it!


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 Post subject: Re: Realtek ALC Support
PostPosted: Sun Aug 23, 2015 7:00 pm 
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Joined: Wed Aug 20, 2014 9:32 am
Posts: 231
Location: Poland
Quote:
Simplest thing you can have is:

- Player (for example Winamp) with Stereo Tool as plugin.
- In Stereo Tool, configure 'FM Sound Card' output to Realtek, and enable pre-emphasis, RDS and stereo coding.

Make sure that the Realtek sample rate is set correctly (4x that of the Winamp input, either 176400 or 192000 Hz). That's it.


Win10 should be fine, but please check which version you get - some will automatically update regularly with no way to even postpone it!
Furthermore, if you want to confirm the soundcard is sending mpx signal, you can use another machine with 192 kHz input and decode it using line in and mpx tool (or record it using line-in and decode with mpx tool). This part is no biggy ;)
Image

Tricky part is that Realtek = calibrate and usually adjust for tilt


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 Post subject: Re: Realtek ALC Support
PostPosted: Wed Sep 23, 2015 3:17 pm 

Joined: Fri Dec 27, 2013 12:30 am
Posts: 130
And forgive my density again... unfortunately the ST project was derailed when our station suffered a burglary, and naturally they took most of the computers (but not the main automation!). Gone, of course, was the 1 week old Marian.

Is it possible to use a 1/8 stereo output (from computer) to make an MPX signal? Or will I need a better sound card? I suspect the latter.


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 Post subject: Re: Realtek ALC Support
PostPosted: Wed Sep 23, 2015 6:06 pm 
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Posts: 9897
:(
Quote:
Is it possible to use a 1/8 stereo output (from computer) to make an MPX signal? Or will I need a better sound card? I suspect the latter.
Yes, that works. I do it all the time for testing. As said above, you do need to calibrate it - but once that's done it works fine.


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 Post subject: Re: Realtek ALC Support
PostPosted: Thu Sep 24, 2015 4:26 am 

Joined: Fri Dec 27, 2013 12:30 am
Posts: 130
I haven't seen a 1/8" stereo to BNC cable, just mono... ?


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 Post subject: Re: Realtek ALC Support
PostPosted: Thu Sep 24, 2015 1:31 pm 

Joined: Sun Jan 04, 2009 2:54 pm
Posts: 155
Location: Finland
You only need one channel for MPX obviously if you aren't doing anything special. You could even make the cable yourself if you really need to have two BNC connectors at the other end :D


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 Post subject: Re: Realtek ALC Support
PostPosted: Thu Sep 24, 2015 3:26 pm 
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I usually use a minijack to 2x RCA cable, and a plug from RCA to BNC.


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 Post subject: Re: Realtek ALC Support
PostPosted: Fri Sep 25, 2015 3:27 am 
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Joined: Tue Mar 17, 2009 2:56 pm
Posts: 3480
http://puntogee.com/images/atrex/6947532000877.jpg

and

http://ecx.images-amazon.com/images/I/41cNdPbH01L.jpg

_________________
control point


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 Post subject: Re: Realtek ALC Support
PostPosted: Mon Oct 05, 2015 1:59 am 

Joined: Fri Dec 27, 2013 12:30 am
Posts: 130
Guys, I really appreciate you walking me through this. I may try this because I really wanted ST to do all my processing eventually

My engineer had an alternative which was to route the sound via my ST computer but let my FM transmitter produce the MPX signal. I assume though that XLR output isn't enough to use the "full" ST features.


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 Post subject: Re: Realtek ALC Support
PostPosted: Mon Oct 05, 2015 12:08 pm 
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Posts: 9897
Not using MPX from Stereo Tool will generally cost you about 2-3 dB in loudness, mainly in the high frequencies. So, you should really use it!


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