diff --git a/smnp/cli/__init__.py b/smnp/cli/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/smnp/cli/parser.py b/smnp/cli/parser.py
new file mode 100644
index 0000000..1ad3aeb
--- /dev/null
+++ b/smnp/cli/parser.py
@@ -0,0 +1,23 @@
+import argparse
+
+VERSION = "0.1"
+DESCRIPTION = """
+    Simple Music Notation Processor is a command line tool enabling you to do some music stuff using custom domain-specific language.
+"""
+
+class CliParser(object):
+    def __init__(self):
+        self.parser = argparse.ArgumentParser(description=DESCRIPTION)
+        self.parser.add_argument('file', nargs='*', help='a file containing SMNP code')
+        self.parser.add_argument('-c', '--code', action='append', default=[], type=str, help='a string with SMNP code')
+        self.parser.add_argument('-m', '--mic',  action='store_true', help='test microphone level')
+        self.parser.add_argument('-C', '--config', type=argparse.FileType('-r'), help='a file containing settings (not implemented yet)')
+        self.parser.add_argument('-p', '--params', action='append', help='pass arguments to program (not implemented yet)')
+        self.parser.add_argument('-v', '--version', action='version')
+        self.parser.add_argument('--tokens', action='store_true', help='print tokens of parsed code')
+        self.parser.add_argument('--ast', action='store_true', help='print abstract syntax tree of parsed code')
+        self.parser.add_argument('--dry-run', action='store_true', help='don\'t execute passed code')
+        self.parser.version = VERSION
+
+    def parse(self):
+        return self.parser.parse_args()
\ No newline at end of file
diff --git a/smnp/main.py b/smnp/main.py
index 94025a1..91c0481 100644
--- a/smnp/main.py
+++ b/smnp/main.py
@@ -1,17 +1,40 @@
 import sys
+import time
 
 from smnp.error.base import SmnpException
 from smnp.library.loader import loadStandardLibrary
 from smnp.program.interpreter import Interpreter
+from smnp.cli.parser import CliParser
+from smnp.module.mic.lib.detector.noise import NoiseDetector
+
+def interpretFile(args, file):
+    stdLibraryEnv = loadStandardLibrary() if not args.dry_run else None
+    Interpreter.interpretFile(file, printTokens=args.tokens, printAst=args.ast, execute=not args.dry_run, baseEnvironment=stdLibraryEnv)
+
+
+def interpretString(args, string):
+    stdLibraryEnv = loadStandardLibrary() if not args.dry_run else None
+    Interpreter.interpretString(string, printTokens=args.tokens, printAst=args.ast, execute=not args.dry_run, baseEnvironment=stdLibraryEnv, source='<cli>')
 
 
 def main():
     try:
-        stdLibraryEnv = loadStandardLibrary()
-        Interpreter.interpretFile(sys.argv[1], printTokens=False, printAst=False, execute=True, baseEnvironment=stdLibraryEnv)
+        parser = CliParser()
+        args = parser.parse()
+
+        if args.mic:
+            nd = NoiseDetector()
+            nd.test()
+
+        for code in args.code:
+            interpretString(args, code)
+
+        for file in args.file:
+            interpretFile(args, file)
 
     except SmnpException as e:
         print(e.message())
 
     except KeyboardInterrupt:
         print("Program interrupted")
+