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filler phrase while starting tool call #232

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Merged
rootflo-hardik merged 6 commits into from
Mar 2, 2026
Merged

filler phrase while starting tool call #232

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7881485
filler phrase while starting tool call
rootflo-hardik Feb 27, 2026
92a32dd
skip tts phrase when lang switches
rootflo-hardik Feb 28, 2026
90630d7
removed periods from filler phrases
rootflo-hardik Feb 28, 2026
8a5ca52
Merge branch 'develop' into CU-86d243yj6-voice-agent-filler-phrases
rootflo-hardik Mar 2, 2026
30be05e
added env var ENABLE_FILLER_PHRASES_BEFORE_TOOL_CALL
rootflo-hardik Mar 2, 2026
566a1ae
made step to 0.01 for voice provider config
rootflo-hardik Mar 2, 2026
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18 changes: 9 additions & 9 deletions wavefront/client/src/config/voice-providers.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -70,23 +70,23 @@ export const VOICE_PROVIDERS_CONFIG: VoiceProvidersConfig = {
default: 0.5,
min: 0,
max: 1,
step: 0.05,
step: 0.01,
description: 'Controls voice consistency (0-1)',
},
similarity_boost: {
type: 'number',
default: 0.75,
min: 0,
max: 1,
step: 0.05,
step: 0.01,
description: 'Enhances voice similarity (0-1)',
},
style: {
type: 'number',
default: 0.0,
min: 0,
max: 1,
step: 0.05,
step: 0.01,
description: 'Style exaggeration (0-1)',
},
use_speaker_boost: {
Expand All @@ -99,7 +99,7 @@ export const VOICE_PROVIDERS_CONFIG: VoiceProvidersConfig = {
default: 1.0,
min: 0.25,
max: 4.0,
step: 0.05,
step: 0.01,
description: 'Speech speed (0.25-4.0)',
},
},
Expand Down Expand Up @@ -155,7 +155,7 @@ export const VOICE_PROVIDERS_CONFIG: VoiceProvidersConfig = {
default: undefined,
description: 'Speech speed multiplier',
placeholder: '1.0',
step: 0.1,
step: 0.01,
},
},
},
Expand Down Expand Up @@ -183,23 +183,23 @@ export const VOICE_PROVIDERS_CONFIG: VoiceProvidersConfig = {
default: 0.0,
min: -0.75,
max: 0.75,
step: 0.05,
step: 0.01,
description: 'Voice pitch (-0.75 to 0.75)',
},
pace: {
type: 'number',
default: 1.0,
min: 0.3,
max: 3.0,
step: 0.1,
step: 0.01,
description: 'Speech pace (0.3-3.0)',
},
loudness: {
type: 'number',
default: 1.0,
min: 0.1,
max: 3.0,
step: 0.1,
step: 0.01,
description: 'Volume (0.1-3.0)',
},
enable_preprocessing: {
Expand All @@ -212,7 +212,7 @@ export const VOICE_PROVIDERS_CONFIG: VoiceProvidersConfig = {
default: 0.6,
min: 0.01,
max: 1.0,
step: 0.05,
step: 0.01,
description: 'Randomness for bulbul v3 (0.01-1.0)',
},
},
Expand Down
33 changes: 33 additions & 0 deletions wavefront/server/apps/call_processing/call_processing/constants/filler_phrases.py
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Original file line number Diff line number Diff line change
@@ -0,0 +1,33 @@
FILLER_PHRASES = {
'en': [
'Please wait a moment',
'Just a second',
'Give me a moment',
'One moment please',
],
'hi': ['कृपया एक पल प्रतीक्षा करें', 'बस एक सेकंड', 'मुझे एक पल दें', 'एक पल रुकिए'],
'ta': [
'தயவுசெய்து ஒரு நிமிடம் காத்திருக்கவும்',
'ஒரு நொடி',
'எனக்கு ஒரு நிமிடம் கொடுங்கள்',
'ஒரு நிமிடம்',
],
'te': [
'దయచేసి ఒక్క క్షణం వేచి ఉండండి',
'ఒక్క నిమిషం',
'నాకు ఒక్క క్షణం ఇవ్వండి',
'ఒక్క క్షణం దయచేసి',
],
'ml': [
'ദയവായി ഒരു നിമിഷം കാത്തിരിക്കൂ',
'ഒരു സെക്കൻഡ്',
'എനിക്ക് ഒരു നിമിഷം തരൂ',
'ഒരു നിമിഷം ദയവായി',
],
'kn': [
'ದಯವಿಟ್ಟು ಒಂದು ಕ್ಷಣ ಕಾಯಿರಿ',
'ಒಂದು ಕ್ಷಣ',
'ನನಗೆ ಒಂದು ಕ್ಷಣ ನೀಡಿ',
'ಒಂದು ಕ್ಷಣ ದಯವಿಟ್ಟು',
],
}
22 changes: 22 additions & 0 deletions wavefront/server/apps/call_processing/call_processing/services/pipecat_service.py
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Original file line number Diff line number Diff line change
Expand Up @@ -6,6 +6,8 @@

