diff --git a/examples/hotkeys/setup.py b/examples/hotkeys/setup.py
new file mode 100644
index 0000000..06a1afe
--- /dev/null
+++ b/examples/hotkeys/setup.py
@@ -0,0 +1,7 @@
+from setuptools import setup
+
+setup(
+    name="hotkeys",
+    description="hotkeys example",
+    install_requires=["obsws-python", "keyboard"],
+)
diff --git a/examples/levels/README.md b/examples/levels/README.md
new file mode 100644
index 0000000..5780767
--- /dev/null
+++ b/examples/levels/README.md
@@ -0,0 +1,16 @@
+## About
+
+Prints POSTFADER level values for audio device `Desktop Audio`. If mute toggled prints mute state changed notification.
+
+## Use
+
+This example assumes the existence of a `config.toml`, placed next to `__main__.py`:
+
+```toml
+[connection]
+host = "localhost"
+port = 4455
+password = "mystrongpass"
+```
+
+Press `<Enter>` to exit from the script.
diff --git a/examples/levels/__main__.py b/examples/levels/__main__.py
new file mode 100644
index 0000000..62e03a8
--- /dev/null
+++ b/examples/levels/__main__.py
@@ -0,0 +1,46 @@
+from enum import IntEnum
+from math import log
+
+import obsws_python as obs
+
+LEVELTYPE = IntEnum(
+    "LEVELTYPE",
+    "VU POSTFADER PREFADER",
+    start=0,
+)
+
+
+def on_input_mute_state_changed(data):
+    """An input's mute state has changed."""
+    if data.input_name == DEVICE:
+        print(f"{DEVICE} mute toggled")
+
+
+def on_input_volume_meters(data):
+    """volume level update every 50 milliseconds"""
+
+    def fget(x):
+        return round(20 * log(x, 10), 1) if x > 0 else -200.0
+
+    for device in data.inputs:
+        name = device["inputName"]
+        if name == DEVICE and device["inputLevelsMul"]:
+            left, right = device["inputLevelsMul"]
+            print(
+                f"{name} [L: {fget(left[LEVELTYPE.POSTFADER])}, R: {fget(right[LEVELTYPE.POSTFADER])}]",
+            )
+
+
+def main():
+    client = obs.EventClient(subs=(obs.Subs.LOW_VOLUME | obs.Subs.INPUTVOLUMEMETERS))
+    client.callback.register([on_input_volume_meters, on_input_mute_state_changed])
+
+    while cmd := input("<Enter> to exit>\n"):
+        if not cmd:
+            break
+
+
+if __name__ == "__main__":
+    DEVICE = "Desktop Audio"
+
+    main()
diff --git a/obsws_python/__init__.py b/obsws_python/__init__.py
index 6ab08c5..d54af06 100644
--- a/obsws_python/__init__.py
+++ b/obsws_python/__init__.py
@@ -1,4 +1,5 @@
+from .enum import Subs
 from .events import EventClient
 from .reqs import ReqClient
 
-__ALL__ = ["ReqClient", "EventClient"]
+__ALL__ = ["ReqClient", "EventClient", "Subs"]
diff --git a/obsws_python/enum.py b/obsws_python/enum.py
new file mode 100644
index 0000000..b3c4b7e
--- /dev/null
+++ b/obsws_python/enum.py
@@ -0,0 +1,43 @@
+from enum import IntFlag
+
+
+class Subs(IntFlag):
+    GENERAL = 1 << 0
+    CONFIG = 1 << 1
+    SCENES = 1 << 2
+    INPUTS = 1 << 3
+    TRANSITIONS = 1 << 4
+    FILTERS = 1 << 5
+    OUTPUTS = 1 << 6
+    SCENEITEMS = 1 << 7
+    MEDIAINPUTS = 1 << 8
+    VENDORS = 1 << 9
+    UI = 1 << 10
+
+    LOW_VOLUME = (
+        GENERAL
+        | CONFIG
+        | SCENES
+        | INPUTS
+        | TRANSITIONS
+        | FILTERS
+        | OUTPUTS
+        | SCENEITEMS
+        | MEDIAINPUTS
+        | VENDORS
+        | UI
+    )
+
+    INPUTVOLUMEMETERS = 1 << 16
+    INPUTACTIVESTATECHANGED = 1 << 17
+    INPUTSHOWSTATECHANGED = 1 << 18
+    SCENEITEMTRANSFORMCHANGED = 1 << 19
+
+    HIGH_VOLUME = (
+        INPUTVOLUMEMETERS
+        | INPUTACTIVESTATECHANGED
+        | INPUTSHOWSTATECHANGED
+        | SCENEITEMTRANSFORMCHANGED
+    )
+
+    ALL = LOW_VOLUME | HIGH_VOLUME
diff --git a/obsws_python/events.py b/obsws_python/events.py
index a2f07bc..0771e26 100644
--- a/obsws_python/events.py
+++ b/obsws_python/events.py
@@ -1,11 +1,11 @@
 import json
 import logging
 import time
-from enum import IntEnum
 from threading import Thread
 
 from .baseclient import ObsClient
 from .callback import Callback
+from .enum import Subs
 
 """
 A class to interact with obs-websocket events
@@ -13,33 +13,13 @@ defined in official github repo
 https://github.com/obsproject/obs-websocket/blob/master/docs/generated/protocol.md#events
 """
 
-Subs = IntEnum(
-    "Subs",
-    "general config scenes inputs transitions filters outputs sceneitems mediainputs vendors ui",
-    start=0,
-)
-
 
 class EventClient:
     logger = logging.getLogger("events.eventclient")
     DELAY = 0.001
 
     def __init__(self, **kwargs):
-        defaultkwargs = {
-            "subs": (
-                (1 << Subs.general)
-                | (1 << Subs.config)
-                | (1 << Subs.scenes)
-                | (1 << Subs.inputs)
-                | (1 << Subs.transitions)
-                | (1 << Subs.filters)
-                | (1 << Subs.outputs)
-                | (1 << Subs.sceneitems)
-                | (1 << Subs.mediainputs)
-                | (1 << Subs.vendors)
-                | (1 << Subs.ui)
-            )
-        }
+        defaultkwargs = {"subs": Subs.LOW_VOLUME}
         kwargs = defaultkwargs | kwargs
         self.base_client = ObsClient(**kwargs)
         if self.base_client.authenticate():
diff --git a/setup.py b/setup.py
index f25013f..48cd041 100644
--- a/setup.py
+++ b/setup.py
@@ -5,7 +5,7 @@ from setuptools import find_packages, setup
 HERE = pathlib.Path(__file__).parent
 
 
-VERSION = "1.1.1"
+VERSION = "1.2.0"
 PACKAGE_NAME = "obsws-python"
 AUTHOR = "Adem Atikturk"
 AUTHOR_EMAIL = "aatikturk@gmail.com"