Audio Recording Speed

[Alberto Larios-Saavedra]

Does anyone know what the recording "speed" of the older Sony Mini Disc MZ-R50 (and by speed I mean in terms of fps)?

Might shoot some 16mm, telecine, then edit at a computer on Xpress Pro, so how do I sync up audio and video?

 

Thanks,

 

Al

[Sam Wells]

This Q should go on the Sound forum, but the MD recorder doesn't run at any kind of "fps";

for our puroses digital audio recorders run at their sampling rate..

 

 

Sync with slate / clapper is the easy answer.

 

-Sam

[Guest Daniel J. Ashley-Smith]

Like Mr. Wells said it's recorded at a sampling rate.

 

Typically there are 44.1khz (44,100 cycles) a second, sometimes 48khz. Although with DVD's they are now venturing into 96khz recording.

 

So if your running 25fps, your hearing 1764 cycles a frame. (With 44.1khz)

 

Trouble with slow motion scenes is that the audio and video is almost doubled, so you will lose huge amounts of sound quality.

 

I believe the highest possible recording is 192khz. Although I've never actually seen any effects processors run at that rate. So 96khz is the next step.

 

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The main things to look out for in a recorder:

 

Make sure it's DIGITAL for a start.

 

No less than 44.1khz recording.

 

No less that 16bit depth.

 

An output and input that will comply with the equipment your using. (i.e. no good having a microphone with an XLR jack when the recorder uses 1/4 inch, you can get converters but they are un-reliable)

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I have a funny recording set-up. I use my BOSS GT-6 guitar effects processor to model the sound, and make use of the 96khz 24bit S/PDIF connection which runs to a card on my computer.

 

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But yeh the best place for this question is the sound forums.

Edited November 24, 2004 by Daniel J. Ashley-Smith