Daily Digest Podcast - PRD & Roadmap

Current State

✅ DONE - What's Built & Working

TTS Generation:

Provider: macOS say (built-in, no external API)
Converts blog content to speech

Audio Mixing:

Music plays at 12% volume UNDER speech (continuous bed)
Music fades in at start (30%), fades out at end
Works reliably with ffmpeg

Files:

Intro: blog-creator/public/podcast-audio/intro.mp3 (71 sec)
Outro: blog-creator/public/podcast-audio/outro.mp3 (34 sec)

Tested: Audio generates successfully with music bed!

Configuration

# blog-backup .env.local
ENABLE_TTS=true
TTS_PROVIDER=macsay
ENABLE_PODCAST_MUSIC=true
INTRO_MUSIC_URL=/path/to/intro.mp3
OUTRO_MUSIC_URL=/path/to/outro.mp3

What's Left to Do

1. Integrate TTS into Daily Digest Cron

7am cron creates digest but doesn't auto-generate audio
Need to add TTS call to workflow

2. Pre-slice Intro/Outro (Optional Enhancement)

Create 5-10 sec intro clip (currently using full 71 sec as bed)
Create 5-10 sec outro clip
This would enable distinct intro/speech/outro segments

3. Transition Sounds (Optional)

Add brief music bump between stories
Requires pre-sliced clips

Documentation

Full audio mixing docs: ~/.openclaw/workspace/docs/AUDIO_MIXING.md

Test Result

Working audio generated:

URL: https://qnatchrjlpehiijwtreh.supabase.co/storage/v1/object/public/podcast-audio/tts-xxx.mp3
Duration: ~120 seconds (matches speech length)
Sound: Speech with background music bed throughout

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