add: absorb soprano_to_rvc as regular subdirectory

Voice conversion pipeline (Soprano TTS → RVC) with Docker support.
Previously tracked as bare gitlink; removed .git/ directories and
absorbed into main repo for unified tracking.

Includes: Soprano TTS, RVC WebUI integration, Docker configs,
WebSocket API, and benchmark scripts.
Updated .gitignore to exclude large model weights (*.pth, *.pt, *.onnx, *.index).
287 files (3.1GB of ML weights properly excluded via gitignore).

soprano_to_rvc/docker-compose.yml

@@ -0,0 +1,77 @@
+version: '3.8'
+
+services:
+  # Soprano TTS Server (NVIDIA GTX 1660 + CUDA)
+  soprano:
+    build:
+      context: .
+      dockerfile: Dockerfile.soprano
+    container_name: miku-soprano-tts
+    runtime: nvidia
+    environment:
+      - NVIDIA_VISIBLE_DEVICES=0  # GTX 1660
+      - CUDA_VISIBLE_DEVICES=0
+    networks:
+      - miku-voice
+    deploy:
+      resources:
+        reservations:
+          devices:
+            - driver: nvidia
+              device_ids: ['0']  # GTX 1660
+              capabilities: [gpu]
+    restart: unless-stopped
+    healthcheck:
+      test: ["CMD", "python3", "-c", "import zmq; ctx = zmq.Context(); s = ctx.socket(zmq.REQ); s.connect('tcp://localhost:5555'); s.close()"]
+      interval: 30s
+      timeout: 10s
+      start_period: 60s
+      retries: 3
+
+  # RVC API Server (AMD RX 6800 + ROCm)
+  rvc:
+    build:
+      context: .
+      dockerfile: Dockerfile.rvc
+    container_name: miku-rvc-api
+    command: ["python", "soprano_rvc_api.py"]
+    volumes:
+      - /opt/rocm:/opt/rocm:ro  # Mount host ROCm (read-only)
+    devices:
+      - /dev/kfd:/dev/kfd
+      - /dev/dri:/dev/dri
+    group_add:
+      - "989"  # render group (for /dev/dri access)
+      - "985"  # video group
+    cap_add:
+      - SYS_PTRACE
+    security_opt:
+      - seccomp:unconfined
+    environment:
+      - HSA_OVERRIDE_GFX_VERSION=10.3.0  # For RX 6800 (gfx1030)
+      - HSA_FORCE_FINE_GRAIN_PCIE=1
+      - SOPRANO_SERVER=tcp://soprano:5555
+      - ROCR_VISIBLE_DEVICES=0
+      - GPU_DEVICE=cuda  # Force RVC to use 'cuda' device name for ROCm
+      - DISABLE_ADDONS=1  # Disable fairseq/apex addons to avoid C++ extension issues
+      - LD_LIBRARY_PATH=/opt/rocm/lib:/opt/rocm/lib64:$LD_LIBRARY_PATH
+      - PATH=/opt/rocm/bin:$PATH
+    ports:
+      - "8765:8765"  # Expose HTTP API externally
+    networks:
+      - miku-voice
+    depends_on:
+      soprano:
+        condition: service_healthy
+    restart: unless-stopped
+    healthcheck:
+      test: ["CMD", "curl", "-f", "http://localhost:8765/health"]
+      interval: 30s
+      timeout: 10s
+      start_period: 120s
+      retries: 3
+
+networks:
+  miku-voice:
+    name: miku-voice-network
+    driver: bridge