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Sample rates for DVD release
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jrbr85
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19th March 2009
Old 19th March 2009
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Sample rates for DVD release

Hi,

I'm recording and video taping a recital soon, and I have to make both audio CDs and DVDs of the recital. I have separate audio (oktavas) from the camcorder. I'm worried about sample rates though, so here's my question:

I plan to record in 24-bit, 44100Hz. The 44100Hz is for the CD, however after the concert is done I will also master the audio with the video to make a DVD. Will I be able to align the music with the video and put this performance onto a DVD, which uses a 48000 Hz sample rate without any detriment to the audio quality (I have heard that if you don't record in 48000 then sometimes there are "clicks")?
jrbr85
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19th March 2009
Old 19th March 2009
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I just read my original message, and it seems a bit convoluted. More simply put, if I have a recording with a 44.1KHz sample rate, and video with no audio, can I sync up both the audio and video and burn it onto a DVD?
Waltz Mastering
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19th March 2009
Old 19th March 2009
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I think you're going to have to up-sample you're audio to 48 or 96 for dvd.

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Bob Olhsson
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19th March 2009
Old 19th March 2009
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I'd record at 96k. Chances are the DVD is more likely to be played on a quality system than the CD.
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Table Of Tone
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19th March 2009
Old 19th March 2009
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I normally make two or three captures with the same outboard/tape playback settings if I have the feeling there will be a film, video, DVD involved.
44.1/16 bit
48/24 bit
96/24 bit
That way, your covered without any extra sample rate/bit depth conversion, and it will always sound as good as it can!
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19th March 2009
Old 19th March 2009
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Quote:
Originally Posted by jrbr85 View Post
Will I be able to align the music with the video and put this performance onto a DVD, which uses a 48000 Hz sample rate without any detriment to the audio quality (I have heard that if you don't record in 48000 then sometimes there are "clicks")?
Clicks may happen when you transfer and/ or playback with mismatched sampling rates .

Regards,
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20th March 2009
Old 20th March 2009
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It's always better to downsample than upsample. Converting from 44.1KHz to 48KHz is pretty bad, the other way is a little better. 96Khz converted to 48KHz or 44.1KHz yields satisfactory results.
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24th March 2009
Old 24th March 2009
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You'll be just fine going from 44.1 to 48KHz as long as you use a decent SRC.
Voxengo's excellent R8Brain Pro is my SRC of choice.
I would use Minimum Phase mode instead of Linear Phase mode to reduce the chance of a nasty ringing artefact in the high upper mids (Min Phase is the equivalent of hardware DAC/ADC process, and there will be no artefacts at all).
You would do better to record at 48KHz and avoid SRC completely though, but the downside here is your sample libraries might well be at 44.1, meaning they get SRC'd on the fly in your DAW which is definitely the worse of the 2 options.

24/96 on DVD-Video is pointless, as it is optionally supported & stands a high chance of automatic SRC on the fly at output, and also has a (lesser) chance of truncation to 16-bits. All that is actually mandatory on DVD-Video disc is 16/48.
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