topcat
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Post by topcat on Feb 5, 2010 12:16:06 GMT -5
Yesterday I dug out my RS Sound Level Meter and the AIX disc that Oppo sent to their BDP-83 customers. I adjusted the speaker levels using the top option on the Channel Identification Tests which I believe was the 96KHz/24-bit/7.1 Dolby TrueHD selection. I was able to balance all channels without problems but then I noticed that the second option down was the same except for DTS-HD/MA. When running the test tones under this option I found the levels to be about 3 to 4 db higher than the previous test. Since both Dolby TrueHD and DTS-HD/MA are both viable selections which one should I have used?
I hope all this makes sense (one would probably have to have the AIX disc to understand all of what I said) but I could find no info on the disc to clarify things for me.
Thank you for your responses.
Thomas
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Post by rherrmann on Feb 5, 2010 13:34:40 GMT -5
Maybe you could ask AIX or OPPO?
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topcat
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Post by topcat on Feb 5, 2010 13:37:20 GMT -5
rherrmann, good idea! I was hoping someone in the forum could/would answer this for me though. Thanks just the same.
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Post by mdanderson on Feb 5, 2010 13:54:46 GMT -5
Yesterday I dug out my RS Sound Level Meter and the AIX disc that Oppo sent to their BDP-83 customers. I adjusted the speaker levels using the top option on the Channel Identification Tests which I believe was the 96KHz/24-bit/7.1 Dolby TrueHD selection. I was able to balance all channels without problems but then I noticed that the second option down was the same except for DTS-HD/MA. When running the test tones under this option I found the levels to be about 3 to 4 db higher than the previous test. Since both Dolby TrueHD and DTS-HD/MA are both viable selections which one should I have used? I hope all this makes sense (one would probably have to have the AIX disc to understand all of what I said) but I could find no info on the disc to clarify things for me. Thank you for your responses. Thomas Well I am not sure which one you should use but I really don't think it makes a lot of difference as long as you get the balance right.
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Post by jason1976 on Feb 5, 2010 14:17:29 GMT -5
Well, I don't think you'll get a straight answer there. It is pretty common for DTS and Dolby to have different levels. Sometimes they'll mix a track to give the customer the perception that louder is better.
I would go with the format that you listen to the most of, but as long as the levels are right from speaker to speaker you won't notice much of a difference.
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topcat
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Post by topcat on Feb 5, 2010 14:37:48 GMT -5
Thank you jason for the response. I figured it would be ok to use any of the choices available for the speaker balancing. May be that I should call AIX if they have a number I can find to do so.
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Post by dropzone7 on Feb 5, 2010 16:17:29 GMT -5
Does the UMC-1 not have internal test tones for level calibration? Or is that one of the items broken by firmware right now?
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topcat
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Post by topcat on Feb 5, 2010 16:31:26 GMT -5
Does the UMC-1 not have internal test tones for level calibration? Or is that one of the items broken by firmware right now? The UMC-1 has speaker set-up options included but are needing FW updates. Since I don't have these updates I chose to utilize the AIX disc and the RS sound level meter.
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topcat
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Post by topcat on Feb 5, 2010 16:40:00 GMT -5
Thank you jason for the response. I figured it would be ok to use any of the choices available for the speaker balancing. May be that I should call AIX if they have a number I can find to do so. Follow-up on this brought this response from AIX Records: Hello, I’m not sure why you would be getting different audio levels from the different HD codecs. The same digital files where used as the input to each encoder. But really there is no issue as long as the speaker levels within each test are matched. You used the channel id to balance the speaker levels, but it would be easier to use the speaker balance test on the disc as the tones are longer and easier for your meter to read. The channel id is just to identify that your system’s channel assignment is correct. Dominic Robelotto AIX Records 310-479-0501 2050 Granville Avenue Los Angeles, CA 90025
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Post by mdanderson on Feb 6, 2010 11:37:47 GMT -5
When I use my aix disc, I can't get all the tones to work. I can only get the frt speakers to work with hdmi. If I use the 7.1 analog inputs, then all the test tones will work. I don't know if anyone else has encountered this.
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topcat
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Post by topcat on Feb 6, 2010 11:41:53 GMT -5
When I use my aix disc, I can't get all the tones to work. I can only get the frt speakers to work with hdmi. If I use the 7.1 analog inputs, then all the test tones will work. I don't know if anyone else has encountered this. Since my system is 7.1 I did not try out the other options...sorry. Try sending an e-mail to AIX. They were very quick in responding to me inquiry. Thomas
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Post by mdanderson on Feb 6, 2010 12:06:56 GMT -5
When I use my aix disc, I can't get all the tones to work. I can only get the frt speakers to work with hdmi. If I use the 7.1 analog inputs, then all the test tones will work. I don't know if anyone else has encountered this. Since my system is 7.1 I did not try out the other options...sorry. Try sending an e-mail to AIX. They were very quick in responding to me inquiry. Thomas Thanks Thomas. I may contact AIX.
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