fixes regression in apply()

patch bump

.gitignore

@@ -159,3 +159,5 @@ config.toml
 vban.toml
 
 .vscode/
+
+PING_FEATURE.md

CHANGELOG.md

@@ -11,6 +11,16 @@ Before any major/minor/patch bump all unit tests will be run to verify they pass
 
 -   [x]
 
+## [2.9.0] - 2026-03-02
+
+### Added
+
+-   Recorder class, see [Recorder](https://github.com/onyx-and-iris/vban-cmd-python?tab=readme-ov-file#recorder) in README.
+-   Ping/pong implemented. If a pong is not received {VbanCmd}.login() will fail fast. This prevents the rt listener threads from starting up.
+    -   It has the added benefit of automatically detecting the type of VBAN server (Voicemeeter or Matrix).
+-   A thread lock around the framecounter to improve thread safety since it can be accessed by both the main thread and the Producer thread.
+
+
 ## [2.7.0] - 2026-03-01
 
 ### Added

README.md

@@ -41,14 +41,14 @@ Load VBAN connection info from toml config. A valid `vban.toml` might look like
 
 ```toml
 [connection]
-ip = "gamepc.local"
+host = "localhost"
 port = 6980
 streamname = "Command1"
 ```
 
 It should be placed in \<user home directory\> / "Documents" / "Voicemeeter" / "configs"
 
-Alternatively you may pass `ip`, `port`, `streamname` as keyword arguments.
+Alternatively you may pass `host`, `port`, `streamname` as keyword arguments.
 
 #### `__main__.py`
 
@@ -85,7 +85,7 @@ def main():
     KIND_ID = 'banana'
 
     with vban_cmd.api(
-        KIND_ID, ip='gamepc.local', port=6980, streamname='Command1'
+        KIND_ID, host='localhost', port=6980, streamname='Command1'
     ) as vban:
         do = ManyThings(vban)
         do.things()
@@ -474,7 +474,7 @@ example:
 import vban_cmd
 
 opts = {
-    'ip': '<ip address>',
+    'host': '<ip address>',
     'streamname': 'Command1',
     'port': 6980,
 }
@@ -541,14 +541,15 @@ print(vban.event.get())
 
 You may pass the following optional keyword arguments:
 
--   `ip`: str='localhost', ip or hostname of remote machine
+-   `host`: str='localhost', ip or hostname of remote machine
 -   `port`: int=6980, vban udp port of remote machine.
 -   `streamname`: str='Command1', name of the stream to connect to.
 -   `bps`: int=256000, bps rate of the stream.
 -   `channel`: int=0, channel on which to send the UDP requests.
 -   `pdirty`: boolean=False, parameter updates
 -   `ldirty`: boolean=False, level updates
--   `timeout`: int=5, amount of time (seconds) to wait for an incoming RT data packet (parameter states).
+-   `script_ratelimit`: float=0.05, default to 20 script requests per second. This affects vban.sendtext() specifically.
+-   `timeout`: int=5, timeout for socket operations.
 -   `disable_rt_listeners`: boolean=False, set `True` if you don't wish to receive RT packets.
     -   You can still send Matrix string requests ending with `?` and receive a response.
 
@@ -591,7 +592,7 @@ import vban_cmd
 
 logging.basicConfig(level=logging.DEBUG)
 
