Voice_name is not working for "gemini-live-2.5-flash-preview"

Gemini API
1

For “gemini-live-2.5-flash-preview” model - voice_name is not working. I tested it with “gemini-2.5-flash-native-audio-preview-09-2025”, it works well though.

geminiSession = await ai.live.connect({
model : “gemini-2.5-flash-native-audio-preview-09-2025”,
config: {
responseModalities: [Modality.AUDIO],
systemInstruction: {
parts: [{ text: `` }]
},
speechConfig: {
voiceConfig: {
prebuiltVoiceConfig: {
voiceName: “Autonoe” // Female voice
}
}
}

3

Hii StellaHoang,

Apologies for the delayed response.
Could you please provide the complete error message encountered while using the gemini-live-2.5-flash-preview model?
This will help us investigate the issue more effectively.

5

My apologies for not being clear, there was no error, it just if you set name for different voices for the non-native model, it wouldn’t work. The model would just randomly response with a different voice each time.

We didn’t observe it with the native model.

7

Hii,

We tested it using the gemini-2.5-flash-preview-tts model, and it’s working on our end. We recommend using gemini-2.5-flash-preview-tts for a better experience.

Code:
from google import genai
from google.genai import types

from google.colab import userdata
API_KEY = userdata.get(‘API_KEY’)
client = genai.Client(api_key=API_KEY)

import wave
def wave_file(filename, pcm, channels=1, rate=24000, sample_width=2):
with wave.open(filename, “wb”) as wf:
wf.setnchannels(channels)
wf.setsampwidth(sample_width)
wf.setframerate(rate)
wf.writeframes(pcm)

import waveresponse = client.models.generate_content(
model=“gemini-2.5-flash-preview-tts”,
contents=“Say cheerfully: Have a wonderful day!”,
config=types.GenerateContentConfig(
response_modalities=[“AUDIO”],
speech_config=types.SpeechConfig(
voice_config=types.VoiceConfig(
prebuilt_voice_config=types.PrebuiltVoiceConfig(
voice_name=‘Autonoe’,
)
)
),
)
)

data = response.candidates[0].content.parts[0].inline_data.data

file_name=‘output.wav’
wave_file(file_name, data)