Hhb Portadat

Thanks for the response Exile. I have a friend who has had some experience with the HHB, and he told me that he would be able to get some great results from it. I was just seeing if other people would concur. Another question: how would I go about recording 24 bit audio? I'm not a sound person as you can tell, but I'd like to know. Thanks.

indianfilmmaker
 
for 24 bit , you need recorder which can record 24 bit
there are some linear and non linear
the cheapest is m-audio microtrack which records 24-48,96
 
This may not be what you want to hear, but in my opinion 24 bit audio for dialogue is not necessicary. If you have the gear to do 24 bit, do it, but don't sweat it of you do not. If you have the DAT record 48/16 use then just convert to 24 bit in post for mixing. If you want to record in 24 bit you pretty much have to use a computer or some sort of solid state or disk recorder.

Your mics, preamps and technique are far more important than 16 vs 24 bit source.
 
Hey thanks tigeba. That doesnt disappoint me at all; it actually makes me feel relieved. I have already rented a Dat recorder, we will be recording in 48/16, and my friend has used it before. I don't understand the concept of converting 16 to 24 in post. Is the process analogous to uprezzing footage? Or is it a format? From what I understand it has to to with sound fidelity and quality. Thanks.

indianfilmmaker
 
indianfilmmaker said:
Thanks for the info. Exile, have you been happy with the HBB?

indianfilmmaker
Click to expand...
it still does commercials when they dont want the non linear
i can say i was more happy then the pd-4 owners during the years :-)
 
indianfilmmaker said:
Hey thanks tigeba. That doesnt disappoint me at all; it actually makes me feel relieved. I have already rented a Dat recorder, we will be recording in 48/16, and my friend has used it before. I don't understand the concept of converting 16 to 24 in post. Is the process analogous to uprezzing footage? Or is it a format? From what I understand it has to to with sound fidelity and quality. Thanks.

indianfilmmaker
Click to expand...

Converting from 16 bit to 24 bit is not a big deal because it is not an uprez type of operation. It is simply increasing the dynamic range (not resolution) of the file. Since there are only 16 bits of resolution in the existing file, the process is essentially just padding your existing data with a bunch of zeros. On the other hand, downconverting a real 24 bit source to 16 bit is not simple, and requires care.

The reason you should not miss the extra dynamic range available in 24 bit recording is because you should not be using it for your dialog capture. Your levels should all be hot.

You should MIX in 24 bit, as this provides numerous advantages in the mixing process.

In audio what you want to minimize is any sort of sample rate conversion (48k to 44.1, etc) and bitrate downconversions.
 
tigeba said:
Converting from 16 bit to 24 bit is not a big deal because it is not an uprez type of operation. It is simply increasing the dynamic range (not resolution) of the file. Since there are only 16 bits of resolution in the existing file, the process is essentially just padding your existing data with a bunch of zeros. On the other hand, downconverting a real 24 bit source to 16 bit is not simple, and requires care.
Click to expand...

The techniques that you describe are padding and truncation. Neither is the most appropriate method for fitting one word length into another. Using proper dither and a MAC operation (multiply and accumulate) will result in a better fit and will avoid excessive additional noise contributions from the process.
 
Thanks for making the whole conversion thing easy to understand tigeba.:thumbsup: Khmuse, could you explain why padding and truncation are not the preferred methods? Thanks.

indianfilmmaker
 
Hello indianfilmmaker,

I can explain why padding and truncation are not the preferred methods, but this would likely require too much information to be conveyed to fit into a reply that I could present in this forum. I have no idea as to your level of understanding of sampled theory nor the specifics of how it applies to digital audio, so it is difficult for me to start a response. This is not intended to be a derogative comment on your knowledge or skills, I simply lack an understanding of your level of knowledge on this subject. Should I just jump into the merits of different spectral distributed dither profiles and their audible (in band) effects, or do I need to start with sample theory and the conversion from time domain to frequency domain? Instead, let my point you to a link which provides a really basic explanation of why any gain change (or refitting any given word length into another) necessitates the use of a dither signal.

http://www.digido.com/portal/pmodule_id=11/pmdmode=fullscreen/pageadder_page_id=27/

If, after reading this you have some additional questions, I will be happy to address them as then we will have a basis for the beginning of a dialog on the subject.
 
"This is not intended to be a derogative comment on your knowledge or skills, I simply lack an understanding of your level of knowledge on this subject."

LOL And I simply lack the capacity to understand anything in your last post. Seriously though, I do have very little experience in sound, hence I'm letting a sound person take care of it. But the info is just for my knowledge, and I appreciate everyone taking their time to fill the large gaps.


I just took a look at the link and it looks like its got gobs of great info. Thanks Khmuse.

indianfilmmaker
 
khmuse said:
The techniques that you describe are padding and truncation. Neither is the most appropriate method for fitting one word length into another. Using proper dither and a MAC operation (multiply and accumulate) will result in a better fit and will avoid excessive additional noise contributions from the process.
Click to expand...

I have never experienced problems with padding. I would never recommend truncation over dithering for downconversion. That being said, I always let my DAW handle the upconversion to 24 bit, so I can't really be 100% sure what method it uses.
 
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