[Bug] internal voice sounds robotic / almost unintelligible for all players

[skriptzip]

Summary

With voice_internal, voice is robotic and almost unintelligible for all players. Reproduced on a live Docker server and on a clean Windows setup. Occurs with spatial channels and with a single non-spatial (2D) channel via the server-side voice API (CreateVoiceChannel / AddPlayerToVoiceChannel). Lowering voice_inBitrate to 64000 did not help.

Issue type

Both / Unsure

Repro rate

Always

Server build version

FXServer-early-access b170 linux

OS

Windows 11 Pro 25H2

CPU

AMD Ryzen 7 9800X3D

GPU

NVIDIA GeForce RTX 5080

RAM

32 GB DDR5

Storage type

SSD NVMe

Connection type

Ethernet

ISP and bandwidth

900 Mbps up / 500 Mps down

DxDiag

No response

Network graph

No response

Platform

Docker

OS version / distribution

alpine:3.20 / Windows 11 version

CPU

No response

RAM

No response

Using txAdmin?

No

Hosting provider

Self-hosted

Machine type

Dedicated

/perf endpoint output

No response

DDoS protection

No

ulimit -n value (Linux only)

1024

Docker Compose file (Docker only)

services:
  fivem:
    image: ghcr.io/skriptzip/fivem-enhanced:170
    restart: unless-stopped
    ports:
      - "30120:30120/tcp"
      - "30120:30120/udp"
    volumes:
      - ./fivem-data:/fivem-data
    environment:
      - TZ=Europe/Berlin
      - LICENSE_KEY=<removed>
    security_opt:
      - no-new-privileges:true
    cap_drop:
      - ALL
    cap_add:
      - SETGID
      - SETUID
    tmpfs:
      - /tmp:noexec,nosuid,size=64M
      - /server/.fxs_home:size=16M

Steps to Reproduce

1. Enable voice_internal in server.cfg.
2. Run this server-side script:

local channel = CreateVoiceChannel(0, 0.0)

AddEventHandler('playerJoining', function()
AddPlayerToVoiceChannel(channel, source)
end)

3. Connect with two clients and talk to each other.

Expected Behavior

Clear, intelligible voice, as with the previous Mumble-based voice at the same bitrate.

Actual Behavior

Voice sounds robotic and is almost unintelligible. Affects all players.

Ruled out so far:

• voice_inBitrate lowered from 128000 to 64000
• checked Server load & package lost
• switched between 2d / 3d channel types
• switched from linux docekr stup to clean windows setup on local pc

--> no change

Evidence

example.mp4

Additional Context

No response

[wolfram-cfx]

Hi, have to close as duplicate of #551.