Audio capture sample rate

I have read other posts that deal with the issue audio rate that cause the synch with the picture to be off. I recorded this Dv at sp speed and the camera is a pd 150 that had the audio rate set to 32khz. I haved looked in the settings and there is no 32 khz option and you can't make one by copying the generic template. I remember in version four and prior versions that there was the template for 32khz and now its gone, why? How do you get Final Cut Pro 5 to allow 32khz 2 channel sound?

First, it is better to record at 48k for a lot of reasons. However, go to your capture presets, duplicate the appropriate preset and look at the quicktime audio format options. You should be able to change it to 32k. I can.

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How to render audio with sample rate 48000hz using jmf

hi,
In my application i need to play the audio with jmf player with sampling rate 48000hz. but i found that jmf player plays the audio with sampling rate of 44100hz only.but my application needs to play the audio with sampling rate of 48000hz .please help me how to do this using jmf .
thanks in advance,

hi,
In my application i need to play the audio with jmf player with sampling rate 48000hz. but i found that jmf player plays the audio with sampling rate of 44100hz only.but my application needs to play the audio with sampling rate of 48000hz .please help me how to do this using jmf .
thanks in advance,

Core audio and sample rate conversion

I would like to know how to take manual control over core audio regarding sample rate destruct... er conversion. First - I know the workarounds - simply closing the audio player of choice, resetting the external hardware and relaunching the audio player of choice.
setup:
I run external converters with an external sample rate clock source. No problems or issues here. I keep my music collection segregated by SR (96k, 88.2k, 48k, 44.1k) as I ALWAYS listen through external converters.
The annoyance is when one forgets to keep track of core audio and inadvertently ends up listen to a piece of music sample rate destructed. You know - walk up to music server computer, forget that you had DAC set to 44.1k for last music played, put on 96k source, SRC takes over and you don't notice the artifacts and distortion for a few songs. No one wants that! Don't get me wrong - it's a convenient feature and the amateur user would be sunk without it.
What I want is an indicator that will tell when SRC is turned on and further, what the input and output sample rates are (as far as core audio is able to determine from the hardware anyway). In my world this would have been a check box in a preference setting. Perhaps someone has written a script or app for this? Command line instruction?
Thanks

Start with http://developer.apple.com/documentation/MusicAudio/Conceptual/CoreAudioOverview /Introduction/Introduction.html and direct further queries to the developer forums under OS X Technologies.

Question on supported audio input sampling rate

Hi,
I have USB capture device which supports HDMI input and I wish to use it to connect to my digicam and stream it out with FMLE. While I can see that the video input is working properly, the audio is not working. The error message "Problem with audio capture device - Please verify that the audio device is working correctly and is not already in use." always appear when I try to select the device's audio device. Using the graphedit, I can see that the capture device's audio output pin only supports stereo 16-bit 48 kHz PCM output. As such, can I confirm that that FMLE only support 44.1kHz (as well as other 44.1kHz divisible) sampling rate?
Thanks
John

After researching and playing with the system, I found a solution. Uninstalling the "Realtek High Definition Audio Driver" under the Control Panel -> Hardware and Sound enables sampling rate up to 384KHz instead of 48KHz.
If there are other solutions without uninstalling the HD audio driver, please post. Thanks
Eddie

Audio problem ( sample rate/ mismatch samplerate )

Hi everyone,
I'm using a Macbook white Mid 2010, everything is fine but recenly i bought a USB interface to record music from my instruments ( Mic and guitar ) through garageband..
I have watched steps on how to connect guitar to garageband, and i did those steps by selecting USB channel as input..
The problem is every time i test my guitar or microphone, it sounds terrible just like little chipmunk or something. Some ppl told me my sample rate is mismatch. I also was checking around on Audio Midi Setup, i can't change my sample rate for my USB audio interface. The input for it, is 28000KHz, and i was told garageband only accepts 44000KHz.. So i thought my USB interface was having a problem..
However today i have tested my microphone on my old iMac white, i did plug in my USB interface and microphone, it worked so fine. The sound was not like on my macbook. it just fine and very clear. So my USB interface is not the problem..
BTW audacity also works fine on my macbook, only garageband..
Could someone help me? I can give you more details about it..

