When Recording Multiple Audio Tracks at the same time, Tracks Sometimes Fall Out of Sync

Steps to Reproduce:

  1. Open the Cubasis app on your Samsung Galaxy Tab S9.
  2. Start a new multi-track recording session.
  3. Assign different input sources to separate tracks—for example, use external microphones on some tracks and the tablet’s default microphone on another, or even use the default microphones for all tracks if possible.
  4. Begin recording all tracks simultaneously.
  5. After recording, play back the session and observe that the audio tracks are not perfectly synchronized.

Additional Details:
The synchronization issue occurs intermittently.
Notably, the problem happens even when using the tablet’s built-in default microphone, indicating that the issue may not be limited solely to external hardware differences.


  1. Expected Results
    All audio tracks should remain perfectly synchronized during both recording and playback, regardless of whether external or built-in microphones are used.

  1. Actual Results
    In some instances, the audio tracks are not aligned correctly during playback, resulting in noticeable timing discrepancies and drift.

  1. Environment
    Device: Samsung Galaxy Tab S9
    Android Version: 14
    Cubasis Version: 3.7.1
    Additional Hardware: Multiple external microphones (when used) or the tablet’s default microphone

I have attatched some images for better explanation, please check this problem out and help me fix it. Older version of Cubasis didn’t have this issue.