Quickstart

set -euo pipefail

# Export DUETA_API_KEY once in your shell (Authenticate). This reads it.
: "${DUETA_API_KEY:?export DUETA_API_KEY first}"
BASE="https://dueta.ai"
AUTH="Authorization: Bearer $DUETA_API_KEY"

# 1. Declare the recording, then send its bytes.
SIZE=$(wc -c < song.wav)
UPLOAD=$(curl -sS -X POST -H "$AUTH" -H "Content-Type: application/json" \
  -d "{\"filename\": \"song.wav\", \"size_bytes\": $SIZE}" \
  "$BASE/v1/uploads")
UPLOAD_ID=$(echo "$UPLOAD" | jq -er .id) || { echo "$UPLOAD"; exit 1; }

curl -fsS -X PUT -H "$AUTH" -H "Content-Type: application/octet-stream" \
  --data-binary @song.wav "$BASE/v1/uploads/$UPLOAD_ID/content" |
    jq -e '.state == "ready"'   # stops here unless the bytes landed

# 2. Create the job.
JOB=$(curl -sS -X POST -H "$AUTH" -H "Content-Type: application/json" \
  -d "{\"inputs\": [\"$UPLOAD_ID\"]}" "$BASE/v1/jobs/music-separation")
JOB_ID=$(echo "$JOB" | jq -er .id) || { echo "$JOB"; exit 1; }   # an error body (credit, limits) has no id

# 3. Poll until it is done.
while :; do
  JOB=$(curl -sS -H "$AUTH" "$BASE/v1/jobs/$JOB_ID")
  case "$(echo "$JOB" | jq -r .status)" in
    succeeded) break ;;
    queued|running) sleep 5 ;;
    failed|canceled) echo "$JOB" | jq -r .error; exit 1 ;;
    *) echo "$JOB"; exit 1 ;;   # not a job at all: an error body
  esac
done

# 4. One stem per part of the song.
for NAME in $(echo "$JOB" | jq -r '.result.stems[].name'); do
  curl -fsSL -H "$AUTH" -o "$NAME.wav" "$BASE/v1/jobs/$JOB_ID/stems/$NAME"
done