Able to mix 44.i and 48k audio?

Craigster wrote on 10/2/2012, 5:07 PM

I was working on a substantial project (several hundred video clips and photos - culled from about 30GB of data, 26 minutes of final footage) on ProX3 -- with everything going well...

However, as I brought in audio from external mic sources, I then had a mix of 48k audio (from my camera) and 44.1 k audio from my digital recorder. For a little while things were fine. Then, without warning, my graphics went haywire. My tracks view started flashing. The lanes of tracks became small (short rather than tall) and would sometimes compress to 100% view, losing all zoomability. Worse, the preview monitoring capability was completely lost. Rather than showing a scene, it became a miniature view of the corrupted track display -- except as a still, and non-manipulatable.

I was hoping to get some assistance from Magix, but I'm beyond my 1 year, so they are now charging.

I was able to back up a couple SAVE versions to prior to the mixed audio additions, where things were still working well. However, I still need to add the audio back in.

Has anyone either:

- been successful or had problems mixing audio sample rates in ProX?

- Has anyone ever experienced this crazy video graphic corruption I've described?

I have now pursued common recommendations: i.e. new virus definitions/scan, Windows Updates, current drivers, etc. Again - the program works fine on other projects and earlier versions of this project. I even pulled up my dual-boot XP version of ProX3 - and got identical results. So, it doesn't appear related to my installation. O, and also: YES I am on the latest update.

Thanks for any helpful guidance!

Craig

Comments

emmrecs wrote on 10/3/2012, 3:24 AM

Hi.

I've never tried to create a project with multiple audio sampling rates but I suspect your thinking that this is the cause of your completely corrupted display(s) is correct.

I don't know exactly what your computer spec is but on mine, I have to ensure my internal soundcard is set to 48kHz or VPX/MEP "throws a wobbly". (I also do quite a lot of purely audio editing, which is often at 44.1kHz; hence the necessity to check!)

I think in your case the corrupted screen might actually be being caused by your soundcard driver, silly as that might sound. My main audio editing program is Adobe Audition and, in earlier versions at least, other users have reported "graphics" problems which were ultimately traced back to the audio driver!

So, you need to sample convert the 44.1kHz audio files to 48kHz. For this I would obviously use Audition but for you to buy a multi-hundred dollar program just to convert these files is overkill! However, I am sure there must be other (cheaper, even free) programs that allow you to "save" a file at a different sample rate. I wonder whether the free, opensource "Audacity" can?

OTOH, I've just fired-up VPX3 (for the first time in many months) and looked at the Record>Audio screen. If there is any way in which you can "record" rather than "import" your digital recorder files into VPX there is a setting on the Audio Recording screen (under "Recording Quality>Advanced") a check-box which says "Realtime re-sample to project's current sample rate" which would do exactly what you need!

HTH

Jeff

robin2 wrote on 11/18/2012, 3:33 PM

No, you cannot mix incompatible sampling rates. No reason to! You'll have to convert one or the other to be compatible. It's easy to convert the highest sampling rate in any decent audio manipulation program. Trying to increase a lower rate is not recommended.