@MatthewEverett-Gates

Hi

. . . . problem starts (indeed dense video effects and 4 layers + audio) . . . .

Do you get a short chirp of 'clicks' or, for want of a better description, a quick 'brr' .

What is the sample rate for the audio portions of the video clips, and have you tried replacing the MP3's with 48kHz samplerate WAV format?

I am getting a semi random 'chirp / brr' in the current projects i am working on, so far I have narrowed down the issue to be where a 44.1kHz and 48kHz Sample Rates (SR) audio crossfades with 2 or more other video audo tracks (48kHz sample rate).

Conversion of the 44.1 Hz MP3's to 48kHz SR audio clips, in my case AAC encoded, so far looks promising.

John EB
Forum Moderator

Thanks! I fixed it, but didn't identify the exact problem.*

More chirps: extreme breaks in volume (decrease) with static sounds there. No continuous 'brr.' Note, my mix/EQ is not good, though no peaks at all (top at about -3db; typically -6~9db).

"44.1kHz and 48kHz Sample Rates (SR) audio crossfades..." is good info. Some objects of stock footage had audio, but I'm not sure that was it- I don't recall any that I used in the end actually had audio. However, in 1st draft I duplicated a live video recording with camera audio, too many times, and some of those short objects still had their audio (similar quality per settings on cam, but probably different codec). My source is 48kHz, and worked in the end (still not sure why I couldn't see the WAV file in Imports when I tried to replace audio track with that).

*I solved the issue by deleting all objects from the previous splice without layers/transition, to the next one; about 3:23~4:23 in 7:03 video (24 seconds before audio started cracking. This after trying to delete individual objects about 10 times without identifying the cause.
I re-edited the minute of video, adding the same clips, but with better arrangement; not sure how to describe this because I don't know what taxes the system or stops it, yet: e.g., eliminated overlapping objects that were unused, used same-track object transitions where there was no laying, and less effects (omitted motion templates). Some stock footage had 1020 height, which I resized (before and after problem).

Still interested in what causes this so I can avoid it next project: differing audio source problem is good info. I still have the project save with error(s)- for now I think less stacking and more reading the manual is best, considering my low-power system.

Kind Regards,

Matthew

Ray, I had increased audio buffers from 6 to 9 (max), without solving issue (forgot to post that). Using 32bit source, but have yet to identify the camera audio which was left in some vid objects.

I have to go over the problem project file, though I dread it, and detail the parts to show at least what not to do as compound set of things.

@MatthewEverett-Gates

Hi Matthew.

This may take a while and a few more questions / steps to get sorted.

You say you are using Cubase 13? Does that mean you are using a separate audio interface? If so are you using that with Movie Studio?

It's possible to also play with Movie Studio's other audio settings and try altering them.

Those settings work for me most of the time but not always. The image just shows things that can alter how well the audio plays back. I tend to try to go for low buffer counts and higher sampling rates where possible.

Is the project residing on your C: drive or another drive? If another drive, is it an internal drive or external USB drive?

I am still of the opinion that while some systems could cope with a 32bit audio file it is an unnecessary strain on your system when dealing with video editing as the audio is not dealt with in a similar manner to a daw. I can for instance use 32bit wav files within Movie Studio but it is a strain on my system and there is no real benefit in dynamic range of an exported render over using 16bit files. The fidelity of the file relies more on the sample rate of an audio file while the bit depth gives it its available dynamic range. I agree with John that using different sample rates in one project also doesn't help and best kept to 48kHz.

There may be time gaps in replies from both @johnebaker and myself if you reside outside of the EU.

I am turning in for the night now. Hopefully John may have a few additional ideas or questions as well.

Ray.

No probs: I’m in Japan. This is my first time on a forum.

I don’t need quality of audio while editing, except for occasional subtle moments, but need it for final output. Can I use a low-quality dummy file while working and swap it out at the end, assuming no interim audio process to affect the timecode?

I can post list of all edits and source specs, with images (and the render example on YouTube/my webpage). Busy until Thursday.

I understand there’s a strong audio software, but I haven’t used it here yet except to turn it on/off: just file in track (rendered in Cubase13), and maybe applied a process for testing and undid it right away.

Not C: drive. Using mirrored SATA HDDs, exact same model, couple years different Seagate (~2TB free).

