HP508: How to transpose the keyboard to one key, and a audio file to a different key

You can transpose multiple different elements on the HP508 piano. You can transpose the keyboard itself, you can transpose a song (audio format only), or you can transpose both together.

Here is the procedure for transposing an audio file to a different key:*

1. While holding down the [song balance] button, press the [AB repeat] button to enter "function mode".
2. Use the Slow/Fast buttons to select the parameter called "Audio Transpose".
3. Use the [-] and [+] buttons to select your desired setting. You can transpose the song up to 5 half steps up (+5), or up to 6 half steps down (-6).
4. Press the [Song balance] button and the [AB Repeat] button to exit function mode.
   *This procedure only works with audio files,  and NOT with MIDI files.  Also be aware that you must have a USB device plugged into the piano in order to record audio files.

Here is the procedure for transposing the keyboard by itself, without affecting the chosen song (audio file):

1. While holding down the [song balance] button, press the [AB repeat] button to enter "function mode".
2. Use the Slow/Fast buttons to select the parameter called "Transpose Mode".
3. Use the [-] and [+] buttons to select the setting "keyboard", so that the transpose mode will only affect the sound of the keyboard.
4. Press the [Song balance] button and the [AB Repeat] button to exit function mode.

The above procedures will allow you to transpose the audio file to one key, and have the keyboard set to another key.  This is a nice option if you want to change the key of the song, without having to play on a transposed keyboard.