diff --git a/driver/tef.py b/driver/tef.py
index 127e278..ad8308a 100644
--- a/driver/tef.py
+++ b/driver/tef.py
@@ -17,6 +17,7 @@ def _command_wrapper(func: Callable[Concatenate[TEF6686, P], tuple[bytes, int |
     @wraps(func)
     def inner(self: TEF6686, *args: P.args, **kwargs: P.kwargs) -> bytes | T:
         data, read_bytes, out_parser = func(self, *args, **kwargs)
+        data, read_bytes, out_parser = self._pre_command_(func, data, read_bytes, out_parser)
 
         if read_bytes: data = self.p.write_read_i2c(self.address, data, read_bytes)
         else: data = self.p.write_i2c(self.address, data)
@@ -33,6 +34,8 @@ def pack(*values: int | SignedInt):
     return struct.pack(struct_string, *values)
 
 class TEF6686(BaseTEF668X):
+    def _pre_command_(self, wrap: Callable, data: bytes, read_bytes: int | None, out_parser: Callable | None): return data, read_bytes, out_parser
+
     class TuneTo_Mode(Enum):
         Preset = 1
         Search = 2
@@ -333,6 +336,7 @@ def _7_command_wrapper(func: Callable[Concatenate[TEF6687, P], tuple[bytes, int
     @wraps(func)
     def inner(self: TEF6687, *args: P.args, **kwargs: P.kwargs) -> bytes | T:
         data, read_bytes, out_parser = func(self, *args, **kwargs)
+        data, read_bytes, out_parser = self._pre_command_(func, data, read_bytes, out_parser)
 
         if read_bytes: data = self.p.write_read_i2c(self.address, data, read_bytes)
         else: data = self.p.write_i2c(self.address, data)
@@ -364,6 +368,7 @@ def _8_command_wrapper(func: Callable[Concatenate[TEF6688, P], tuple[bytes, int
     @wraps(func)
     def inner(self: TEF6688, *args: P.args, **kwargs: P.kwargs) -> bytes | T:
         data, read_bytes, out_parser = func(self, *args, **kwargs)
+        data, read_bytes, out_parser = self._pre_command_(func, data, read_bytes, out_parser)
 
         if read_bytes: data = self.p.write_read_i2c(self.address, data, read_bytes)
         else: data = self.p.write_i2c(self.address, data)
diff --git a/xrd.py b/xrd.py
index 012919a..8284454 100644
--- a/xrd.py
+++ b/xrd.py
@@ -46,7 +46,7 @@ def init_tef():
     tef = TEF6686(p)
     tef.init(clock=CLOCK)
     tef.AUDIO_Set_Mute(False)
-    tef.AUDIO_Set_Volume(30)
+    tef.AUDIO_Set_Volume(20)
     tef.FM_Tune_To(TEF6686.TuneTo_Mode.Preset, INITIAL_FREQ)
     tef.FM_Set_RDS(1)
     tef.FM_Set_ChannelEqualizer(INITIAL_EQ)
@@ -202,19 +202,19 @@ def send_rds_data(tef: TEF6686, conn: socket.socket, state: dict):
     data = b""
     if (status & (1 << 13) == 0):
         err = 0
-        err |= ((dec_error >> 8) & 0x30) >> 4
-        err |= ((dec_error >> 8) & 0xC)
-        err |= ((dec_error >> 8) & 3) << 4
+        err |= (dec_error & 0x30) >> 4
+        err |= (dec_error & 0xC)
+        err |= (dec_error & 3) << 4
 
         data = b"R"
         data += f"{B:04X}{C:04X}{D:04X}{err:02X}\n".encode()
 
-    pi_error = (dec_error >> 14) & 0b11
+    pi_error = (dec_error >> 8) & 0b11
     if pi_error < 3:
         data += b"P" + f"{A:04X}".encode()
         data += b"?" * pi_error + b"\n"
     elif status & (1 << 12):
-        pi_error = (dec_error >> 10) & 0b11
+        pi_error = (dec_error >> 2) & 0b11
         if pi_error < 3:
             data += b"P" + f"{C:04X}".encode()
             data += b"?" * pi_error + b"\n"