-opts = {'ip': 'ip.local', 'port': 6980, 'streamname': 'Command1'}
+opts = {'host': 'localhost', 'port': 6980, 'streamname': 'Command1'}
 with vban_cmd.api('banana', **opts) as vban:
     ...
 ```

pyproject.toml

@@ -1,6 +1,6 @@
 [project]
 name = "vban-cmd"
-version = "2.8.1"
+version = "2.9.2"
 description = "Python interface for the VBAN RT Packet Service (Sendtext)"
 authors = [{ name = "Onyx and Iris", email = "code@onyxandiris.online" }]
 license = { text = "MIT" }

uv.lock

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+    { url = "https://files.pythonhosted.org/packages/fd/33/62bd6152c8bdd4c305ad9faca48f51d3acb2df1f8791b1477d46ff86e7f8/tomli-2.4.0-cp314-cp314t-manylinux2014_x86_64.manylinux_2_17_x86_64.manylinux_2_28_x86_64.whl", hash = "sha256:0e0fe8a0b8312acf3a88077a0802565cb09ee34107813bba1c7cd591fa6cfc8d", size = 276515, upload-time = "2026-01-11T11:22:30.327Z" },
+    { url = "https://files.pythonhosted.org/packages/4b/ff/ae53619499f5235ee4211e62a8d7982ba9e439a0fb4f2f351a93d67c1dd2/tomli-2.4.0-cp314-cp314t-musllinux_1_2_aarch64.whl", hash = "sha256:413540dce94673591859c4c6f794dfeaa845e98bf35d72ed59636f869ef9f86f", size = 273806, upload-time = "2026-01-11T11:22:32.56Z" },
+    { url = "https://files.pythonhosted.org/packages/47/71/cbca7787fa68d4d0a9f7072821980b39fbb1b6faeb5f5cf02f4a5559fa28/tomli-2.4.0-cp314-cp314t-musllinux_1_2_x86_64.whl", hash = "sha256:0dc56fef0e2c1c470aeac5b6ca8cc7b640bb93e92d9803ddaf9ea03e198f5b0b", size = 281340, upload-time = "2026-01-11T11:22:33.505Z" },
+    { url = "https://files.pythonhosted.org/packages/f5/00/d595c120963ad42474cf6ee7771ad0d0e8a49d0f01e29576ee9195d9ecdf/tomli-2.4.0-cp314-cp314t-win32.whl", hash = "sha256:d878f2a6707cc9d53a1be1414bbb419e629c3d6e67f69230217bb663e76b5087", size = 108106, upload-time = "2026-01-11T11:22:34.451Z" },
+    { url = "https://files.pythonhosted.org/packages/de/69/9aa0c6a505c2f80e519b43764f8b4ba93b5a0bbd2d9a9de6e2b24271b9a5/tomli-2.4.0-cp314-cp314t-win_amd64.whl", hash = "sha256:2add28aacc7425117ff6364fe9e06a183bb0251b03f986df0e78e974047571fd", size = 120504, upload-time = "2026-01-11T11:22:35.764Z" },
+    { url = "https://files.pythonhosted.org/packages/b3/9f/f1668c281c58cfae01482f7114a4b88d345e4c140386241a1a24dcc9e7bc/tomli-2.4.0-cp314-cp314t-win_arm64.whl", hash = "sha256:2b1e3b80e1d5e52e40e9b924ec43d81570f0e7d09d11081b797bc4692765a3d4", size = 99561, upload-time = "2026-01-11T11:22:36.624Z" },
+    { url = "https://files.pythonhosted.org/packages/23/d1/136eb2cb77520a31e1f64cbae9d33ec6df0d78bdf4160398e86eec8a8754/tomli-2.4.0-py3-none-any.whl", hash = "sha256:1f776e7d669ebceb01dee46484485f43a4048746235e683bcdffacdf1fb4785a", size = 14477, upload-time = "2026-01-11T11:22:37.446Z" },
+]
+
+[[package]]
+name = "vban-cmd"
+version = "2.9.1"
+source = { editable = "." }
+dependencies = [
+    { name = "tomli", marker = "python_full_version < '3.11'" },
+]
+
+[package.metadata]
+requires-dist = [{ name = "tomli", marker = "python_full_version < '3.11'", specifier = ">=2.0.1,<3.0" }]

vban_cmd/factory.py

@@ -84,18 +84,20 @@ class FactoryBase(VbanCmd):
 
     def __init__(self, kind_id: str, **kwargs):
         defaultkwargs = {
-            'ip': 'localhost',
+            'host': 'localhost',
             'port': 6980,
             'streamname': 'Command1',
             'bps': 256000,
             'channel': 0,
-            'ratelimit': 0.01,
+            'script_ratelimit': 0.05,  # 20 commands per second, to avoid overloading Voicemeeter
-            'timeout': 5,
+            'timeout': 5,  # timeout on socket operations, in seconds
             'disable_rt_listeners': False,
             'sync': False,
             'pdirty': False,
             'ldirty': False,
         }
+        if 'ip' in kwargs:
+            defaultkwargs['host'] = kwargs.pop('ip')  # for backwards compatibility
         if 'subs' in kwargs:
             defaultkwargs |= kwargs.pop('subs')  # for backwards compatibility
         kwargs = defaultkwargs | kwargs

vban_cmd/iremote.py

@@ -1,6 +1,5 @@
 import abc
 import logging
-import time
