Bit Depth

When I save my wav file, after editing it in Soundbooth, I have to decide
what bit depth to use. 192 seems to be the default, and 320 is maximum (which I assume is 16th power). This will be for a video, and the sound was collected with an off camera Edirol--good, but not professional quality. Suggestions?
kdoc

Thanks Bee Jay
Stephen

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Creative Audigy 2 NX Bit Depth / Sample Rate Prob

This is my first post to this form
Down to business: I recently purchased a Creative Audigy 2 NX sound card. I am using it on my laptop (an HP Pavilion zd 7000, which has plenty of power to support the card.) I installed it according to the instructions on the manual, but I have been having some problems with it. I can't seem to set the bit depth and sample rate settings to their proper values.
The maximum bit depth available from the drop down menu in "Device Control" -> "PCI/USB" tab is 6 bits and the maximum sample rate is 48kHz. I have tried repairing and reinstalling the drivers several times, but it still wont work. The card is connected to my laptop via USB 2.0.
I looked around in the forms and found out that at least one other person has had the same problem but no solution was posted. If anyone knows of a way to resolve this issue I would appreciate the input!
Here are my system specs:
HP Pavilion zd 7000
Intel Pentium 4 3.06 GHz
GB Ram
Windows XP Prof. SP 2
Thnx.
-cmsleimanMessage Edited by cmsleiman on -27-2004 09:38 PM

Well, I am new to high-end sound cards, and I may be misinterpreting the terminology, but the sound card is supposed to be a 24bit/96kHz card.
I am under the impression that one should be able to set the output quality of the card to 24bits of depth and a 96kHz sample rate, despite the speaker setting that one may be using, to decode good quality audio streams (say an audio cd or the dolby digital audio of a dvd movie.) I can currently achieve this only on 2. speaker systems (or when i set the speaker setting of the card to 2.) Otherwise the maximum bit depth/sample rate I can set the card output to is a sample rate of 48kHz and a bit depth of 6bits.
Am I mistaken in thinking that if I am playing a good quality audio stream I should be able to raise the output quality of the card to that which it is advertised and claims to have?
Thnx

Can't import a JPEG: "video bit depth of this file is unsupported"

Re above error message when attempting to import into a Premiere CS6 project. I used Media Info to inspect the file's properties as per below. All of the video in my project is 8bit video. Any help is much appreciated..
Image
Format                                     : JPEG
Width                                        : 1 306 pixels
Height                                       : 979 pixels
Color space                             : YUV
Bit depth                                   : 8 bits
Compression mode                : Lossy
Stream size                              : 2.83 MiB (100%)

Hi Jeff, thanks!!
I guess one cannot import cannot import a CMYK image in Premiere at all.
When I inspected the image in Media Info it ID'd it as a YUV and so I assumed that the imagwe was converted for use in a video that they'd created sometime in the past.
Is there even such a format as YUV for still images? Probably not even though Media Info ID'd it as such.
Anyway, Photoshop ID'd it as CMYK and when converted to RGB that did the trick!
Thanks!

Maximum audio sample rate and bit depth question

Anyone worked out what the maximum sample rates and bit depths AppleTV can output are?
I'm digitising some old LPs and while I suspect I can get away with 48kHz sample rate and 16 bit depth, I'm not sure about 96kHz sample rate or 24bit resolution.
If I import recordings as AIFFs or WAVs to iTunes it shows the recording parameters in iTunes, but my old Yamaha processor which accepts PCM doesn't show the source data values, though I know it can handle 96kHz 24bit from DVD audio.
It takes no more time recording at any available sample rates or bit depths, so I might as well maximise an album's recording quality for archiving to DVD/posterity as I only want to do each LP once!
If AppleTV downsamples however there wouldn't be much point streaming higher rates.
I wonder how many people out there stream uncompressed audio to AppleTV? With external drives which will hold several hundred uncompressed CD albums is there any good reason not to these days when you are playing back via your hi-fi? (I confess most of my music is in MP3 format just because i haven't got round to ripping again uncompressed for AppleTV).
No doubt there'll be a deluge of comments saying that recording LPs at high quality settings is a waste of time, but some of us still prefer the sound of vinyl over CD...
AC

I guess the answer to this question relies on someone having an external digital amp/decoder/processor that can display the source sample rate and bit depth during playback, together with some suitable 'demo' files.
AC

