Simulate packet loss and jitter to hear what degraded audio sounds like
Drop an audio file here or
WAV, MP3, OGG, FLAC, M4A, AAC, Opus
Sample Files
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Codec Settings
Network Conditions
0%100%
0 ms500 ms
0 ms1000 ms
0 ms200 ms
Advanced Simulated Fixes
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0:000:00
0:000:00
Audio Quality Index
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Packet Loss0%
Jitter0%
Latency0%
Formula Reference & Config
Packet Loss
Jitter
Latency
where
Variables
Packet loss degradation (0–100%). Immediately audible — even small amounts produce dropouts and missing words.
Jitter degradation (0–100%). Jitter above the 20 ms frame duration causes buffer underruns, producing choppy or robotic audio.
Latency degradation (0–100%). Delay above the threshold is perceptible but does not degrade intelligibility the way loss and jitter do.
Measured packet loss percentage (0–100%).
Measured jitter in milliseconds (standard deviation of inter-arrival times).
Measured end-to-end latency in milliseconds (PTT key-in to audio receipt).
Audio Quality Index v2 (E-Model)
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Baseline (R0)--
Delay (Id)--
Loss (Ie,eff)--
Formula Reference & Config
Delay
Recovery
where
Variables
Baseline quality (0–100). Maximum R-factor at the selected Opus bitrate with zero network impairment. Ranges from 75 at 6 kbps to 100 at 32+ kbps. Derived from the bitrate selected above.
Delay impairment. Penalty from effective latency (network latency + jitter buffer). Mild below the knee point, steeper above it.
Codec base impairment. Quality loss from compression alone (100 − R₀). Higher at low bitrates, zero at 32+ kbps.
Effective equipment impairment. Penalty from packet loss, modulated by codec robustness (Bpl). Asymptotically approaches 95 at extreme loss.
Effective latency in milliseconds. Sum of network latency and jitter buffer delay. Jitter itself does not directly enter the formula — it forces a larger buffer, which increases EL.