I don’t know mirrored drive tech in reference to this software, or if C: drive is better. I, decided to try out processing straight to my storage drives. I’ll use C: drive if it’s actually better; only need to figure out how to move whole projects for stability/capacity (have 52GB total ~1 month work (including audio source copies and renders), but 680GB free on C: at present).

Matthew

@MatthewEverett-Gates

Hi

I assume your system is set up as:

C: drive is for Windows and installed programs, the mirrored drives are for data only, no programs are installed on the mirrored drives.

We need more information about:

• The video file's resolution, encoding format and internal structure. Download and install MediaInfo and analyse one of the clips and post the results, see this tutorial on how to setup MediaInfo and analyse a video clip for all the data required.   
    
• Export preset you are using and did you make any changes to it?
   
• A screen shot of the Program settings, Device options tab would help.

For the issue I was having the workaround, for me, was to use the Edit, Combine audio option to mixdown all the audio into one audio file once all editing was complete.

If you decide to test this, make a backup copy of the project before doing so.

John EB

Thank you, I will do that - probably Thursday.

Yes, all programs on C: with OS, Win10. Magix project files and source media on D: (mirrored 2x drives); but I forgot: stock footage DL'd to C: in standard Magic folder- so using both drives for source materials right now.

Matthew

Here is one of previous project files (I have a few before fix) Program settings, Device options, and Export Settings (plus Advanced); and MediaInfo report for a test- I have several tests after the problem appeared, and about 14 clips as objects in the area I deleted and redid to fix.

General
Complete name                            : E:\MESOS\2 Production Operations\2_5_Storage\Asset Access\_Video Process\Magix Renders\D2S-J_spec\Archive\20251120-vids_D2S-J_spec_AudioCheck006.mp4
Format                                   : MPEG-4
Format profile                           : Base Media
Codec ID                                 : isom (isom/avc1)
File size                                : 33.1 MiB
Duration                                 : 17 s 517 ms
Overall bit rate mode                    : Variable
Overall bit rate                         : 15.8 Mb/s
Frame rate                               : 29.970 FPS
Encoded date                             : 2025-11-30 17:23:34 UTC
Tagged date                              : 2025-11-30 17:23:34 UTC

Video
ID                                       : 1
Format                                   : AVC
Format/Info                              : Advanced Video Codec
Format profile                           : High@L4.1
Format settings                          : CABAC / 2 Ref Frames
Format settings, CABAC                   : Yes
Format settings, Reference frames        : 2 frames
Format settings, GOP                     : M=3, N=30
Codec ID                                 : avc1
Codec ID/Info                            : Advanced Video Coding
Duration                                 : 17 s 517 ms
Bit rate                                 : 15.7 Mb/s
Width                                    : 1 920 pixels
Height                                   : 1 080 pixels
Display aspect ratio                     : 16:9
Frame rate mode                          : Constant
Frame rate                               : 29.970 (30000/1001) FPS
Color space                              : YUV
Chroma subsampling                       : 4:2:0
Bit depth                                : 8 bits
Scan type                                : Progressive
Bits/(Pixel*Frame)                       : 0.252
Stream size                              : 32.7 MiB (99%)
Writing library                          : AVC Coding
Language                                 : English
Encoded date                             : 2025-11-30 17:23:34 UTC
Tagged date                              : 2025-11-30 17:23:34 UTC
Codec configuration box                  : avcC

Audio
ID                                       : 2
Format                                   : AAC LC
Format/Info                              : Advanced Audio Codec Low Complexity
Codec ID                                 : mp4a-40-2
Duration                                 : 17 s 472 ms
Bit rate mode                            : Variable
Bit rate                                 : 165 kb/s
Channel(s)                               : 2 channels
Channel layout                           : L R
Sampling rate                            : 48.0 kHz
Frame rate                               : 46.875 FPS (1024 SPF)
Compression mode                         : Lossy
Stream size                              : 351 KiB (1%)
Language                                 : English
Encoded date                             : 2025-11-30 17:23:34 UTC
Tagged date                              : 2025-11-30 17:23:34 UTC

CreatedOn                                : UTC 2025-12-04 12:19:43

NOTE: I have a few project files where I was going through the process of trial and error repairs, and a few more renders (I had already deleted an object source file in this one- see the small gap in timeline). I'm not sure these two (project/render settings [3 images] and the render MP4 info file) are matching, but I can produce exact matching ones because both of these and more in archive have the audio glitches both in program and rendered MP4. I think they are near identical states of the system. The MediaInfo report is from a short render of just the affected area.