diff --git a/scripts/generate_wideband_sig53.py b/scripts/generate_wideband_sig53.py
index 487eb49..4171602 100644
--- a/scripts/generate_wideband_sig53.py
+++ b/scripts/generate_wideband_sig53.py
@@ -23,8 +23,8 @@ def generate(root: str, configs: List[conf.WidebandSig53Config]):
 
         dataset_loader = DatasetLoader(
             wideband_ds,
-            num_workers=8,
-            batch_size=8,
+            num_workers=os.cpu_count() // 2,
+            batch_size=os.cpu_count() // 2,
             seed=12345678,
             collate_fn=collate_fn,
         )
@@ -45,7 +45,7 @@ def generate(root: str, configs: List[conf.WidebandSig53Config]):
     "--all", default=True, help="Generate all versions of wideband_sig53 dataset."
 )
 @click.option(
-    "--qa", default=True, help="Generate only QA versions of wideband_sig53 dataset."
+    "--qa", default=False, help="Generate only QA versions of wideband_sig53 dataset."
 )
 @click.option(
     "--impaired",
diff --git a/torchsig/datasets/sig53.py b/torchsig/datasets/sig53.py
index df8c400..9acef13 100644
--- a/torchsig/datasets/sig53.py
+++ b/torchsig/datasets/sig53.py
@@ -88,7 +88,7 @@ def __init__(
 
         self.path = self.root / cfg.name
         self.env = lmdb.Environment(
-            str(self.path).encode(), map_size=int(1e12), max_dbs=2, lock=False
+            str(self.path).encode(), map_size=int(4e12), max_dbs=2, lock=False
         )
         self.data_db = self.env.open_db(b"data")
         self.label_db = self.env.open_db(b"label")
@@ -101,7 +101,7 @@ def __len__(self) -> int:
     def __getitem__(self, idx: int) -> Tuple[np.ndarray, Any]:
         encoded_idx = pickle.dumps(idx)
         with self.env.begin(db=self.data_db) as data_txn:
-            iq_data = pickle.loads(data_txn.get(encoded_idx)).numpy()
+            iq_data = pickle.loads(data_txn.get(encoded_idx))
 
         with self.env.begin(db=self.label_db) as label_txn:
             mod, snr = pickle.loads(label_txn.get(encoded_idx))
diff --git a/torchsig/utils/writer.py b/torchsig/utils/writer.py
index aca130c..73e4dfe 100644
--- a/torchsig/utils/writer.py
+++ b/torchsig/utils/writer.py
@@ -53,10 +53,9 @@ def __init__(
             multiprocessing_context=torch.multiprocessing.get_context("fork"),
             collate_fn=collate_fn,
         )
-        self.length = int(len(dataset) / batch_size)
 
     def __len__(self):
-        return self.length
+        return len(self.loader)
 
     def __next__(self):
         data, label = next(self.loader)
@@ -98,8 +97,10 @@ def exists(self):
 
     def write(self, batch):
         data, labels = batch
-        with self.env.begin(write=True) as txn:
+        with self.env.begin() as txn:
             last_idx = txn.stat(db=self.data_db)["entries"]
+
+        with self.env.begin(write=True) as txn:
             if isinstance(labels, tuple):
                 for label_idx, label in enumerate(labels):
                     txn.put(
@@ -115,6 +116,13 @@ def write(self, batch):
                         db=self.label_db,
                     )
             for element_idx in range(len(data)):
+                if not isinstance(data[element_idx], np.ndarray):
+                    txn.put(
+                        pickle.dumps(last_idx + element_idx),
+                        pickle.dumps(data[element_idx].numpy()),
+                        db=self.data_db,
+                    )
+                    continue
                 txn.put(
                     pickle.dumps(last_idx + element_idx),
                     pickle.dumps(data[element_idx]),