Bit depth of MSI MEGA Stick 511 - 512 Lite, 512MB USB2.0, voice recorder

Hi,
Does anyone know at what bit depth the above, product records at?
It's not in the specs or the manual. I haven't bought one (yet) but I downloaded the manual.
Also, has anyone recorded anything with one of these though the internal or an external mic? Does it sound ok?
thanks,
aengus

sure...
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
Bus 002 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
Bus 001 Device 005: ID 0cf3:3005 Atheros Communications, Inc.
Bus 001 Device 004: ID 0c45:6484 Microdia
Bus 002 Device 003: ID 138a:0011 Validity Sensors, Inc.
Bus 002 Device 004: ID 0bda:0138 Realtek Semiconductor Corp.
Bus 002 Device 005: ID 0fce:2149 Sony Ericsson Mobile Communications AB Xperia X8 (debug)

Maximum Bit Depth /Maximum Render Quality Questions

Maximum Bit Depth
If my project contains high-bit-depth assets generated by high-definition camcorders, I was told to select Maximum Bit Depth because Adobe Premiere Pro uses all the color information in these assets when processing effects or generating preview files. I'm capturing HDV using the Matrox RTX-2 Hardware in Matrox AVI format.
When I finally export my project using Adobe Media Encoder CS4, will selecting Maximum Bit Depth provide better color resolution once I post to Blu-ray format?
Maximum Render Quality
I was told that by using Maximum Render Quality, I maintain sharp detail when scaling from large formats to smaller formats, or from high-definition to standard-definition formats as well as maximizes the quality of motion in rendered clips and sequences. It also renders moving assets more sharply. It's my understanding that at maximum quality, rendering takes more time, and uses more RAM than at the default normal quality. I'm running Vista 64 Bit with 8 GIGs of RAM so I'm hoping to take advantage of this feature.
Will this also help to improve better resolution when I finally export my project using Adobe Media Encoder CS4 and post to Blu-ray format?
Does it look like I have the specs to handle Maximum Bit Depth and Maximum Render Quality when creating a new HDV project with the support of the Matrox RTX 2 Hardware capturing in Matrox AVI format? See Below Specs.
System Specs
Case: Coolmaster-830
Op System: Vista Ultima 64 Bit
Edit Suite: Adobe Creative Suite 4 Production Premium Line Upgrade
Adobe Premiere Pro CS 4.0.1 update before installing RT.X2 Card and 4.0 tools
Performed updates on all Adobe Production Premium Products as of 03/01/2009
Matrox RTX2 4.0 Tools
Main Display: Dell 3007 30"
DVI Monitor: Dell 2408WFP 24"
MB: ASUS P5E3 Deluxe/WiFi-AP LGA 775 Intel X38
Display Card: SAPPHIRE Radeon HD 4870 512MB GDDR5 Toxic ver.
PS: Corsair|CMPSU-1000HX 1000W
CPU: INTEL Quad Core Q9650 3G
MEM: 2Gx4|Corsair TW3X4G1333C9DHXR DDR3 (8 Gigs Total)
1 Sys Drive: Seagate Barracuda 7200.11 500GB 7200 RPM 32MB
Cache SATA 3.0Gb/s
2 Raid 0: Seagate Barracuda 7200.11 500GB 7200 RPM 32MB Cache SATA 3.0Gb/s Using Intel's integrared Raid Controller on MB

Just some details that i find useful on maximum render depth
You really need it even with 8bit source files, when using heavy grading/multiple curves/vignettes. If after grading you see banding, go to sequence > sequence settings from the top menu and check "maximum bit depth (ignore the performance popup), then check again your preview (it will change in a second) to see if banding is still present in 32bit mode. If no banding, you must check it when exporting, if banding is still there, change your grading, then uncheck it to continue with editing.
Unfortunately Maximum bit depth exporting is extremely time-consuming, but can really SAVE YOUR DAY when facing artifacts after heavy grading, by completely or almost completely eliminating banding and other unwanted color distortions.
Use it only for either small previews or the really final output.
Best Regards.

Can I change the bit depth on images in pdf files?

I have a lot of pdf files that were scanned in 24 bit colour. I'd like to convert some of them to greyscale or black and white, and reduce the resolution to make them smaller.
I can see how to reduce the resolution with Save As Other/Optimized PDF, but there are no options there to reduce bit depth. Is there any way to do this?

Thanks, I think I've worked out how to use them. I found a fixup called "Convert color to B/W", but it seems to convert to greyscale, not black and white.
I found this page describing how to convert to both greyscale and monochrome. It says the only way to do monochrome is to convert to tiff first:
http://blogs.adobe.com/acrolaw/2009/10/converting-color-pdf-to-greyscale-pdf-an-update/
If that's the case then Acrobat Pro isn't going to help me, but that was written in 2009. Does anyone know if true black and white conversion has been made available since then?

