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fix: force narrowband slin on AI audiosocket channel
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AudioSocket was delivering 16kHz audio despite the telecom-kz trunk being
codec-restricted to alaw/ulaw, causing the 8k->16k ASR resample to double
an already-16kHz stream to an effective 32kHz labeled as 16000 Hz -
audible as slow, deep-pitched, unintelligible speech. Force
audioread/writeformat=slin before AudioSocket() so the channel always
delivers narrowband 8kHz, matching every rate assumption in the runtime.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
This commit is contained in:
didar
2026-08-23 15:42:01 +05:00
co-authored by Claude Sonnet 5
parent c590528694
commit 75d9ed85a7
1 changed files with 2 additions and 0 deletions
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deployment/asterisk/extensions.conf
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@@ -28,6 +28,8 @@ exten => ai-reuse,1,NoOp(MVPCC AI handoff reusing active IVR call)
exten => ai-audiosocket,1,NoOp(MVPCC AI audio bridge start)
same => n,GotoIf($["${MVPCC_AI_AUDIOSOCKET_SERVICE}" = ""]?ai-human-fallback,1)
same => n,Set(CHANNEL(audioreadformat)=slin)
same => n,Set(CHANNEL(audiowriteformat)=slin)
same => n,Set(MVPCC_MEDIA_UUID=${SHELL(uuidgen | tr -d '\r\n')})
same => n,UserEvent(MVPCCAIAudioBridgeRequested,CallID:${MVPCC_CALL_ID},LinkedID:${MVPCC_LINKED_ID},QueueCode:${MVPCC_QUEUE},Extension:${MVPCC_ENTRY_EXTENSION},Context:${CONTEXT},MediaUUID:${MVPCC_MEDIA_UUID},UuidLen:${LEN(${MVPCC_MEDIA_UUID})},AudioSocketService:${MVPCC_AI_AUDIOSOCKET_SERVICE},Channel:${CHANNEL})
same => n,UserEvent(MVPCCAIAudioSocketAttempt,CallID:${MVPCC_CALL_ID},LinkedID:${MVPCC_LINKED_ID},QueueCode:${MVPCC_QUEUE},Extension:${MVPCC_ENTRY_EXTENSION},Context:${CONTEXT},MediaUUID:${MVPCC_MEDIA_UUID},UuidLen:${LEN(${MVPCC_MEDIA_UUID})},AudioSocketService:${MVPCC_AI_AUDIOSOCKET_SERVICE},Channel:${CHANNEL})