 from dataclasses import dataclass
 
 logger = logging.getLogger(__name__)
@@ -123,6 +122,8 @@ class IRemote(abc.ABC):
     def apply(self, data):
         """Sets all parameters of a dict for the channel."""
 
+        script = ''
+
         def fget(attr, val):
             if attr == 'mode':
                 return (f'mode.{val}', 1)
@@ -138,14 +139,9 @@ class IRemote(abc.ABC):
                         val = 1 if val else 0
 
                     self._remote.cache[self._cmd(attr)] = val
-                    self._remote._script += f'{self._cmd(attr)}={val};'
+                    script += f'{self._cmd(attr)}={val};'
             else:
                 target = getattr(self, attr)
                 target.apply(val)
 
-        self._remote.sendtext(self._remote._script)
+        self._remote.sendtext(script)
-        return self
-
-    def then_wait(self):
-        self._remote._script = str()
-        time.sleep(self._remote.DELAY)

vban_cmd/packet/headers.py

@@ -8,11 +8,15 @@ VBAN_PROTOCOL_SERVICE = 0x60
 
 VBAN_SERVICE_RTPACKETREGISTER = 32
 VBAN_SERVICE_RTPACKET = 33
+VBAN_SERVICE_PING = 0
+VBAN_SERVICE_PONG = 0  # PONG uses same service type as PING
 VBAN_SERVICE_MASK = 0xE0
 VBAN_PROTOCOL_MASK = 0xE0
 VBAN_SERVICE_REQUESTREPLY = 0x02
 VBAN_SERVICE_FNCT_REPLY = 0x02
 
+PINGPONG_PACKET_SIZE = 704  # Size of the PING/PONG header + payload in bytes
+
 MAX_PACKET_SIZE = 1436
 HEADER_SIZE = 4 + 1 + 1 + 1 + 1 + 16
 
@@ -207,6 +211,92 @@ class VbanMatrixResponseHeader:
         return header, payload
 
 
+@dataclass
+class VbanPingHeader:
+    """Represents the header of a PING packet"""
+
+    name: str = 'PING0'
+    format_sr: int = VBAN_PROTOCOL_SERVICE
+    format_nbs: int = 0
+    format_nbc: int = VBAN_SERVICE_PING
+    format_bit: int = 0
+    framecounter: int = 0
+
+    @property
+    def vban(self) -> bytes:
+        return b'VBAN'
+
+    @property
+    def streamname(self) -> bytes:
+        return self.name.encode('ascii')[:16].ljust(16, b'\x00')
+
+    @classmethod
+    def to_bytes(cls, framecounter: int = 0) -> bytes:
+        """Creates the PING header bytes only."""
+        header = cls(framecounter=framecounter)
+
+        data = bytearray()
+        data.extend(header.vban)
+        data.extend(header.format_sr.to_bytes(1, 'little'))
+        data.extend(header.format_nbs.to_bytes(1, 'little'))
+        data.extend(header.format_nbc.to_bytes(1, 'little'))
+        data.extend(header.format_bit.to_bytes(1, 'little'))
+        data.extend(header.streamname)
+        data.extend(header.framecounter.to_bytes(4, 'little'))
+        return bytes(data)
+
+
+@dataclass
+class VbanPongHeader:
+    """Represents the header of a PONG response packet"""
+
+    name: str = 'PING0'
+    format_sr: int = VBAN_PROTOCOL_SERVICE
+    format_nbs: int = 0
+    format_nbc: int = VBAN_SERVICE_PONG
+    format_bit: int = 0
+    framecounter: int = 0
+
+    @property
+    def vban(self) -> bytes:
+        return b'VBAN'
+
+    @property
+    def streamname(self) -> bytes:
+        return self.name.encode('ascii')[:16].ljust(16, b'\x00')
+
+    @classmethod
+    def from_bytes(cls, data: bytes):
+        """Parse a PONG response packet from bytes."""
+        parsed = _parse_vban_service_header(data)
+
+        # PONG responses use the same service type as PING (0x00)
+        # and are identified by having payload data
+        if parsed['format_nbc'] != VBAN_SERVICE_PONG:
+            raise ValueError(f'Not a PONG response packet: {parsed["format_nbc"]:02x}')
+
+        return cls(**parsed)
+
+    @classmethod
+    def is_pong_response(cls, data: bytes) -> bool:
+        """Check if packet is a PONG response by analyzing the actual response format."""
+        try:
+            parsed = _parse_vban_service_header(data)
+
+            # Validate this is a service protocol packet with PING/PONG service type
+            if parsed['format_nbc'] != VBAN_SERVICE_PONG:
+                return False
+
+            if parsed['name'] not in ['PING0', 'VBAN Service']:
+                return False
+
+            # PONG should have payload data (same size as PING)
