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Bass EQ for Filtered Movies?

jmf

Member
Hello all,
I have been reading a lot about Bass EQ for Filtered Movies and I am trying to see if the concept applies to K material from the store. As I understand it, the theory is that the studios will rolloff of filter the bass tracks as part of post-production. (I don't know why. Perhaps someone here does?) This can sometimes result in the audio track not have the same "punch" you would expect during certain parts of the movie. To adjust for this, there was a community driven effort to create filters to bring these scenes back to life. It started with folks using the miniDSP hardware and applying customer filters in-line with the subs. Ive heard some of the demo clips and the results were indeed impressive. Now some processors can support these filters directly (mine does).

With that said, I noticed most of the filters are created off of the original disc content, which makes sense given the availability and popularity. (Meaning, I didn't expect a lot of these to be built from a K system).

Since the original Bass EQ (BEQ) stuff went somewhat stagnant, there is a very active community at AVS that is now maintaining the titles, the software etc. I asked the following question over there, and I am curious what this group thinks.

1. If the source is a Kaleidescape system which is playing an uncompressed / "original" from the studio file, are the benefits of BEQ still there? The audio quality of the same title from a K system is noticeably improved from streaming, and in many cases, over the disc. One of their selling points is the fact that the audio is left untouched and is full spectrum from the studio.

2. If the above answer is "yes", then I wonder how applying the BEQ file that was built off of a disc or streamed audio source would impact the K audio source. I ask because I read the commentary about being careful on mixing Atmos, DTS-HD, TrueHD sources with the incorrect version of the filter file.
 

Transepoch

Well-known member
Going just from your blurb, I would expect the answer to #1 is probably yes. If the studio clipped the bass in post, then it should still be clipped in the mezzanine file K receives. However, and to #2, I would think the adjustment could be different, as it may have been further curtailed in compressing for disc authoring (or at least there will be more/different data than is present on disc, which might cause the result to be different.)
 

jmf

Member
Going just from your blurb, I would expect the answer to #1 is probably yes. If the studio clipped the bass in post, then it should still be clipped in the mezzanine file K receives. However, and to #2, I would think the adjustment could be different, as it may have been further curtailed in compressing for disc authoring (or at least there will be more/different data than is present on disc, which might cause the result to be different.)

Thank you. That is pretty much what I got from someone over at AVS, he said it would most likely be helpful still since it is the studio who does it in post. Again, I have no idea why this happens, and I am curious.

As for number 2, this person also said yes, it likely *could* be different but if I used the filters based off of the disc version, it is likely the same audio source/track. I think that is the part I am not certain about. We know K in many cases is higher bit count/quality than the disc, but what about the audio?
 
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