MSL · compose
Upload a Sound Postcard MP4 exported from the iOS app. Metadata (title, location, tags) is read from the file and auto-included as hashtags.
Sound Postcard video
In MSL on iPhone or iPad: pick a recording → Share → Sound Postcard video → choose a template → Generate → save MP4 to Files / AirDrop to Mac. Then drop it here.
Caption (optional)
Upload a photo, type a title + location, see a live polaroid preview, publish as a Facebook photo post. The brand suffix is auto-appended to the post body the same way as the Basic flow.
Photo (required)
Sound (required)
The polaroid and the sound get bundled into an MP4 that publishes as a Facebook video. Sound is the whole point of MSL — both fields are needed before Publish unlocks.
Card text
Preview
What gets uploaded to Facebook.
No photo selected yet.