+            return len(data) >= PINGPONG_PACKET_SIZE
+
+        except (ValueError, Exception):
+            return False
+
+
 @dataclass
 class VbanRequestHeader:
     """Represents the header of a request packet"""
@@ -238,7 +328,7 @@ class VbanRequestHeader:
 
     @property
     def streamname(self) -> bytes:
-        return self.name.encode() + bytes(16 - len(self.name))
+        return self.name.encode()[:16].ljust(16, b'\x00')
 
     @classmethod
     def to_bytes(

vban_cmd/packet/ping0.py

@@ -0,0 +1,124 @@
+from dataclasses import dataclass
+from enum import Enum
+
+from .headers import VbanPingHeader
+
+# VBAN PING bitType constants
+VBANPING_TYPE_RECEPTOR = 0x00000001  # Simple receptor
+VBANPING_TYPE_TRANSMITTER = 0x00000002  # Simple Transmitter
+VBANPING_TYPE_RECEPTORSPOT = 0x00000004  # SPOT receptor
+VBANPING_TYPE_TRANSMITTERSPOT = 0x00000008  # SPOT transmitter
+VBANPING_TYPE_VIRTUALDEVICE = 0x00000010  # Virtual Device
+VBANPING_TYPE_VIRTUALMIXER = 0x00000020  # Virtual Mixer
+VBANPING_TYPE_MATRIX = 0x00000040  # MATRIX
+VBANPING_TYPE_DAW = 0x00000080  # Workstation
+VBANPING_TYPE_SERVER = 0x01000000  # VBAN SERVER
+
+# VBAN PING bitfeature constants
+VBANPING_FEATURE_AUDIO = 0x00000001
+VBANPING_FEATURE_AOIP = 0x00000002
+VBANPING_FEATURE_VOIP = 0x00000004
+VBANPING_FEATURE_SERIAL = 0x00000100
+VBANPING_FEATURE_MIDI = 0x00000300
+VBANPING_FEATURE_FRAME = 0x00001000
+VBANPING_FEATURE_TXT = 0x00010000
+
+
+class VbanServerType(Enum):
+    """VBAN server types detected from PONG responses"""
+
+    UNKNOWN = 0
+    VOICEMEETER = VBANPING_TYPE_VIRTUALMIXER
+    MATRIX = VBANPING_TYPE_MATRIX
+
+
+@dataclass
+class VbanPing0Payload:
+    """Represents the VBAN PING0 payload structure as defined in the VBAN protocol documentation."""
+
+    def __init__(self):
+        self.bit_type = VBANPING_TYPE_RECEPTOR
+        self.bit_feature = VBANPING_FEATURE_TXT
+        self.bit_feature_ex = 0x00000000
+        self.preferred_rate = 48000
+        self.min_rate = 8000
+        self.max_rate = 192000
+        self.color_rgb = 0x00FF0000
+        self.version = b'\x01\x02\x03\x04'
+        self.gps_position = b'\x00' * 8
+        self.user_position = b'\x00' * 8
+        self.lang_code = b'EN\x00\x00\x00\x00\x00\x00'
+        self.reserved = b'\x00' * 8
+        self.reserved_ex = b'\x00' * 64
+        self.distant_ip = b'\x00' * 32
+        self.distant_port = 0
+        self.distant_reserved = 0
+        self.device_name = b'VBAN-CMD-Python\x00'.ljust(64, b'\x00')
+        self.manufacturer_name = b'Python-VBAN\x00'.ljust(64, b'\x00')
+        self.application_name = b'vban-cmd\x00'.ljust(64, b'\x00')
+        self.host_name = b'localhost\x00'.ljust(64, b'\x00')
+        self.user_name = b'Python User\x00'.ljust(128, b'\x00')
+        self.user_comment = b'VBAN CMD Python Client\x00'.ljust(128, b'\x00')
+
+    @classmethod
+    def to_bytes(cls) -> bytes:
+        """Convert payload to bytes"""
+        payload = cls()
+
+        data = bytearray()
+        data.extend(payload.bit_type.to_bytes(4, 'little'))
+        data.extend(payload.bit_feature.to_bytes(4, 'little'))
+        data.extend(payload.bit_feature_ex.to_bytes(4, 'little'))
+        data.extend(payload.preferred_rate.to_bytes(4, 'little'))
+        data.extend(payload.min_rate.to_bytes(4, 'little'))
+        data.extend(payload.max_rate.to_bytes(4, 'little'))
+        data.extend(payload.color_rgb.to_bytes(4, 'little'))
+        data.extend(payload.version)
+        data.extend(payload.gps_position)
+        data.extend(payload.user_position)
+        data.extend(payload.lang_code)
+        data.extend(payload.reserved)
+        data.extend(payload.reserved_ex)
+        data.extend(payload.distant_ip)
+        data.extend(payload.distant_port.to_bytes(2, 'little'))
+        data.extend(payload.distant_reserved.to_bytes(2, 'little'))
+        data.extend(payload.device_name)
+        data.extend(payload.manufacturer_name)
+        data.extend(payload.application_name)
+        data.extend(payload.host_name)
