add max phones env var

libritts-aligned.py

@@ -24,6 +24,7 @@ _PHONESET = "arpabet"
 _VERBOSE = os.environ.get("LIBRITTS_VERBOSE", True)
 _MAX_WORKERS = os.environ.get("LIBRITTS_MAX_WORKERS", cpu_count())
 _MAX_WORKERS = int(_MAX_WORKERS)
+_MAX_PHONES = os.environ.get("LIBRITTS_MAX_PHONES", 512)
 _PATH = os.environ.get("LIBRITTS_PATH", os.environ.get("HF_DATASETS_CACHE", None))
 _DOWNLOAD_SPLITS = os.environ.get(
     "LIBRITTS_DOWNLOAD_SPLITS",
@@ -343,7 +344,7 @@ class LibriTTSAlign(datasets.GeneratorBasedBuilder):
         for i, row in ds.iterrows():
             # 10kB is the minimum size of a wav file for our purposes
             if Path(row["audio"]).stat().st_size >= 10_000:
-                if len(row["phones"]) < 384:
+                if len(row["phones"]) < _MAX_PHONES:
                     result = {
                         "id": row["basename"],
                         "speaker": row["speaker"],