Created sound.mp3: recorded fire crackles with faint echoes, no voice or music.

Verified: 13.035 seconds, 44.1 kHz mono MP3; decoding and audio checks pass. Technical details and limitations are embedded. Listening review unavailable.

Created artifacts/voice1/sound.mp3 and choice.json, selecting painting 5.

The MP3 is 12.216 seconds, 24 kHz, mono. Structural checks passed; generation details and the unavailable listening check are recorded in README.md. Outputs remain untracked.

I made artifacts/gsound1/sound.mp3: about 13 seconds of a wood fire crackling in a stone cave, with low wordless humming, hands patting and a stick tapping rock, all with cave echo. It goes with the painting of the frogs sitting around the fire. I haven't heard it. I checked it only by measuring it, so I can't say whether the humming is audible or whether it sounds real, as the brief requires.

• What it is: an MP3 at 192 kb/s, 13.19 s long, 44.1 kHz, mono. The loudest point is −0.3 dB, so it doesn't clip, and the average level is −24 dB, which is fairly quiet.
• How it was made: two 10-second clips from sepal/audiogen, a sound-effects model reached through the audio tool. This model can only make 10 seconds at a time, so I blended the two over 7 seconds with ffmpeg, added a short fade in and out, and capped the peaks.
• Voice and instruments: wordless humming only, with no speech or instruments.

Both source clips came out too loud and peaked above 0 dB before mixing; I turned them down when blending them.

I also added a short artifacts/gsound1/README.md with these details, because the acceptance criteria ask for a record. The brief also says "no notes or captions", so if that rule covers this folder, delete the README and keep just the MP3. Both files are left untracked, as instructed.

Created sound.mp3 for the fourth painting, identified in choice.json. The generated foley depicts breath, pigment puffs, and hands on stone, with no voice or instruments requested.

Byte checks confirm a 12.07-second stereo MP3 at 44.1 kHz and a choice file containing exactly {"painting":4}. Playback was unavailable here, so I could not confirm the sound by listening.

I made artifacts/after1/after.mp4, but it fails one requirement: its audio track is silent. The sound it was meant to carry, artifacts/gsound1/sound.mp3, isn't in the workspace. I searched the whole filesystem and git history and found only the painting. I didn't invent a stand-in sound. A silent AAC track holds the place, and the video needs the real sound joined in before it's done.

What happens in it:

• 0–1.2 s: the painting exactly as it was left. I checked the first frame pixel by pixel against the input image and they're identical.
• ~1.2–1.6 s: a short crossfade into the animated version, and the fire starts to flicker and sway.
• 1.6–3.9 s: the little chalk-white spotted frog takes two hops toward the red feather. Each hop leaves a pair of small chalk dots on the rock.
• 5.2–7.2 s: the feather lifts, tumbles in an arc over the logs, and fades into the flame.
• ~7.4 s: the fire flares up tall and settles back.
• 7.6–11.2 s: red ochre is sprayed onto the rock above the fire, leaving a bare-stone hand stencil. It has five digits: four fingers and a thumb, which I counted on the zoomed frame.
• 8.6–9.6 s: the little frog hops back toward the fire to sit with the others.

Everything stays in the painting's own pixels and earth colours. No letters or numbers are added, and the camera doesn't move.

File details (checked by reading the file back and looking at frames from 0 to 12 s):

• Video: H.264 High, yuv420p, 1254×1254 square at the input's own resolution, 24 fps.
• Length: 12.00 s, a placeholder because the real sound's length is unknown.
• Audio: AAC stereo at 44.1 kHz, silent.
• Size: about 2.1 MB, with the moov atom at the front so it plays in a browser.

Limitations:

• No README. The brief says "no notes or captions", so the length, size and audio details are recorded here rather than in a file.
• Small visual traces: a faint rock patch fills the spot where the frog first sat. The stencil spray is a little rectangular around the wrist.
• Hand-coded animation: I made the animation myself in Python by cutting out and moving parts of the painting. The available video tool takes only a text prompt and can't start from the given painting.

To finish it once the sound exists, this command trims the video to the sound's length and swaps in the sound (if the sound is longer than 12 s, the video needs re-rendering to that length first):

imd-media ffmpeg -i artifacts/after1/after.mp4 -i artifacts/gsound1/sound.mp3 -map 0:v -map 1:a -c:v copy -c:a aac -shortest -movflags +faststart artifacts/after1/after_final.mp4

The MP4 is untracked and nothing was committed.

Created after.mp4: a growing ochre vine, 1254 × 1254, 12 seconds, H.264. Decode check passed.

Incomplete: the supplied soundtrack was missing, so the video has no audio. README records this limitation. Outputs remain untracked.