fix: update DiffRhythm workflows with correct node names and parameters

Updated all 4 DiffRhythm workflow JSON files to use actual node class names from ComfyUI_DiffRhythm:

**Node Name Changes:**
- DiffRhythmTextToMusic → DiffRhythmRun
- DiffRhythmRandomGeneration → DiffRhythmRun (with empty style_prompt)
- DiffRhythmReferenceBasedGeneration → DiffRhythmRun (with audio input)

**Corrected Parameter Structure:**
All workflows now use proper widgets_values array matching DiffRhythmRun INPUT_TYPES:
1. model (string: "cfm_model_v1_2.pt", "cfm_model.pt", or "cfm_full_model.pt")
2. style_prompt (string: multiline text or empty for random)
3. unload_model (boolean: default true)
4. odeint_method (string: "euler", "midpoint", "rk4", "implicit_adams")
5. steps (int: 1-100, default 30)
6. cfg (int: 1-10, default 4)
7. quality_or_speed (string: "quality" or "speed")
8. seed (int: -1 for random, or specific number)
9. edit (boolean: default false)
10. edit_segments (string: "[-1, 20], [60, -1]")

**Workflow-Specific Updates:**

**diffrhythm-simple-t2m-v1.json:**
- Text-to-music workflow for 95s generation
- Uses cfm_model_v1_2.pt with text prompt guidance
- Default settings: steps=30, cfg=4, speed mode, seed=42

**diffrhythm-full-length-t2m-v1.json:**
- Full-length 4m45s (285s) generation
- Uses cfm_full_model.pt for extended compositions
- Quality mode enabled for better results
- Default seed=123

**diffrhythm-reference-based-v1.json:**
- Reference audio + text prompt workflow
- Uses LoadAudio node connected to style_audio_or_edit_song input
- Higher cfg=5 for stronger prompt adherence
- Demonstrates optional audio input connection

**diffrhythm-random-generation-v1.json:**
- Pure random generation (no prompt/guidance)
- Empty style_prompt string
- Minimal cfg=1 for maximum randomness
- Random seed=-1 for unique output each time

**Documentation Updates:**
- Removed PLACEHOLDER notes
- Updated usage sections with correct parameter descriptions
- Added notes about optional MultiLineLyricsDR node for lyrics
- Clarified parameter behavior and recommendations

These workflows are now ready to use in ComfyUI with the installed DiffRhythm extension.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

comfyui/workflows/text-to-music/diffrhythm-random-generation-v1.json

@@ -4,9 +4,9 @@
   "nodes": [
     {
       "id": 1,
-      "type": "DiffRhythmRandomGeneration",
+      "type": "DiffRhythmRun",
       "pos": [100, 100],
-      "size": [400, 250],
+      "size": [400, 400],
       "flags": {},
       "order": 0,
       "mode": 0,
@@ -14,15 +14,23 @@
         {
           "name": "AUDIO",
           "type": "AUDIO",
-          "links": [1]
+          "links": [1, 2]
         }
       ],
-      "properties": {},
+      "properties": {
+        "Node name for S&R": "DiffRhythmRun"
+      },
       "widgets_values": [
-        95.0,
+        "cfm_model_v1_2.pt",
+        "",
+        true,
+        "euler",
+        30,
+        1,
+        "speed",
         -1,
-        "cfm_model_v1_2",
-        "auto"
+        false,
+        "[-1, 20], [60, -1]"
       ],
       "title": "DiffRhythm Random Generation (No Prompt)"
     },
@@ -41,7 +49,9 @@
           "link": 1
         }
       ],
-      "properties": {},
+      "properties": {
+        "Node name for S&R": "PreviewAudio"
+      },
       "title": "Preview Audio"
     },
     {
@@ -59,7 +69,9 @@
           "link": 2
         }
       ],
-      "properties": {},
+      "properties": {
+        "Node name for S&R": "SaveAudio"
+      },
       "widgets_values": [
         "diffrhythm_random_output"
       ],
@@ -88,10 +100,15 @@
         "system_deps": ["espeak-ng"]
       },
       "usage": {
-        "duration": "Fixed at 95 seconds for DiffRhythm 1.2 model",
-        "seed": "-1 (random seed each generation) or specific number for reproducibility",
-        "model": "cfm_model_v1_2 (DiffRhythm 1.2)",
-        "device": "auto (automatic GPU selection)",
+        "model": "cfm_model_v1_2.pt (DiffRhythm 1.2 - 95s generation)",
+        "style_prompt": "Empty string for random generation (no guidance)",
+        "unload_model": "Boolean to unload model after generation (default: true)",
+        "odeint_method": "ODE solver: euler (default)",
+        "steps": "Number of diffusion steps: 30 (default)",
+        "cfg": "Classifier-free guidance: 1 (minimal guidance for random output)",
+        "quality_or_speed": "Generation mode: speed (default)",
+        "seed": "-1 for random seed each generation, or specific number for reproducibility",
+        "edit": "false (no editing)",
         "note": "NO prompt, NO guidance, NO reference audio - pure random generation"
       },
       "use_cases": [
@@ -106,16 +123,18 @@
         "Use seed=-1 for completely random output each time",
         "Use fixed seed to reproduce interesting random results",
         "Batch process: Run 10-20 times to find interesting compositions",
-        "Save any interesting results with their seed numbers"
+        "Save any interesting results with their seed numbers",
+        "Empty style_prompt with cfg=1 produces truly random output"
       ],
       "notes": [
         "This workflow demonstrates DiffRhythm's ability to generate music without any input",
-        "All DiffRhythm parameters are optional - this is the ultimate proof",
+        "All DiffRhythm parameters except model are at their most permissive settings",
+        "Empty string for style_prompt means no guidance from text",
+        "cfg=1 provides minimal guidance, maximizing randomness",
         "Results can range from ambient to energetic, classical to electronic",
         "Each generation is unique (with seed=-1)",
         "Generation time: ~30-60 seconds on RTX 4090",
-        "Perfect for discovering unexpected musical combinations",
-        "PLACEHOLDER: Actual node names and parameters need to be updated after ComfyUI_DiffRhythm installation"
+        "Perfect for discovering unexpected musical combinations"
       ]
     }
   },