Casio CTK6000 User's Guide

To reset the Casio CTK6000 to factory settings, turn off the keyboard, press and hold the 'Tone' and 'Function' buttons simultaneously, then turn the keyboard back on while still holding the buttons.
Check if the volume is turned up, ensure headphones are not plugged in, and verify that the power adapter is properly connected. Also, try performing a factory reset.
Use a USB MIDI interface cable to connect the keyboard to your computer. Install any necessary drivers and select the CTK6000 as the MIDI device in your software settings.
Press the 'Song Sequencer' button, select a track, press 'Record', and then start playing. Press 'Stop' when you are finished.
Press the 'Function' button, navigate to 'Touch Response', and select your desired sensitivity level from the options available.
Check for debris or dirt under the keys. If the issue persists, it may require professional cleaning or repair.
Yes, you can layer sounds by selecting a main tone and then pressing the 'Layer' button to choose a second tone to layer.
Use the 'Tempo' buttons to increase or decrease the tempo while a rhythm is playing.
Yes, connect a compatible sustain pedal to the designated pedal input on the keyboard to use it.
Use the 'Registration Memory' feature to save your custom settings by pressing the 'Store' button followed by a memory slot number.