diff --git a/src/Tools/cpp_out/src/main.rs b/src/Tools/cpp_out/src/main.rs
index fb4d1ba9..9d4063ed 100644
--- a/src/Tools/cpp_out/src/main.rs
+++ b/src/Tools/cpp_out/src/main.rs
@@ -34,7 +34,7 @@ fn configurate(cmd: &mut CommandLine) -> Result<Configuration, Error> {
 
 fn run_main(mut cmd: CommandLine) -> Result<(), Error> {
     let cfg    = configurate(&mut cmd)?;
-    let input  = tool_helper::open_input(cmd.input_file)?;
+    let input  = tool_helper::open_input(&cmd.input_file)?;
     let output = tool_helper::open_output(&Some(cmd.output_file))?;
 
     return cpp_out::convert(cfg, input, output);
diff --git a/src/Tools/jaby_engine_fconv/src/audio/xa/mod.rs b/src/Tools/jaby_engine_fconv/src/audio/xa/mod.rs
index 1a39bfe9..81c7790d 100644
--- a/src/Tools/jaby_engine_fconv/src/audio/xa/mod.rs
+++ b/src/Tools/jaby_engine_fconv/src/audio/xa/mod.rs
@@ -1,10 +1,27 @@
-use clap::Args;
-use std::io::Write;
-use tool_helper::{Error, Input};
+use clap::{Args, ValueEnum};
+use std::path::PathBuf;
+use tool_helper::Error;
 
 #[derive(Args)]
-pub struct Arguments {}
+pub struct Arguments {
+    #[clap(value_enum, value_parser, default_value_t=Quality::High)]
+    quality: Quality,
+    #[clap(value_enum, value_parser, default_value_t=Sample::Stereo)]
+    sample: Sample
+}
 
-pub fn convert(_args: Arguments, _input: Input, _output: &mut dyn Write) -> Result<(), Error> {
+#[derive(Copy, Clone, ValueEnum)]
+pub enum Quality {
+    Low,
+    High
+}
+
+#[derive(Copy, Clone, ValueEnum)]
+pub enum Sample {
+    Mono,
+    Stereo
+}
+
+pub fn convert(_args: Arguments, _input: PathBuf, _output: PathBuf) -> Result<(), Error> {
     Err(Error::not_implemented("XA Audio convert"))
 }
\ No newline at end of file
diff --git a/src/Tools/jaby_engine_fconv/src/main.rs b/src/Tools/jaby_engine_fconv/src/main.rs
index ca6e48a8..0592a3f2 100644
--- a/src/Tools/jaby_engine_fconv/src/main.rs
+++ b/src/Tools/jaby_engine_fconv/src/main.rs
@@ -26,8 +26,8 @@ enum SubCommands {
     XA(xa::Arguments)
 }
 
-fn run_main(cmd: CommandLine) -> Result<(), Error> {
-    let mut input       = tool_helper::open_input(cmd.input_file)?;
+fn run_internal_conversion(cmd: CommandLine) -> Result<(), Error> {
+    let mut input       = tool_helper::open_input(&cmd.input_file)?;
     let mut buffer      = Vec::<u8>::new();
     let mut output_file = tool_helper::open_output(&cmd.output_file)?;
     let     dst_buffer  = {
@@ -44,7 +44,7 @@ fn run_main(cmd: CommandLine) -> Result<(), Error> {
         match cmd.sub_command {
             SubCommands::Nothing         => nothing::copy(&mut input, dst_buffer),
             SubCommands::SimpleTIM(args) => reduced_tim::convert(args, input, dst_buffer),
-            SubCommands::XA(args)        => xa::convert(args, input, dst_buffer),
+            _                            => Err(Error::not_implemented("External functions can not be called internal"))
         }
     };
     
@@ -66,7 +66,27 @@ fn run_main(cmd: CommandLine) -> Result<(), Error> {
         output_file.write(&buffer)?;
     }
 
-    Ok(())
+    Ok(())    
+}
+
+fn run_external_conversion(cmd: CommandLine) -> Result<(), Error> {
+    let input_file  = cmd.input_file.ok_or(Error::from_str("Input has to be a file"))?;
+    let output_file = cmd.output_file.ok_or(Error::from_str("Output has to be a file"))?;
+
+    match cmd.sub_command {
+        SubCommands::XA(args)        => xa::convert(args, input_file, output_file),
+        _                            => Err(Error::not_implemented("Internal functions can not be called external"))
+    }
+}
+
+fn run_main(cmd: CommandLine) -> Result<(), Error> {
+    if matches!(cmd.sub_command, SubCommands::XA(_)) {
+        run_external_conversion(cmd)
+    }
+
+    else {
+        run_internal_conversion(cmd)
+    }
 }
 
 fn main() {
diff --git a/src/Tools/mkoverlay/src/main.rs b/src/Tools/mkoverlay/src/main.rs
index f6e769c5..51261492 100644
--- a/src/Tools/mkoverlay/src/main.rs
+++ b/src/Tools/mkoverlay/src/main.rs
@@ -18,7 +18,7 @@ struct CommandLine {
 
 fn parse_input(input: Option<PathBuf>) -> Result<OverlayDesc, Error> {
     if let Some(input) = input {
-        let input = format_if_error!(open_input(Some(input)), "Opening input file failed with: {error_text}")?;
+        let input = format_if_error!(open_input(&Some(input)), "Opening input file failed with: {error_text}")?;
         format_if_error!(mkoverlay::types::json_reader::read_config(input), "Parsing JSON file failed with: {error_text}")    
     }
     
diff --git a/src/Tools/tool_helper/src/lib.rs b/src/Tools/tool_helper/src/lib.rs
index 6d2cb102..feb27da0 100644
--- a/src/Tools/tool_helper/src/lib.rs
+++ b/src/Tools/tool_helper/src/lib.rs
@@ -183,7 +183,7 @@ pub fn open_output(output_file: &Option<PathBuf>) -> Result<Output, Error> {
     }
 }
 
-pub fn open_input(input_file: Option<PathBuf>) -> Result<Input, Error> {
+pub fn open_input(input_file: &Option<PathBuf>) -> Result<Input, Error> {
     match input_file {
         Some(input_path) => Ok(Box::new(open_input_file_buffered(&input_path)?)),
         None             => Ok(Box::new(BufReader::new(std::io::stdin()))),