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Voice, announcements, and TTS

Configuration files

adn-voice.yaml (optional, not committed) — merged into config["VOICE"].
Hot reload on file mtime (~15 s loop).

Template: adn-voice.example.yaml.

Server voice identity (configurable `DMR_ID`)

All server-originated voice uses a configurable DMR ID in adn-voice.yaml:

VOICE:
  DMR_ID: 1000001        # optional; default 1000001

  TTS_ANNOUNCEMENTS:
    - ENABLED: true
      FILE: texto1
      TG: 730500
      DMR_ID: 3109898    # optional; inherits VOICE.DMR_ID when omitted

VOICE.DMR_ID — default RF source. Optional — existing adn-voice.yaml files need no change.
Per-item DMR_ID — override on each ANNOUNCEMENTS / TTS_ANNOUNCEMENTS row. Also optional.
Callsign — resolved from the subscriber DB (users / SUB_MAP) for that DMR ID; not in voice config.

Applies to:

Scheduled ANNOUNCEMENTS and TTS_ANNOUNCEMENTS (destination = the TG field in each item).
On-demand clips triggered by dialling 9991–9999 (playback uses destination TG 9 on TS2; you still key 999x to request the file).
Disconnected / reflector voice lines (same: TG 9 / TS2).

See TG 9 — local service lane for why TG 9 is used and what must be enabled on the hotspot.

Voice ident (destination all-call or OVERRIDE_IDENT_TG).

See Special numbers — server voice source ID for the full table.

Features

Feature	Description
Scheduled announcements	AMBE phrases from `Audio/<lang>/ondemand/` on a schedule (hourly / interval).
TTS announcements	Text → gTTS → MP3 → ffmpeg → WAV → vocoder → AMBE (see pipeline below).
Voice ident	Periodic identification (optional); uses `VOICE_IDENT` in main server config and `OVERRIDE_IDENT_TG` / all-call.
Recording	When enabled, records AMBE to disk for traffic on `RECORDING_TG` / `RECORDING_TIMESLOT` (see template `adn-voice.example.yaml`).
On-demand (9991–9999)	See Special numbers.

TTS pipeline (summary)

Source text in .txt under Audio/<language>/ondemand/.
gTTS produces MP3.
ffmpeg converts to WAV.
Vocoder command or AMBEServer produces AMBE for transmission.

ffmpeg must be installed on the host OS.

Configure TTS_VOCODER_CMD or TTS_AMBESERVER_HOST / TTS_AMBESERVER_PORT in adn-voice.yaml for encoding; see comments in adn-voice.example.yaml.

Anti-collision (QSO) with announcements

When scheduling announcements, the server may wait if target slots are busy, drop targets if a live QSO appears mid-stream, and only mark hourly announcement state after a successful target list — this avoids clobbering live traffic.

Scheduled and TTS broadcasts inject each frame as a synthetic hotspot PTT on PROXY.TARGET_SYSTEM (the same MASTER used by the integrated proxy). Routing fans out to bridged hotspots and OPENBRIDGE legs; local peers on that MASTER still receive frames via send_system.

Broadcast queue

Parallel broadcasts on different TGs may run concurrently; same-TG broadcasts are serialised so one announcement completes before another on that TG.

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