+        data.extend(payload.user_name)
+        data.extend(payload.user_comment)
+        return bytes(data)
+
+    @classmethod
+    def create_packet(cls, framecounter: int) -> bytes:
+        """Creates a complete PING packet with header and payload."""
+        data = bytearray()
+        data.extend(VbanPingHeader.to_bytes(framecounter))
+        data.extend(cls.to_bytes())
+        return bytes(data)
+
+    @staticmethod
+    def detect_server_type(pong_data: bytes) -> VbanServerType:
+        """Detect server type from PONG response packet.
+
+        Args:
+            pong_data: Raw bytes from PONG response packet
+
+        Returns:
+            VbanServerType enum indicating the detected server type
+        """
+        try:
+            if len(pong_data) >= 32:
+                frame_counter_bytes = pong_data[28:32]
+                frame_counter = int.from_bytes(frame_counter_bytes, 'little')
+
+                if frame_counter == VbanServerType.MATRIX.value:
+                    return VbanServerType.MATRIX
+                elif frame_counter == VbanServerType.VOICEMEETER.value:
+                    return VbanServerType.VOICEMEETER
+
+            return VbanServerType.UNKNOWN
+
+        except Exception:
+            return VbanServerType.UNKNOWN

vban_cmd/util.py

@@ -1,6 +1,23 @@
+import time
 from typing import Iterator
 
 
+def ratelimit(func):
+    """ratelimit decorator for {VbanCmd}.sendtext, to prevent flooding the network with script requests."""
+
+    def wrapper(*args, **kwargs):
+        self, *rem = args
+        if self.script_ratelimit > 0:
+            now = time.time()
+            elapsed = now - self._last_script_request_time
+            if elapsed < self.script_ratelimit:
+                time.sleep(self.script_ratelimit - elapsed)
+            self._last_script_request_time = time.time()
+        return func(*args, **kwargs)
+
+    return wrapper
+
+
 def cache_bool(func, param):
     """Check cache for a bool prop"""
 

vban_cmd/vbancmd.py

@@ -5,14 +5,19 @@ import threading
 import time
 from pathlib import Path
 from queue import Queue
-from typing import Union
+from typing import Mapping, Union
 
 from .enums import NBS
-from .error import VBANCMDError
+from .error import VBANCMDConnectionError, VBANCMDError
 from .event import Event
-from .packet.headers import VbanMatrixResponseHeader, VbanRequestHeader
+from .packet.headers import (
+    VbanMatrixResponseHeader,
+    VbanPongHeader,
+    VbanRequestHeader,
+)
+from .packet.ping0 import VbanPing0Payload, VbanServerType
 from .subject import Subject
-from .util import bump_framecounter, deep_merge
+from .util import bump_framecounter, deep_merge, ratelimit
 from .worker import Producer, Subscriber, Updater
 
 logger = logging.getLogger(__name__)
@@ -33,21 +38,23 @@ class VbanCmd(abc.ABC):
     def __init__(self, **kwargs):
         self.logger = logger.getChild(self.__class__.__name__)
         self.event = Event({k: kwargs.pop(k) for k in ('pdirty', 'ldirty')})
-        if not kwargs['ip']:
+        if not kwargs['host']:
             kwargs |= self._conn_from_toml()
         for attr, val in kwargs.items():
             setattr(self, attr, val)
 
         self._framecounter = 0
+        self._framecounter_lock = threading.Lock()
         self.sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
         self.sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
+        self.sock.settimeout(self.timeout)
         self.subject = self.observer = Subject()
         self.cache = {}
         self._pdirty = False
         self._ldirty = False
-        self._script = str()
         self.stop_event = None
         self.producer = None
+        self._last_script_request_time = 0
 
     @abc.abstractmethod
     def __str__(self):
@@ -86,7 +93,11 @@ class VbanCmd(abc.ABC):
         self.logout()
 
     def login(self) -> None:
-        """Starts the subscriber and updater threads (unless disable_rt_listeners is True) and logs into Voicemeeter."""
+        """Sends a PING packet to the VBAN server to verify connectivity and detect server type.
