kurben

I guess the channels are all with AAC sound? If any of the channels have mpeg or AC3 try to switch to that.

The channels with the sound jitter, are they using the AAC audio format? Check with yellow button. 

Here is a recording from a SD channel with AAC-HE audio that has NO problems, the level is alright and no audio dropouts. 

https://www.dropbox....dkriget.ts?dl=0

Will do later this evening.

Here are one recorded clip. This one is containing three audio streams, AAC-HE, AC3 and one for Visual impared.

When listening on this clip using VLC for example on your PC, the audio level is correct on both AAC-HE and AC3. But when played back on VU+ box the AAC-HE stream is much lower.

https://www.dropbox....Sverige.ts?dl=0

If you switch between AAC-HE and AC3 you can hear the droputs. Even on VLC