Canon cameras are notorious for recording with nonstandard sampling. Usually, though, material will capture without synch problems.
Make sure you have "abort capture on dropped frames" and "create new clip on timecode break" enabled in fcp: user preferences: general and do not capture over a control track break (where you see just "noise" in the video

FCE Capture-sample rate error

After capturing Digital8 footage off my Sony DCR-TRV310, I get this error.....
"The audio sample rate of one or more of your captured media files does not match the sample rate on your source tape. This may cause the video and audio of these media files to be out of sync. Make sure the audio sample rate of capture preset matches the sample rate of your tape."
So far, in spot checking the media it seems to be OK, but I'm anal about errors! I couldn't find the audio sample rate for the camera/tape in the sony manual, any ideas? Also were do I select the audio sample rate of capture preset, even if I knew the tapes sample rate? Or is this nothing to worry about
Thanks, Schooner

Hi(Bonjour)!
Usually, camcorders allows to set the audio sample rate to 12 bit (32 kHz) or 16bit (48 kHz).
The audio sample rate for DCR-TRV 310 can be set to 12 or 16 bit. See page 57 in this user manual:
http://www.mediacollege.com/equipment/manual/sony/camera/dcrtrv315.pdf
FCE easy setup allows to select DV-NTSC 32 or 48 kHz for sequence. This settings apply to capture session too. The message you've got means that the audio sample rate on tape doesn't match the sequence audio format.
This problem may give a drift synch between audio and video.
First check the item format for video clip in browser. The audio sample rate should be 32 or 48 kHz. Note it and select the right setup in easy setup dialog. Create a new sequence and insert your video clip.
Michel Boissonneault

Problems with audio Parallels sample rate

Hi!
I recently I installed Finale 2014 in my iMac (Os X 10.9.2) and, when I try to run the application, I receive an error message telling that I must adjust my audio sample rate to 44.1 kHz and Finale crashes. So, by going to Applications --> Utillities --> Audio and MIDI Setup, I adjusted the sample rate to this value and the issue continues to appear. By contacting Finale support, they told me that I must remove my audio device from Parallels Desktop 9 (I was not allowed to adjust this device). But, the problem is that I simply can not remove the device - when I select the device, the " - " signal is in gray. How can I remove the device, in this case?
Thank you!

Hello!, first of all thanks for your reply. Yes, the camera is the same, the problem is on my computer, I have discovered a solution: first I capture the audio, only the audio, and then the video, only the video. After this I soncronize the two separate files on Final Cut timeline. It´s a slow process, but I am really desesperated. I don´t know what happens, I few minutes ago I have captured a 30 mins. video and the sample rate of the audio was 42.145k (???). It´s a crazy thing...

How does Core Audio set sample rate?

When I play a particular movie in QuickTime, the audio and video are out of sync. The movie plays fine on other computers.
This Mac Pro (OS 10.6.8) is used exclusively for Pro Tools and Final Cut Pro. The audio hardware is a Pro Tools HD Native card:
Native card --> Pro Tools Digital I/O boxes --> Lavry D/A converters --> monitors
The sample rate of the Digital I/O boxes is set by an external master clock, a Lavry Gold A/D converter.
I opened the DigiDesign Core Audio Manager and it says:
Connected @ 44.1K, 32 In/32 Out, Buffer Size 512
Yet the movie is at 48K (I know because I created it in Final Cut Pro), and the external clock is set at 48K. So, I don't know where the 41K in the Digidesign Core Audio Manager came from. This is why I am guessing the problem is sample rate.
Please help me understand what sets the sample rate.
Does the application using Core Audio set it?
If so, how is this made consistent with the sample rate set for the hardware by the external master clock?
Do I have to be sure I always change the external clock setting to be consistent with the movie being played?
BTW, I have not had a sync problem when I play video in Final Cut Pro..........it is always in sync. So, I have never worried about how Core Audio works. The sync problem is only with QuickTime.

Well, here is more information:
- I reinstalled QuickTime 7 and did many other things (trashed preferences,etc)
- I set the audio hardware (Pro Tools/HD Native card) to 48k
- I checked the Digi CoreAudio Manager and it said "Connected at 44.1K", even though the hardware was set to 48K
- I played the problem videos, and all are now in sync
- I check the Digi CoreAudio Manager and it still says 44.1K
- I checked the hardware and it is now set to 44.1K
I know that the videos are 48K, because I created them in Final Cut Pro X.
Does this mean that QuickTime 7 always converts videos to 44.1K, regardless of their sample rate?

DIgital audio in sample rates, 441 48 96 but no 882... is there a way to ad

When feeding my macbookpro a digital audio signal via optical cable while viewing the audio midi setup utility, it shows that the mbp's internal clock automatically switches to the incoming sample rate. I got it to work with 441,48 and 96k. When I fead it the 882 sample rate it automatically switches back to the mbp's internal clock and reverts to line input instead of digital. So the audio midi setup utility shows when it is in digital input mode the three sample rates 441,48 and 96k in the format pop up window and not 882 so it must be just a software issue and I am wondering if there is a way to add the sample rate to the list. If it can take in 96k it should also be ale to take in 882. So does anyone know how you could ad a sample rate of 882 to the list in the audio midi utility format list?

One added note. The reason that I want to be able to do this is I like to record my audio projects at 882 and if the mac book pro could except the sample rate I could then use it as a 882 digital 2 track recorder. Enabling me to skip hitting the bounce to disk function in pro tools and actually be able to ride a fader as the mix is printing to the macbookpro, where as when you bounce to disk in pro tools you cannot access the mix as it bounces to disk.

