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The Casio CTK-6600 Portable Keyboard's Song Sequencer provides 16 tracks plus one system track that supports recording of up to five songs and a total of approximately 12,000 notes.  A 32-channel Mixer with button operation can be used for individual simultaneous adjustment of volume, pan, reverb send, and other parameters. The Rhythm Editor lets you combine instrument parts from multiple built-in rhythms, turn individual instrument parts on or off, and adjust volume, pan, reverb, and other parameters to create your own original rhythms. You can even store up to 10 original rhythms in memory for instant recall whenever you need them.Built-in digital effects include reverb (10 types), chorus (5 types), and DSP (100 types using 46 effect types including delay, phaser, flanger, wah, rotary, and more).Plus, you can create original DSP effects and store up to 100 original types in memory for later recall. The equalizer incorporates five selectable frequency characteristics,including ??ç?úBright??ç?Ñ for a lively sound emphasizing the treble range and ??ç?úPowerful??ç?Ñ with a stress on volume.  A simple operation saves the current setup, including tone, rhythm, and other settings for instant recall when you need them. 4 sets x 8 banks for 32 setups. Recalling a registration instantly changes the digital keyboard's setup, making this a great tool for live stage performances. Tone Editor can be used to adjust attack time, release time, cut off, vibrato, reverb, chorus, DSP, and other parameters as desired. You can create distinctively original tones for performances and music creation sessions. Song sequencer, tone editor, and other data can be saved to an SD or SDHC memory card. SMF (Standard MIDI File) data stored on an SD or SDHC memory card can be played back on the digital keyboard.Line out terminals (L/MONO, R) for connection of the mixer of a stage PA system or other devices, a MIC IN terminal for connection of a musical instrument or microphone, an audio in terminal (AUDIO IN) for audio device input that can be output through the speakers, and more.  The USB port provides easy computer and MIDI send/receive connection. It also enables quick and simple transfer of song sequencer, pattern sequencer, tone editor and other data, as well as audio data recorded to an SD memory card from an audio device between the digital keyboard and a computer. Casio WK-6600 Features:76 piano-style keys210 rhythmsTone and rhythm editor: 700 tones, 10 user tones100 DSP effects: 100 preset, 100 user LC display, data entry dialArpeggiator: 150 types Pitch bend wheel : 0 to 24 semitones 32 channel mixer17 track sequencer32 settings in the registration memorySD card slot (2??ç??32 GB)Audio/Mic In terminalCan be battery operated2 x 6 W bass reflex speakersNew design