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Author Topic: Loopback and Dolby Encoding DSP Studio Output Format  (Read 1641 times)

GarryWMA

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Loopback and Dolby Encoding DSP Studio Output Format
« on: July 06, 2012, 07:41:24 am »

Hi

I've been very succesfully using Loopback to play Spotify and other material from outside J River MC. Up to now I have been outputting to my Receiver with  5.1 anaogue cabling but I wanted to try using SP/Dif.

Everything is fine if the unconnected internal audio output I use as the source for the loopback is set as Stereo. The audio is then output by J River through my Asus Xonar  optical output as 2 channel PCM.

Where I run into issues is that I have a lot off multichannel source material.

If I want to play this within J River MC I know I can use the Output surround sound in Dolby Digital format option and it works fine but if I set the loopback source to 5.1 channels and try to use dolby encoding  the output is competely broken up.

I also find if I have the loopback source set to 5.1 and set the output in DSP Studio to 2.0 without using Dolby I get a very strange slow motion effect to the sound.

I don't have these issues if I use the 5.1 analogue outputs.

Any thoughts?

Garry
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Matt

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Re: Loopback and Dolby Encoding DSP Studio Output Format
« Reply #1 on: July 06, 2012, 08:57:37 am »

Welcome.

The loopback stuff is a little touchy about buffer sizes since it works in a special low latency mode. 

Does it help if you reduce the buffering in Options > Audio > Output mode settings...?
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Matt Ashland, JRiver Media Center

GarryWMA

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Re: Loopback and Dolby Encoding DSP Studio Output Format
« Reply #2 on: July 06, 2012, 10:07:01 am »

Thanks Matt

Adjusting the buffer size cause the break up to change but not go away.
 
I wouldn't say any one setting is really better than another.

I could imagine that the Dolby Encoding would introduce latency.

Garry
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Matt

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Re: Loopback and Dolby Encoding DSP Studio Output Format
« Reply #3 on: July 06, 2012, 10:13:16 am »

I can reproduce it not working too well when it's encoding to Dolby Digital for output.

For now, I think this is just a limitation of our loopback system.

With that said, I'm hoping to come back to loopback / line-in in the not too distant future and fix the rough edges like this and make the features easier to find and use.
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Matt Ashland, JRiver Media Center

GarryWMA

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Re: Loopback and Dolby Encoding DSP Studio Output Format
« Reply #4 on: July 06, 2012, 10:40:08 am »

That sounds great Matt. I'll look forward to that.

For now its not a game-ender for me as I can work round it.

I have to say it is a great feature in really good product.
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