Recover & Convert WhatsApp/Viber Audio

I need a specialist who can dig into an Android device that I have fully unlocked, locate every trace of cleared-out voice notes from both WhatsApp and Viber, and hand them back to me as individual, clearly labeled MP3 files. The phone is in my possession and can be connected to a computer; no iCloud or other ecosystem is involved, so the entire recovery will revolve around on-device folders and any local backup archives that may still exist.

Here is what the job entails from my side:

• You will connect to the handset only while it is in my view (USB debugging or ADB pull, whichever you prefer) and work in an isolated, offline workspace.
• Typical tools you might rely on—ADB, Android Studio file explorer, SQLite viewers for the message databases, plus FFmpeg or sox for audio conversion—are all acceptable as long as everything stays local.
• Once you have extracted the original .opus or .ogg clips, convert each one to MP3 without transcoding loss that would hurt audibility; I expect normal speech to be crisp and free of artifacts.
• Keep logs minimal, strip personal identifiers in any script outputs, and delete every copy of the raw data as soon as I acknowledge safe receipt.

Deliverables
- A folder (zipped) containing the recovered, correctly named MP3 files for both WhatsApp and Viber.
- A brief plain-text note outlining the exact folders, commands, and checksums you used so I can reproduce or audit the process later.

If you have completed similar Android WhatsApp or Viber recoveries before, describe your usual workflow and any privacy safeguards you apply—this will help me choose swiftly.