Final cut pro millions of colours + bit depth question

Hello
I am working in final cut pro 7 and I wanted to know what is the maximum bit depth I can export using the Prores codec? All I see in compression settings for rendering my timeline when wanting to render with Prores 4444 is the option for 'millions of colors' and 'millions of colors +' I was under the impression that millions of colors refered to 8 bit... does the alpha channel mean I can get 10 bit? can the alpha channel hold 2 more bits per channel or something? Or is there no way I can export a 10bit file using the Prores codec within fcp7..? is it all just 8bit. -and when I select 422HQ there is no advanced options for millions of colors..what does this mean? is the only way to get 10bit out of fcp7 to render with the 10bit uncompressed codec? and if so can I render the timeline in prores while im working with it then delete all the renders and change the render codec to 10bit uncompressed, will this now be properly giving me 10bit from the original 4444 12 bit files i imported in the beginning..?
Any help is much appreciated

ProRes is 10-bit. Every ProRes codec is 10-bit...LT, 422, HQ. Not one of them is 8-bit. Except for ProRes 444...that's 12 bit.

PS-CC 2014 (latest) - changing 32-bit depth file to 16-bit

I opened a file, happened to be 32-bit depth (I don't have too many, not even sure how that one got to be 32-bit), and because a lot of filters don't work with that, I changed it to 16-bit, but when I did that, the HDR toning dialogue appeared, and I HAD to click OK on it to get the image to convert to 16-bit (CANCEL on the dialogue leaves it at 32-bit). So you have to choose a METHOD that you can set so there's no change to the image. Weird & wrong . . .

Sorry, no solution to the problem, but a confirmation. I do have the same problem (Intuos Pro and Pen & Touch) showing the problem with ACR 8.5 and Photoshop (2014, CC and 6, these were updated with ACR 8.5) . No such problem before ACR 8.5 and no problem with LR 5.5 (also containing ACR 8.5).
I hope there will be a solution from Adobe soon, since sems to be caused by the ACR update.
Windows 8.1 in my case and latest Wacom Intuos driver installed.
Thomas

Audio bit depth settings?

Hi Everyone,
I have used AME for video, but now I have audio files that have to go through it. I am taking a audio format and making a preset for it to become a .mp3. I can see that I can only set the kbps. The kHz sampling rate of 44.1 is fine, but I need to set bit depth to either 16 or 24. I have looked everywhere and can't find a setting for bit depth for just audio. Am I missing a setting?
I get the feeling that AME was made for video, but not for pure audio...is that the case? When I have used it for video I had a ton of options, but for video very few.
Thanks so much!
Laurie

Your (constructive) comments are accepted here but if you are trying to get Apple's ear about feature requests, use the feedback link http://www.apple.com/feedback/itunes.html
One comment, the Import options are ALSO for converting between formats within iTunes so, while you cannot convert TO a 24 bit WAV, you can convert FROM a song encoded in 24 bit to a more iPod friendly format.

Bit depth question

Hello,
My audio device can sample up to 24-bit. When I create a 32-bit file in Audition 2.0 and record material using the audio device, Audition tells me the file is 32-bit, and it is indeed twice the size of an equivalent 16-bit file. But is it really a 32-bit file, and could there be any issues with the file? It seems fine in every way.
Thank you.

No audio hardware actually samples at greater than 24-bit, because there's absolutely no point - even 24-bit depth isn't actually usable in full; a system like this could in theory digitise a noise floor way lower than can be physically achieved by any mic and preamp system available - you'd need at least liquid nitrogen cooling of all the components before you even started to look at the rest of the problems!
So why does Audition record in 32-bit? Well, 32-bit Floating Point digitising is a bit different. The actual 24-bit signal is recorded quite faithfully (although not quite in the form of an integer signal) and the other 8 bits are essentially left as zeros during recording. What they actually are is scaling bits. And this comes in seriously useful when processing. What it means is that your original signal can be scaled up and down without loss. In an integer engine, if you decided to throw away 30dB of a signal, saved the result and reopened the file and amplified it again, you'd find that your 24-bit signal was effectively 19-bit. In Audition, if you did exactly the same thing with a 32-bit Floating Point signal, you wouldn't lose any bit depth at all. No it's not magic - it's just the effect of storing the original data in a form that inherenently doesn't get modified when an amplitude change is asked for - it's only the scaling system that does, and this doesn't contain audio data.
So yes it's a real 32-bit signal - but not all of those 32 bits are used until you do some processing.

Bit Depth & Sample Rate: 24 bit 96kHz? 192kHz?

I am using the Apogee Duet for Mac and iOS on my Mac and I love it - I'm thinking about getting an iPad for mobile recording (voice overs, mostly) and I wonder if Garage Band can manage 24 bit audio at 96 kHz or 192 kHz? I know that the Auria app can, so if nothing else I can just buy that, but since all I would use the iPad for is Voice Overs to edit later in a computer, a $50 app feels like overkill. Comments? Thoughts? Specs?

