[mod_amrwb] Intermittent Noise During AMR-WB Playback

[alpercoskun]

Describe the bug
On FreeSWITCH 1.10.11, we are experiencing intermittent noise during playback using the AMR-WB codec. We compiled the opencore-amr (0.1.6) and vo-amrwbenc (0.1.3) libraries with their latest versions. Additionally, the mod_amrwb module is compiled from FreeSWITCH 1.10.12.

The client is an Android phone. Our product is a VoiceMail-like telecommunications service, which is based on FreeSWITCH. It plays .WAV files such as "You have no new messages".

We tried to change "force-oa" value to 1, and "mode-set-overwrite" value to 1 from amrwb.conf.xml, but both of these options are not accepted by the handset/network, which sent BYE immediately.

We also tried AMR (mod_amr) codec too, it is working fine.

To Reproduce
Enable AMR-WB codec, use an android phone with AMR-WB codec support, make an incoming call towards FreeSWITCH.

Expected behavior
Audio playback should be clean and free from artifacts or noise during the entire playback.

Package version or git hash
FreeSWITCH version: 1.10.11 [but mod_amrwb is from 1.10.2]
opencore-amr version: 0.1.6
vo-amrwbenc version: 0.1.3

Trace logs
freeswitchlogs_20250120.txt.zip

[alpercoskun]

Audio file is extracted from tcpdump
rtp_vm_20jan_1.3ga.zip
You can play it via VLC.