+        If the server is detected as Matrix, RT listeners will be disabled for compatibility.
+        """
+        self._ping()
+
         if not self.disable_rt_listeners:
             self.event.info()
 
@@ -102,7 +113,7 @@ class VbanCmd(abc.ABC):
             self.producer.start()
 
         self.logger.info(
-            "Successfully logged into VBANCMD {kind} with ip='{ip}', port={port}, streamname='{streamname}'".format(
+            "Successfully logged into VBANCMD {kind} with host='{host}', port={port}, streamname='{streamname}'".format(
                 **self.__dict__
             )
         )
@@ -120,6 +131,97 @@ class VbanCmd(abc.ABC):
     def stopped(self):
         return self.stop_event is None or self.stop_event.is_set()
 
+    def _get_next_framecounter(self) -> int:
+        """Thread-safe method to get and increment framecounter."""
+        with self._framecounter_lock:
+            current = self._framecounter
+            self._framecounter = bump_framecounter(self._framecounter)
+            return current
+
+    def _ping(self, timeout: float = None) -> None:
+        """Send a PING packet and wait for PONG response to verify connectivity."""
+        if timeout is None:
+            timeout = min(self.timeout, 3.0)
+
+        ping_packet = VbanPing0Payload.create_packet(self._get_next_framecounter())
+
+        original_timeout = self.sock.gettimeout()
+        self.sock.settimeout(0.5)
+
+        try:
+            self.sock.sendto(ping_packet, (socket.gethostbyname(self.host), self.port))
+            self.logger.debug(f'PING sent to {self.host}:{self.port}')
+
+            start_time = time.time()
+            response_count = 0
+            while time.time() - start_time < timeout:
+                try:
+                    data, addr = self.sock.recvfrom(2048)
+                    response_count += 1
+
+                    self.logger.debug(
+                        f'Received packet #{response_count} from {addr}: {len(data)} bytes'
+                    )
+                    self.logger.debug(
+                        f'Response header: {data[: min(32, len(data))].hex()}'
+                    )
+
+                    if VbanPongHeader.is_pong_response(data):
+                        self.logger.debug(
+                            f'PONG received from {addr}, connectivity confirmed'
+                        )
+
+                        server_type = VbanPing0Payload.detect_server_type(data)
+                        self._handle_server_type(server_type)
+
+                        return  # Exit after successful PONG response
+                    else:
+                        if len(data) >= 8:
+                            if data[:4] == b'VBAN':
+                                protocol = data[4] & 0xE0
+                                nbc = data[6]
+                                self.logger.debug(
+                                    f'Non-PONG VBAN packet: protocol=0x{protocol:02x}, nbc=0x{nbc:02x}'
+                                )
+                            else:
+                                self.logger.debug('Non-VBAN packet received')
+
+                except socket.timeout:
+                    continue
+
+            self.logger.debug(
+                f'PING timeout after {timeout}s, received {response_count} non-PONG packets'
+            )
+            raise VBANCMDConnectionError(
+                f'PING timeout: No response from {self.host}:{self.port} after {timeout}s'
+            )
+
+        except socket.gaierror as e:
+            raise VBANCMDConnectionError(
+                f'Unable to resolve hostname {self.host}'
+            ) from e
+        except Exception as e:
+            raise VBANCMDConnectionError(f'PING failed: {e}') from e
+        finally:
+            self.sock.settimeout(original_timeout)
+
+    def _handle_server_type(self, server_type: VbanServerType) -> None:
+        """Handle the detected server type by adjusting settings accordingly."""
+        match server_type:
+            case VbanServerType.VOICEMEETER:
