diff --git a/backend/app/api/notes.py b/backend/app/api/notes.py
index edf6130..b93360e 100644
--- a/backend/app/api/notes.py
+++ b/backend/app/api/notes.py
@@ -9,7 +9,7 @@ from app.core.database import get_session
 from app.core.redis import enqueue
 from app.models.notes import NoteItem, NoteAttachment
 from app.schemas.notes import NoteCreate, NoteUpdate, NoteResponse
-from app.services.media import save_image, save_audio, delete_media, ALLOWED_IMAGE_TYPES, ALLOWED_AUDIO_TYPES
+from app.services.media import save_image, save_audio, delete_media, ALLOWED_IMAGE_TYPES, ALLOWED_AUDIO_PREFIXES
 
 router = APIRouter()
 
@@ -130,10 +130,11 @@ async def add_attachment(
     if not note:
         raise HTTPException(404, "Note introuvable")
 
-    if file.content_type in ALLOWED_IMAGE_TYPES:
+    ct = (file.content_type or "").lower().split(";")[0].strip()
+    if ct in ALLOWED_IMAGE_TYPES:
         media = await save_image(file, context="note")
         file_type = "image"
-    elif file.content_type in ALLOWED_AUDIO_TYPES:
+    elif ct in ALLOWED_AUDIO_PREFIXES:
         media = await save_audio(file)
         file_type = "audio"
     else:
diff --git a/backend/app/services/media.py b/backend/app/services/media.py
index 4872e7b..c4dfb44 100644
--- a/backend/app/services/media.py
+++ b/backend/app/services/media.py
@@ -13,7 +13,7 @@ ALLOWED_IMAGE_TYPES = {
     "image/jpeg", "image/jpg", "image/png", "image/webp", "image/svg+xml",
     "image/heic", "image/heif",
 }
-ALLOWED_AUDIO_TYPES = {"audio/webm", "audio/mp4"}
+ALLOWED_AUDIO_PREFIXES = {"audio/webm", "audio/mp4", "audio/ogg", "audio/x-m4a"}
 
 MAX_ORIG_SIZE = (500, 500)
 
@@ -70,7 +70,8 @@ async def save_image(file: UploadFile, context: str = "note") -> dict:
 
 
 async def save_audio(file: UploadFile) -> dict:
-    if file.content_type not in ALLOWED_AUDIO_TYPES:
+    ct = (file.content_type or "").lower().split(";")[0].strip()
+    if ct not in ALLOWED_AUDIO_PREFIXES:
         raise HTTPException(status_code=400, detail=f"Format audio non supporté : {file.content_type}")
 
     file_id = str(uuid.uuid4())
diff --git a/frontend/src/pages/NotesPage.tsx b/frontend/src/pages/NotesPage.tsx
index a800163..1fd48db 100644
--- a/frontend/src/pages/NotesPage.tsx
+++ b/frontend/src/pages/NotesPage.tsx
@@ -41,19 +41,23 @@ function NoteCard({ note, onEdit, onDelete, onAddPhoto, onAddAudio, onDeleteAtt
   async function startRecord() {
     try {
       const stream = await navigator.mediaDevices.getUserMedia({ audio: true })
-      const recorder = new MediaRecorder(stream)
+      // Choisir le format supporté par le navigateur (Safari → mp4, Chrome/Firefox → webm)
+      const mimeType = ['audio/webm', 'audio/mp4', 'audio/ogg'].find(t => MediaRecorder.isTypeSupported(t)) ?? ''
+      const recorder = mimeType ? new MediaRecorder(stream, { mimeType }) : new MediaRecorder(stream)
       chunksRef.current = []
       recorder.ondataavailable = e => { if (e.data.size > 0) chunksRef.current.push(e.data) }
       recorder.onstop = () => {
         stream.getTracks().forEach(t => t.stop())
-        const blob = new Blob(chunksRef.current, { type: 'audio/webm' })
-        onAddAudio(new File([blob], 'enregistrement.webm', { type: 'audio/webm' }))
+        const type = recorder.mimeType || mimeType || 'audio/webm'
+        const ext = type.includes('mp4') ? 'm4a' : 'webm'
+        const blob = new Blob(chunksRef.current, { type })
+        onAddAudio(new File([blob], `enregistrement.${ext}`, { type }))
       }
       recorder.start()
       recorderRef.current = recorder
       setRecording(true)
     } catch {
-      // micro non disponible
+      // micro non disponible ou permission refusée
     }
   }
 
@@ -121,7 +125,7 @@ function NoteCard({ note, onEdit, onDelete, onAddPhoto, onAddAudio, onDeleteAtt
         {note.tags.map(t => (
           <span key={t} style={{ background: 'var(--bg-5)', color: 'var(--ink-3)', fontSize: 11, fontFamily: 'var(--font-ui)', borderRadius: 999, padding: '1px 7px' }}>{t}</span>
         ))}
-        {note.gps_lat && <span style={{ color: 'var(--ok)', fontSize: 11 }}>📍</span>}
+        {note.gps_lat != null && <i className="fa-solid fa-location-dot" style={{ color: 'var(--ok)', fontSize: 12 }} title={`${note.gps_lat?.toFixed(4)}, ${note.gps_lon?.toFixed(4)}`} />}
       </div>
 
       {/* Actions */}