Well, I am new to high-end sound cards, and I may be misinterpreting the terminology, but the sound card is supposed to be a 24bit/96kHz card.
I am under the impression that one should be able to set the output quality of the card to 24bits of depth and a 96kHz sample rate, despite the speaker setting that one may be using, to decode good quality audio streams (say an audio cd or the dolby digital audio of a dvd movie.) I can currently achieve this only on 2. speaker systems (or when i set the speaker setting of the card to 2.) Otherwise the maximum bit depth/sample rate I can set the card output to is a sample rate of 48kHz and a bit depth of 6bits.
Am I mistaken in thinking that if I am playing a good quality audio stream I should be able to raise the output quality of the card to that which it is advertised and claims to have?
Thnx

Reduce bit depth or convert color profile first? (best practices question)

For making final deliverable files from working files, is it best to convert to a new color profile before reducing bit depth? Or vise versa?
Our working files are 16 bit with the ProPhoto color space. Our deliverable files are 8 bit AdobeRGB tiffs and sRGB jpegs. We convert using relative colorimetric with black point compensation. Does it make a difference which order these changes are made in?
Thanks in advance for your help!

A profile conversion recalculates RGB values, so yes, it should be done in 16 bit depth.

PSD keeps saving image as 32 bit depth (not 24)

I may be using some incorrect terminology/calculations.
I have some third-party presentation software that requires all images be 8-bit. So I used Photoshop for all photo editing and made sure my PSDs were 8-bit before exporting stills (PNGs) for my presentation. 50+ PNGs were successfully created this way, but i'm having problems with a single file. When I open the correct files in Windwos Pic/Fax View, right click, show properties, go to Summery (advanaced), all the correct files have a bit depth listed as 24.
My problematic PSD says it's in 8-bit, but the PNGs that I create from it are consistently listed as having 32 bit depth in Windows Pic/Fax View. As a test I exported other images formats (TIFFs, JPEGs, etc...) and they all came out as 32 bit depth. How do I fix this? I tried opening the PSD, saving as different name, switching to 16-bit and then back to 8-bit, still didn't work.

I don't think I have an alpha channel. The workflow to create this image is identical to all other images (none of them have alphas). Any way I can check whether an alpha inadvertently was included?
Thanks for also explaining the math behind 8 bit -> 24 bit lol.

Multiple layers in 32 bit depth PSD

Hi there,
Am I missing something, or can't I have multiple layers in a PSD file when working in 32 bit mode? (In particular, I am using CS5).
I am working on a feature to save image data to PSD and would, if possible, prefer to be able to store the individual layers in 32 bit depth.
Thank you in advance

Hi layeredtargets,
You should be able to have and save layered files in documents that are 32 bits/channel in cs5.
If the documents are over a certain size then you would have to save as a .psb file and some
things like certain adjustment layers and filters are not available in the 32 bits/channel mode.
Are you trying to put the individual layers into separate files?

Why only 10-bit depth dng files from 16-bit Nikon D90 nef files?

When I convert 16-bit .nef files from my Nikon D90 to DNG I get only 10-bits depth.
Since the camera should be producing 12-bit depth it seems I am losing information in the conversion, and I don't want that.
I have installed the 7.1 DNG converter, and I suppose that is what is used when I download from camera memory card through Bridge 5.1 and click dng conversion.
Same thing if I open the .nef in Photoshop 5.1 , which kicks up CameraRaw converter 6.7.0.339.
Why is this?
Can't .dng have more than 10-bit depth?
Sverk

Well, according to the user manual and to the review in
http://www.imaging-resource.com/PRODS/D90/D90A.HTM
the D90 delivers 12-bit color depth in the .NEF files.
Of course, I haven't looked at the actual pixel data to find out how finely graded they are.
What I'm looking at is what Bridge 5.1 (WindowsXP) says about the files in the
Metadata/ Bit depth entry.
In that, the .NEF files are listed as "16-bit" depth (although it will actually hold only 12-bit resolution), but when converted to .DNG it says only "10-bit",
and that holds both when the conversion is done automatically during the importing from the camera, and when converting from .nef files afterwards.
Archiving pictures in the .dng format seems to be a good idea -- but only if no information is lost in the conversion.
Thus, the "10-bit" info showing in Bridge worries me.
Might it be that the meaning of bit depth is different in the two file formats?
Might there be something about the de-mosaicing that necessarily consumes two bits of depth? Whether in the .dng conversion -- or when saved .nef files are later to be used?
In other words, for practical purposes, are the formats equivalent in color resolution,
Or is there indeed a certain loss?
Maybe a very difficult question, but I'd sure want to have a technical ly definite answer before I dare switch to using the .DNG format all the way.
Sverk

Bit Depth

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