+                self.logger.debug(
+                    'Detected Voicemeeter VBAN server - RT listeners supported'
+                )
+            case VbanServerType.MATRIX:
+                self.logger.info(
+                    'Detected Matrix VBAN server - disabling RT listeners for compatibility'
+                )
+                self.disable_rt_listeners = True
+            case _:
+                self.logger.debug(
+                    f'Unknown server type ({server_type}) - using default settings'
+                )
+
     def _send_request(self, payload: str) -> None:
         """Sends a request packet over the network and bumps the framecounter."""
         self.sock.sendto(
@@ -127,18 +229,18 @@ class VbanCmd(abc.ABC):
                 name=self.streamname,
                 bps_index=self.BPS_OPTS.index(self.bps),
                 channel=self.channel,
-                framecounter=self._framecounter,
+                framecounter=self._get_next_framecounter(),
                 payload=payload,
             ),
-            (socket.gethostbyname(self.ip), self.port),
+            (socket.gethostbyname(self.host), self.port),
         )
-        self._framecounter = bump_framecounter(self._framecounter)
 
     def _set_rt(self, cmd: str, val: Union[str, float]):
         """Sends a string request command over a network."""
         self._send_request(f'{cmd}={val};')
         self.cache[cmd] = val
 
+    @ratelimit
     def sendtext(self, script) -> str | None:
         """Sends a multiple parameter string over a network."""
         self._send_request(script)
@@ -146,14 +248,16 @@ class VbanCmd(abc.ABC):
 
         if self.disable_rt_listeners and script.endswith(('?', '?;')):
             try:
-                response = VbanMatrixResponseHeader.extract_payload(
+                data, _ = self.sock.recvfrom(2048)
-                    self.sock.recv(1024)
+                payload = VbanMatrixResponseHeader.extract_payload(data)
-                )
-                return response
             except ValueError as e:
                 self.logger.warning(f'Error extracting matrix response: {e}')
-
+            except TimeoutError as e:
-        time.sleep(self.DELAY)
+                self.logger.exception(f'Timeout waiting for matrix response: {e}')
+                raise VBANCMDConnectionError(
+                    f'Timeout waiting for response from {self.host}:{self.port}'
+                ) from e
+            return payload
 
     @property
     def type(self) -> str:
@@ -185,12 +289,8 @@ class VbanCmd(abc.ABC):
         while self.pdirty:
             time.sleep(self.DELAY)
 
-    def apply(self, data: dict):
+    def apply(self, data: Mapping):
-        """
+        """Set all parameters of a dict"""
-        Sets all parameters of a dict
-
-        minor delay between each recursion
-        """
 
         def target(key):
             match key.split('-'):
@@ -210,7 +310,9 @@ class VbanCmd(abc.ABC):
                     raise ValueError(ERR_MSG)
             return target[int(index)]
 
-        [target(key).apply(di).then_wait() for key, di in data.items()]
+        for key, di in data.items():
+            target(key).apply(di)
+            time.sleep(self.DELAY)
 
     def apply_config(self, name):
         """applies a config from memory"""

vban_cmd/worker.py

@@ -1,5 +1,4 @@
 import logging
-import socket
 import threading
 import time
 
@@ -13,7 +12,6 @@ from .packet.headers import (
 )
 from .packet.nbs0 import VbanPacketNBS0
 from .packet.nbs1 import VbanPacketNBS1
-from .util import bump_framecounter
 
 logger = logging.getLogger(__name__)
 
@@ -26,24 +24,18 @@ class Subscriber(threading.Thread):
         self._remote = remote
         self.stop_event = stop_event
         self.logger = logger.getChild(self.__class__.__name__)
-        self._framecounter = 0
 
     def run(self):
         while not self.stopped():
-            try:
+            for nbs in NBS:
-                for nbs in NBS:
+                sub_packet = VbanSubscribeHeader().to_bytes(