Imported Audio Not Sample Rate Converted?

I received some audio files for a project that were accidentally sent at 48k instead of the 44.1 I need.
Isn't Logic supposed to automatically do the sample rate conversion if you have the little settings box ticked for "convert sample rates for imported audio"?
I can't get it to work. I use the audio bin "add audio files", and import the 48k files. They get imported, but remain at 48k, unchanged, after import.
Is this another bug or is there some part of the process I'm missing?

Import Audio File (Shift Command I).

Q: Convert audio bit & sample rate during import

I have a project that's in 24bit/48KHz, and want to import an audio file (mp3) that's in 16bit/44.1KHz.
When I import the mp3 file into the project either through drag & drop or the Add Audio File dialog box, it doesn't convert the file into the project's native bit & sample rate. Consequently, when I play it back in the Arrange window it plays in chipmunk voice.
I thought Logic used to automatically convert audio files into native resolution. How do I do this in Logic 8?
Thanks,
Steven

Thanks for the response. My project currently does have those options checked, and it's still not converting.
To double check, the mp3 file does get copied to the project's Audio Files directory. It also creates a file with the same name and the file extension .ovw - but doesn't seem to be converted.
Any ideas? Thanks again -

Audio/Midi sample rates

Hello, I am new to Logic/DAW recording so please forgive this "newbe" question.
I was getting an error "while trying to synchronize audio and midi" after installing an audio loop.
I found that the "fix" was to go into the settings>audio>samplerate>48K
Fine, the error message stopped.
But, does this mean that if I wish to use the audio samples in Logic8, I must use the 48K sample rate for the whole project? Or can I use a higher sample rate for live audio (ie 96K) and use the L8 samples at the same time?
Thanks for any help you may offer, Brian.

Hi, and Welcome to the forum
instead of changing the sample rate of your song to match your loops, change the sample rate of your loops to match the song. Read pages 143-145 of the manual
Don

Blue lines through audio, NOT sampling rate

Hello,
A friend is editing some audio, using a lot of tracks (around twenty) and shifting the speed. For some reason audio clips that were slowed to 80 percent are appearing with a blue line through them and playing at a very low volume. I checked the sampling rate and it's 48kHz. Also frustrating is that these playback issues are intermittent.
Any suggestions would be great.
thanks,
jesse

He probably doesn't have the CPU horsepower to render twenty audio tracks on the fly. In User Preferences, you can do a few things to reduce the need to render audio:
a: increase the number of tracks for 'Realtime Playback' - the default is 8 I think, and it can usually handle more;
b. reduce the audio quality to low - it really doesn't sound bad at all, and it only affects your preview audio;

Audio midi sample rate resetting

I set my optical output of the Audio Midi Setup to be 96k, 24bit. Whenever I reboot the mac, it goes back to the defualt 44.1k. Any idea why? This didn't happen in OS X.6
Mac Pro 3,1
OS X.7.3

This is probably due to a corrupted preferences file.
How to fix it:
1. hold down the option key and in the Go menu in the finder, scroll down to Library
2. in the library folder, find the preferences folder.
3. find a file named com.apple.audio.AudioMIDISetup.plist
4. drag that file to the trash
5. restart, or sign out and then back into your user account
6. a new preferences file will be generated (with default settings). Enter your new preferences, and they should work properly.

Determining DV tape audio sample rate

I have DV tapes of "archived" final edits recorded on to mini DV tape using two "early" (late 90's) Sony DV cameras with some segments of the same tape recorded with 48k audio and other sections with 32k audio (on the same mini DV tape). I tried to capture the footage into FCP 5.1.2 using a Sony DSR-11 deck and a G4 1.42 GHz dual processor w/ 2 gigs RAM, Radeon 9800 Pro video card, Mac OS 10.4.8
Everything seemed fine until I got a message after capturing a 3 minute clip using a stock FCP 5 NTSC preset with 48k audio; the message stated the "audio source rate and capture sample rates did not match & footage may be out of synch" - the captured clip played back perfect. The DSR-11 did not display the DV tape's audio sample rate; I put the DV tape into the camera it was originally recorded on and "16 bit" displayed on the camera's LCD screen.
I tried capturing the same footage using FCP 4.5 installed on another drive in the same computer, and got no warning message re: audio sample rate. Just to "be sure", I created a custom capture preset that included 32 bit audio and captured the same clip using FCP 4.5 with a preset for 32k audio - no warning message, and everything was perfectly in synch. Everything was in synch for ALL the captured clips & the audio sample rate in FCP for captured footage was either 48k or 32K for each respective preset.
The dilemma: how to be certain what the true/original audio sample rate is.
G4 1.42 GHz Mac OS X (10.4.8)

"audio source rate and capture sample rates did not match & footage may be out of synch"<<</div>
William,
The message itself seems to be a bug that started with FCP 5 - most users that receive this message have reported that there is NO actual problem.
-DH

Audio capture sample rate

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