update README

Author: tworkool

README.md

@@ -1,11 +1,45 @@
-# python-flac-to-wav-audioconverter
+# Rekordbox Audio Converter
+This is a python audio converter that uses ffmpeg to convert audio files from one format to Rekordbox audio formats (as listed here: https://cdn.rekordbox.com/files/20210302175909/rekordbox6.4.2_introduction_de.pdf [p.23]). Currently the converter is only configured to convert to:
+* WAV
+* AIFF
+
+But those are the main formats I see as important anyway.
+Other formats can be added in the `audio_converter.py` AudioConverter class
+This is how the config looks like:
+```
+self.allowed_formats = ['aiff', 'wav']
+self.allowed_quality = ['normal', 'high']
+self.ffmpeg_type_arguments = {
+    "aiff_normal": {
+        "codec": 'pcm_s16be',
+        "sampling_rate": '44100',
+        "bit_rate": None,
+        "custom": [],
+    },
+    "aiff_high": {
+        "codec": 'pcm_s24be',
+        "sampling_rate": '96000',
+        "bit_rate": None,
+        "custom": [],
+    },
+    ...
+}
+```
+
+* `allowed_formats` are the out formats
+* `allowed_quality` is the output quality
+* `ffmpeg_type_arguments` are the ffmpeg arguments for audio codec, sampling rate, bit rate and other custom ffmpeg arguments. The key of an configuration should be: `"<OUT_FILE_TYPE>_<OUT_QUALITY>"`. So in this example the file type aiff with settings for normal and high quality is configured
 
 ## Prerequisites
-The Python scripts are made to run on windows devices only!
+The Python scripts are made to run on windows devices only, but may work on other OS too (did not test).
 
-If you have not installed **ffmpeg** then do so, because it is required. Also don't forget to add it to you PATH environment variables.
+If you have not installed **ffmpeg** then do so, because it is required. Also don't forget to add it to your PATH environment variables.
 
 ## Setup
+### First Steps
 1. run `install_requirements.bat` to install required python packages
-2. run `make_spec.bat` to create a spec file with pyinstaller (if you want the config file to be copied automatically, please read the instructions in the make_spec batch script!, otherwise you can copy the `config.ini` file manually into the folder where the executable will be build)
-3. run `build.bat` to build the executable from the spec file
+2. run `make_spec.bat` to create a spec file with pyinstaller
+3. run `build.bat` to build the executable from the spec file
+
+### Build
+execute step 3 of previous chapter