-                    sub_packet = VbanSubscribeHeader().to_bytes(nbs, self._framecounter)
+                    nbs, self._remote._get_next_framecounter()
-                    self._remote.sock.sendto(
+                )
-                        sub_packet, (self._remote.ip, self._remote.port)
+                self._remote.sock.sendto(
-                    )
+                    sub_packet, (self._remote.host, self._remote.port)
-                    self._framecounter = bump_framecounter(self._framecounter)
+                )
 
-                self.wait_until_stopped(10)
+            self.wait_until_stopped(10)
-            except socket.gaierror as e:
-                self.logger.exception(f'{type(e).__name__}: {e}')
-                raise VBANCMDConnectionError(
-                    f'unable to resolve hostname {self._remote.ip}'
-                ) from e
         self.logger.debug(f'terminating {self.name} thread')
 
     def stopped(self):
@@ -66,7 +58,6 @@ class Producer(threading.Thread):
         self.queue = queue
         self.stop_event = stop_event
         self.logger = logger.getChild(self.__class__.__name__)
-        self._remote.sock.settimeout(self._remote.timeout)
         self._remote._public_packets = [None] * (max(NBS) + 1)
         _pp = self._get_rt()
         self._remote._public_packets[_pp.nbs] = _pp
@@ -77,40 +68,33 @@ class Producer(threading.Thread):
 
     def _get_rt(self) -> VbanPacket:
         """Attempt to fetch data packet until a valid one found"""
-
         while True:
-            if resp := self._fetch_rt_packet():
+            try:
-                return resp
+                data, _ = self._remote.sock.recvfrom(2048)
+                if len(data) < HEADER_SIZE:
+                    continue
+            except TimeoutError as e:
+                self.logger.exception(f'{type(e).__name__}: {e}')
+                raise VBANCMDConnectionError(
+                    f'timeout waiting for response from {self._remote.host}:{self._remote.port}'
+                ) from e
 
-    def _fetch_rt_packet(self) -> VbanPacket | None:
+            try:
-        try:
+                header = VbanResponseHeader.from_bytes(data[:HEADER_SIZE])
-            data, _ = self._remote.sock.recvfrom(2048)
+            except ValueError as e:
-            if len(data) < HEADER_SIZE:
+                self.logger.debug(f'Error parsing response packet: {e}')
-                return
+                continue
-        except TimeoutError as e:
-            self.logger.exception(f'{type(e).__name__}: {e}')
-            raise VBANCMDConnectionError(
-                f'timeout waiting for response from {self._remote.ip}:{self._remote.port}'
-            ) from e
 
-        try:
+            match header.format_nbs:
-            header = VbanResponseHeader.from_bytes(data[:HEADER_SIZE])
+                case NBS.zero:
-        except ValueError as e:
+                    return VbanPacketNBS0.from_bytes(
-            self.logger.debug(f'Error parsing response packet: {e}')
+                        nbs=NBS.zero, kind=self._remote.kind, data=data
-            return None
+                    )
 
-        match header.format_nbs:
+                case NBS.one:
-            case NBS.zero:
+                    return VbanPacketNBS1.from_bytes(
-                return VbanPacketNBS0.from_bytes(
+                        nbs=NBS.one, kind=self._remote.kind, data=data
-                    nbs=NBS.zero, kind=self._remote.kind, data=data
+                    )
-                )
-
-            case NBS.one:
-                return VbanPacketNBS1.from_bytes(
-                    nbs=NBS.one, kind=self._remote.kind, data=data
-                )
-
-        return None
 
     def stopped(self):
         return self.stop_event.is_set()
@@ -138,7 +122,6 @@ class Producer(threading.Thread):
                 self.queue.put('pdirty')
             if self._remote.event.ldirty:
                 self.queue.put('ldirty')
-            # time.sleep(self._remote.ratelimit)
         self.logger.debug(f'terminating {self.name} thread')
         self.queue.put(None)