from typing import Dict, Any, List
from copy import deepcopy
import os
import random
from call_processing.log.logger import logger
from call_processing.services.tool_wrapper_service import ToolWrapperFactory
from call_processing.utils import get_current_ist_time_str
Expand Down Expand Up @@ -57,6 +59,7 @@
from call_processing.constants.language_config import (
LANGUAGE_INSTRUCTIONS,
)
from call_processing.constants.filler_phrases import FILLER_PHRASES


class STTLanguageSwitcher(ParallelPipeline):
Expand Down Expand Up @@ -519,6 +522,25 @@ async def run_conversation(
task_container['task'] = task

# Register event handlers
@llm.event_handler('on_function_calls_started')
async def on_function_calls_started(service, function_calls):
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@coderabbitai coderabbitai Bot Feb 27, 2026

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⚠️ Potential issue | 🟡 Minor

Resolve unused callback parameters to keep lint clean.

Line 525 introduces service and function_calls but does not use them (Ruff ARG001).

Suggested fix 
-        async def on_function_calls_started(service, function_calls):
+        async def on_function_calls_started(_service, _function_calls):
📝 Committable suggestion

‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.

Suggested change
async def on_function_calls_started(service, function_calls):
async def on_function_calls_started(_service, _function_calls):
🧰 Tools
🪛 Ruff (0.15.2)

[warning] 525-525: Unused function argument: service

(ARG001)

[warning] 525-525: Unused function argument: function_calls

(ARG001)

🤖 Prompt for AI Agents 
Verify each finding against the current code and only fix it if needed.

In
`@wavefront/server/apps/call_processing/call_processing/services/pipecat_service.py`
at line 525, The on_function_calls_started callback defines unused parameters
`service` and `function_calls` causing ARG001; fix it by renaming the parameters
to indicate intentional unused (e.g., `_service` and `_function_calls`) or
prefixing them with underscores so the linter ignores them while keeping the
function signature (update the async def on_function_calls_started definition
accordingly).

if (
os.getenv('ENABLE_FILLER_PHRASES_BEFORE_TOOL_CALL', '').lower()
!= 'true'
):
return
# Skip filler phrase when language is switching — the TTS service's language
# may change before the queued frame is processed, causing a language mismatch error.
call_names = [fc.function_name for fc in function_calls]
if 'detect_and_switch_language' in call_names:
return
current_lang = language_state.get('current_language', 'en')
phrases = FILLER_PHRASES.get(current_lang)
if not phrases:
return
phrase = random.choice(phrases)
await task.queue_frame(TTSSpeakFrame(phrase))

@transport.event_handler('on_client_connected')
async def on_client_connected(transport, client):
logger.info(f"Client connected for agent: {agent_config['name']}")
Expand Down
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