What is my sound format?

I'm trying to submit my short through withoutabox and I'm not sure what to put as the audio format. I edited it with all the defaults coming off a minidv and exported it with quicktime conversion.
Here are my choices:
Dolby Digital EX
SepMag/Cardband
Dolby SR
Dolby Digital
OTHER
SILENT
LTRT
Magnetic
Dolby A
DTS
SDDS
Optical
Dolby E
Which one accurately reflects the audio from my film?

It's not anything personal about you, it's just that this is not the first time that I've felt like I'm being scolded like a child for not doing something professionally. Of course I know I should pay attention to what I export, but this was just a temporary export that now has to act as my final (a whole 'nother issue).
I understand, too, that it's hard to judge somebody's skill level from a short post. Coming from your position, I can see how the comment was meant to be a helpful tip to a newcomer, but receiving it as someone who (for the most part) knows what they're doing, it felt extremely condescending. I get where you're coming from, though.
Can't find QT 7 in my utilities, or anywhere else. Does that info (Linear PCM, 16 bit little-endian signed integer, 2 channels, 48000 Hz) tell you anything about the audio format? Even when I tried to export something from FCP as a test to see what the defaults are, I didn't see anything in the list that Withoutabox is giving me. My best guess is "LTRT"--is that just a stereo mix?
Message was edited by: jkldagsjlfdsajlasdfjladsf

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I made a short film and edited through FCPX and am submitting to film festivals through "withoutabox" online.
I am not sure what to put for certain sound formats that they ask.
First, they ask, Mono or Stereo? Not sure which to choose.
And second they ask this:
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rabcor wrote:So you're saying 24 bit has 3x the latency of 32 bit? But 32 bit really is the best right?
No, I meant that if I had to implement 24 bit resolution support for the hardware codec/controller/dsp that already supports 32 bit resolution, I would go for the trade off of 3 times the latency, compared to 32 bit for the sake of simple implementation (I assume some hardware restrictions here, simply filling 24 bit data to 32 bit with zeros would be easier). That however is a comparison of latency (strict delay in this case) between the data being send and processed, so the actual latency difference in audio might not exist at all. This remark has nothing to do with alsa whatsoever.
"The best" is not empirical. What is your setup? Do you know what mass inertia is? Quality is a difficult topic and one has to consider the whole signal path/chain: beginning from the source, through all connections and amplifiers, ending with speakers or headphones. Is 32 bit better then 24 bit? That depends on the circumstances (like emi, elements along the signal path that alter the signal etc.). If you only take resolution in consideration, then yes, since it is more precise representation of the original signal.
Last edited by emeres (2014-07-12 16:01:20)

Sound Formats

As far as I know ALSA supports 4 sound formats, S16_LE, S24_LE and S32_LE and FLOAT_LE
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Last edited by rabcor (2014-07-10 23:44:18)

rabcor wrote:So you're saying 24 bit has 3x the latency of 32 bit? But 32 bit really is the best right?
No, I meant that if I had to implement 24 bit resolution support for the hardware codec/controller/dsp that already supports 32 bit resolution, I would go for the trade off of 3 times the latency, compared to 32 bit for the sake of simple implementation (I assume some hardware restrictions here, simply filling 24 bit data to 32 bit with zeros would be easier). That however is a comparison of latency (strict delay in this case) between the data being send and processed, so the actual latency difference in audio might not exist at all. This remark has nothing to do with alsa whatsoever.
"The best" is not empirical. What is your setup? Do you know what mass inertia is? Quality is a difficult topic and one has to consider the whole signal path/chain: beginning from the source, through all connections and amplifiers, ending with speakers or headphones. Is 32 bit better then 24 bit? That depends on the circumstances (like emi, elements along the signal path that alter the signal etc.). If you only take resolution in consideration, then yes, since it is more precise representation of the original signal.
Last edited by emeres (2014-07-12 16:01:20)

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Can't help with that, if one is using a Windows machine then they are subjected to their rules and control.
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