Document 50-step default for XL Base

README.md

@@ -46,7 +46,7 @@ output = pipe(
     prompt="An upbeat synthwave track with driving drums and a catchy lead",
     lyrics="[Verse]\nNeon lights are calling me\n[Chorus]\nRide the wave tonight",
     audio_duration=30.0,
-    num_inference_steps=8,
+    num_inference_steps=50,
     guidance_scale=7.0,
     shift=3.0,
     generator=torch.Generator(device="cuda").manual_seed(42),
@@ -56,7 +56,7 @@ audio = output.audios[0]  # (channels, samples), 48 kHz
 sf.write("acestep-xl-base.wav", audio.T.cpu().float().numpy(), pipe.sample_rate)
 ```
 
-Unlike the turbo checkpoint, XL Base is not guidance-distilled. The pipeline uses ACE-Step's APG guidance path when `guidance_scale > 1.0`; `guidance_scale=7.0` and `shift=3.0` are the recommended defaults. You can increase `num_inference_steps` for slower, higher-quality sampling.
+Unlike the turbo checkpoint, XL Base is not guidance-distilled. The pipeline uses ACE-Step's APG guidance path when `guidance_scale > 1.0`; `num_inference_steps=50`, `guidance_scale=7.0`, and `shift=3.0` are the recommended defaults. Pass `num_inference_steps=50` explicitly so generation does not use the lower-step turbo setting.
 
 For batched prompts with padding and FlashAttention, use the variable-length backend: