Voice messages on desktop are ~4 times larger than from phone

[jeremymasters]

• [x ] I have searched open and closed issues for duplicates

---

Bug description

Voice messages of equivalent time are about 1/4 smaller when done on a phone than when done on a PC

Steps to reproduce

• Record voice message from phone and send
• record voice message from pc and send

Actual result: Voice messages from pc are about 4 times larger for an equivalent amount of time
Expected result: Voice messages from phone or pc are within maybe 30% size-wise.

Platform info

Operating System: Windows 7 Pro
**Android System for comparision: Samsung Note 5 and S8, both Android 7.0 stock
Browser: Version 61.0.3163.91 (Official Build) (64-bit)
Signal version: 0.43.4

Example:
I had a voice message from a phone to me that was 42k and 9 seconds
I sent a voice message from my pc that was 88k and 4 seconds.
Not saying this is a huge deal, but if it's a matter of switching a couple knobs, it would save some data + time.

[rmueller83]

You should have specified which type of phone. Recording a 3 second voice clip, the desktop client generated a 69kb MP3 Stereo file, Android made a 15kb AAC Mono file and iOS created a 100kb M4A Stereo file, being the worst in size. So switching to Mono could be a first step to cut the size to half. Perhaps a different codec would also help, at least there are FFmpeg JS ports which support AAC.