Minimax TTS is not outputing audio !
# ❓・bug-reportm
Michel D.
02/27/2026, 4:18 PMThe calls logs show STT but the recording clearly reveal that the TTS didn't work : the agent was silent !
call_83fa0e53302ac5b1b939377199a
call_0b79d06609165d8b9e6a911c4b6
call_cfbdc011c741fae68be0c0f3304
call_dc11811416e717450d16ca8e22b
@Omar Ashraf | Community Lead @Colin - Integrations @ Retell AI Please could you explain what happened guys ?
I have a fallback voice on this agent which didn't take over, why ?
Thanks !
s
Shehroze -Support @Retell
02/27/2026, 4:26 PMHi @Michel D.
m
Michel D.
02/27/2026, 4:27 PMHi !
s
Shehroze -Support @Retell
02/27/2026, 4:27 PMI send this to the team to look what happened
m
Michel D.
02/27/2026, 4:27 PMThanks, do you think it will be checked soon ? our customer is getting nervous rn...
s
Shehroze -Support @Retell
02/27/2026, 4:28 PMYes as soon get a reply I will get to you
m
Michel D.
02/27/2026, 4:28 PMMany thanks !!
s
Shehroze -Support @Retell
02/27/2026, 4:29 PM@Michel D. can you share your agent id
m
Michel D.
02/27/2026, 4:29 PMSure !
Michel D.
02/27/2026, 4:30 PMThere you go : agent_7335ace819c120990386b3ce07
Michel D.
02/27/2026, 4:30 PMThe fallback voice set is : custom_voice_0d97cc8601b767ef6a808dea31
s
Shehroze -Support @Retell
02/27/2026, 4:30 PMOk
Shehroze -Support @Retell
02/27/2026, 5:59 PMHi @Michel D. team is looking into this
m
Michel D.
02/27/2026, 5:59 PMHi, thanks, our customer is getting so damn nervous lol
o
Omar Ashraf | Community Lead
02/27/2026, 6:22 PMHello @Michel D. , can you test it now ?
Omar Ashraf | Community Lead
02/27/2026, 6:24 PMand can you tell me how you got it in this state?
Omar Ashraf | Community Lead
02/27/2026, 6:24 PMdid you use the dashboard , API ?
Omar Ashraf | Community Lead
02/27/2026, 6:26 PMYour voice agent some how was using Minimax with cartesia model!, do you have any idea how you did it ?
m
Michel D.
02/27/2026, 6:49 PMWe use API only
Michel D.
02/27/2026, 6:50 PMWow strange !
Michel D.
02/27/2026, 6:51 PMWhat was the voice_model ?
o
Omar Ashraf | Community Lead
02/27/2026, 6:51 PMsonic-3
m
Michel D.
02/27/2026, 6:51 PMBut that’s overridable no ?
Michel D.
02/27/2026, 6:52 PMThe documentation shows that the create phone call endpoint allows to override the voice_model ?
o
Omar Ashraf | Community Lead
02/27/2026, 6:53 PMthe team is investigating this, if there is any new update I will let you
Omar Ashraf | Community Lead
02/27/2026, 6:53 PMfor now the service is working for you right ?
m
Michel D.
02/27/2026, 6:53 PMI’m not home rn but I hope so !
Michel D.
02/27/2026, 6:54 PMCould you keep me posted when you find out the reason ?
Michel D.
02/27/2026, 7:37 PMCould you explain this please Omar ? I’ve always been able to override an agent voice_model via an API create phone call request
o
Omar Ashraf | Community Lead
02/27/2026, 7:50 PMHello @Michel D. ,
this was part of your request
"agent_override": {
"agent": {
"voice_id": "minimax-Camille",
"voice_model": "sonic-3",
"voice_emotion": "happy"
}
}
which has conflicting voice_id and voice_model. we currently don't validate the compatibility.
m
Michel D.
02/27/2026, 8:34 PMOk yup that makes sense so it’s on my end.