diff --git a/scripts/download_diverse_voices.py b/scripts/download_diverse_voices.py
index 3b24fe2..0c54a8f 100644
--- a/scripts/download_diverse_voices.py
+++ b/scripts/download_diverse_voices.py
@@ -24,62 +24,62 @@ except ImportError:
     print("Install required libraries: pip install datasets soundfile")
 
 # LibriSpeech test-clean speaker metadata
-# Curated for voice diversity - different genders, tones, pacing
+# Gender verified against official SPEAKERS.TXT from OpenSLR
 # Format: speaker_id: (gender, description)
 SPEAKERS = {
-    # Female speakers (11)
-    "1089": ("female", "neutral, balanced - clear professional delivery"),
-    "1188": ("female", "warm, friendly - approachable delivery"),
+    # Female speakers (11) - verified from SPEAKERS.TXT
     "1221": ("female", "expressive, storyteller - engaging narration"),
-    "1320": ("female", "soft, gentle - calm and soothing"),
+    "1284": ("female", "clear, measured - precise enunciation"),
+    "1580": ("female", "clear narrator - smooth reading style"),
+    "2094": ("female", "warm, rich - resonant tone"),
     "3570": ("female", "bright, energetic - lively and upbeat"),
     "3575": ("female", "calm, neutral - steady and even"),
     "4446": ("female", "mature, authoritative - confident tone"),
     "4507": ("female", "young, clear - crisp enunciation"),
+    "4970": ("female", "smooth, polished - announcer style"),
     "5142": ("female", "warm, conversational - natural flow"),
     "6829": ("female", "crisp, articulate - precise diction"),
-    "6930": ("female", "smooth, polished - radio-style delivery"),
 
-    # Male speakers (10)
-    "1284": ("male", "clear, measured - precise enunciation"),
-    "1580": ("male", "clear narrator - smooth reading style"),
-    "2094": ("male", "warm baritone - rich and resonant"),
+    # Male speakers (10) - verified from SPEAKERS.TXT
+    "1089": ("male", "neutral, balanced - clear professional delivery"),
+    "1188": ("male", "warm, friendly - approachable delivery"),
+    "1320": ("male", "soft, gentle - calm and soothing"),
     "2830": ("male", "young, energetic - dynamic delivery"),
     "4077": ("male", "mature, professor - thoughtful pacing"),
-    "4970": ("male", "smooth announcer - polished delivery"),
     "5105": ("male", "neutral, clear - straightforward style"),
     "5639": ("male", "deep, dramatic - authoritative tone"),
+    "6930": ("male", "smooth, polished - radio-style delivery"),
     "7021": ("male", "light, conversational - casual tone"),
     "7176": ("male", "warm storyteller - engaging narrative"),
 }
 
 # 21 voices: gendered names that match the speaker
-# Female names for female speakers, male names for male speakers
+# Gender verified against LibriSpeech SPEAKERS.TXT
 VOICE_MAP = {
-    # Female voices (11)
-    "aria":    "1089",   # F - neutral, balanced
-    "clara":   "1188",   # F - warm, friendly
-    "elena":   "1221",   # F - expressive, storyteller
-    "grace":   "1320",   # F - soft, gentle
+    # Female voices (11) - all verified female speakers
+    "aria":    "1221",   # F - expressive, storyteller
+    "clara":   "1284",   # F - clear, measured
+    "elena":   "1580",   # F - clear narrator
+    "grace":   "2094",   # F - warm, rich
     "hazel":   "3575",   # F - calm, neutral
     "iris":    "4507",   # F - young, clear
     "luna":    "3570",   # F - bright, energetic
     "maya":    "5142",   # F - warm, conversational
     "ruby":    "4446",   # F - mature, authoritative
     "sage":    "6829",   # F - crisp, articulate
-    "sofia":   "6930",   # F - smooth, polished
+    "sofia":   "4970",   # F - smooth, polished
 
-    # Male voices (10)
+    # Male voices (10) - all verified male speakers
     "atlas":   "5639",   # M - deep, dramatic
-    "caleb":   "1284",   # M - clear, measured
+    "caleb":   "1089",   # M - neutral, balanced
     "felix":   "7021",   # M - light, conversational
     "hugo":    "7176",   # M - warm storyteller
     "jasper":  "4077",   # M - mature, professor
     "kai":     "2830",   # M - young, energetic
-    "leo":     "4970",   # M - smooth announcer
-    "marcus":  "2094",   # M - warm baritone
+    "leo":     "6930",   # M - smooth, polished
+    "marcus":  "1188",   # M - warm, friendly
     "owen":    "5105",   # M - neutral, clear
-    "theo":    "1580",   # M - clear narrator
+    "theo":    "1320",   # M - soft, gentle
 }