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Casio CTK-4000 Personal Keyboard, 61-Key, with MP3 Connection, 10 Second Sampling, and Digital Effects

by Casio
3.5 out of 5 stars 10 customer reviews

Available from these sellers.
  • 61 piano-style keys
  • Touch Response (2 sensitivity levels, off)
  • 48-note polyphony (maximum)
  • 570 high-quality tones including stereo grand piano tones
  • 180 rhythms including 74 ethnic rhythms and 20 patterns for piano play
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Product Description

Product Description

The Casio CTK4000 is a Touch Sensitive General MIDI Keyboard that allows you to freely express all of your performances. And it's loaded with features like a USB port to connect to your computer, plus 48-note polyphony so you are always in control. Want to sound like you are playing in a large concert hall? Consider it done with the on-board Digital Effects which will add another dimension to your playing. In addition, the CTK4000 keyboard features a 61-key full-size keyboard with MP3 connectivity, an LCD display, pitch-bend wheel, and a 3 Step Lesson learning system. The CTK4000 allows you to select up to 570 tones that now include a world music library. There are also 180 versatile rhythms to help add plenty of life to all your keyboard performances. The CTK4000 comes with a total of 152 built-in tunes. You can play back built-in tunes for your own listening pleasure, or you can use them for practice or even sing-alongs. You will also be able to record up to 5 songs of your very own with the six track built-in recorder. The CTK4000 also features a new 10 second sampling feature, which will allow you to sample almost anything that you can think of!


The Casio CTK-4000 is an affordable instrument with a 61 Key Piano Style Touch Sensitive Keyboard, 570 total onboard Tones, 180 Rhythms and Reverb plus Chorus Digital Effects. Packed with great features such as Casio's famous Step-up Lesson System, audio inputs for a MP3 player and a USB port for MIDI. All this makes CTK-4000 more realistic and expressive than ever before at this price range.

A truly feature-packed portable. Click to enlarge.

Standard-Size Keys with Touch Response
The CTK-4000 features 61 standard-size keys and two sensitivity levels for a more piano-like experience, along with 48-note polyphony (24-note for certain tones).

570 Built-In Tones
Find just the right sound with 570 built-in tones, from strings to woodwinds and plenty more. You can layer two different tones (such as piano and strings) or split the keyboard down the middle for an ensemble approach.

Reverb and Chorus Effects
Select from ten different reverb and five different chorus effects to add depth and shimmer to your performance.

USB Port
For many musicians, the computer has become a music-making center. Connect the CTK-4000 to a computer using a USB cable and exchange MIDI data between the two devices. Send play data from the keyboard to music software running on your computer, or send MIDI data from your computer to the keyboard for playback.

Built-In Sampling
You can use the CTK-4000 to sample a sound from a portable audio player or other device, and then play the sound with keyboard keys. Sample up to ten seconds, and store up to five sampled sounds to keyboard memory.

You can also loop sampled sounds so they continue to play, or replace individual sounds on drum patches.

Internal speakers and battery-powering option for full portability. Click to enlarge.

Intuitive editing and controls.

152 Built-In Songs and Ten User Songs
The CTK-4000 comes with a bank of songs for your learning and enjoyment, from classics like "Greensleeves" or "Auld Lang Syne" to holiday tunes like "Jingle Bells."

You can also record your own performances, using up to six tracks of different instruments.

Step Up Lessons
To master a song, it is best to break it up into shorter parts (phrases), master the phrases, and then put everything together. The CTK-4000 features a "Step Up Lesson" feature that helps you to do just that. The built-in songs are pre-divided into phrases to help you master keyboard play. Step Up Lesson takes you through practice of the right hand part, left hand part, and both hand parts for each phrase of a song. Master all of the phrases and you master the song.

Music Challenge Keyboard Game
Music Challenge is a game that measures your reaction speed as you press keys in response to on-screen keyboard indicators and fingering guide indications.

Auto Accompaniment
With Auto Accompaniment, simply select an accompaniment pattern. Each time you play a chord with your left hand the appropriate accompaniment will play automatically. It's like having a personal backup group along with you wherever you go.

You can also edit and save up to 10 of your own auto accompaniment patterns.

Auto Harmonize
Auto Harmonize automatically adds harmony to notes you play with your right hand, which adds rich depth to the melody of your performances. You can select from among 12 types of Auto Harmonize to suit the type of music you are playing.

The Arpeggiator makes it possible to play an arpeggio pattern automatically. There are 90 different arpeggio patterns from which to choose in order to match the music you are playing.

Transpose Function
An easy operation instantly changes the key of the keyboard.

Audio Input
Play along with MP3 or CD players or other devices by plugging them into the stereo mini input jack.

Battery or AC Power
Power the CTK-4000 with six D-sized batteries or purchase the AD-5 AC adapter separately to power from your electrical outlets. Built-in speakers make the keyboard entirely portable.

An Auto Power Off feature turns off the device six minutes after the last key is touched, helping you save batteries.

What's in the Box
CTK-4000 Keyboard, Music Stand, Song Book, Safety Precautions, Appendix, Warranty

Product Details

  • Product Dimensions: 43.2 x 8.2 x 18.8 inches
  • Shipping Weight: 15.8 pounds
  • Domestic Shipping: Item can be shipped within U.S.
  • International Shipping: This item is not eligible for international shipping. Learn More
  • Shipping Advisory: This item must be shipped separately from other items in your order. Additional shipping charges will not apply.
  • ASIN: B001FSJC1E
  • Item model number: CAS CTK4000
  • Average Customer Review: 3.5 out of 5 stars  See all reviews (10 customer reviews)
  • Amazon Best Sellers Rank: #109,410 in Musical Instruments (See Top 100 in Musical Instruments)
  • Product Warranty: For warranty information about this product, please click here
  • Date first available at Amazon.com: June 10, 2004

Customer Reviews

Top Customer Reviews

I selected this unit as a birthday gift to myself in August.
On the morning of my birthday in September, I was very excited to open it up, and begin playing it.
Prior to this unit, I had been using a 2000 model, the CTK-551.
I purchased the CTK-551 at a Flea Market in 2007.
Though it was in full working order as far as keys and controls, it unfortunately could not play from electricity due to a bad diode.
This is what led me to search for a new unit.
It was a tie between the CTK-2100 for $99.99, and this unit, the CTK-4000, for $149.99.
After testing both units, I decided upon the 4000, based on sound and tone quality.
The unit features 570 instrument sounds, utilizing the AHL sound engine, which is said to produce higher quality and more realistic instrument tones.
Most of the tones do in fact sound much morr realistic than that of CTK-551, especially the Pianos, Harpsichords, and Reed/Brass tones.
Some of the tones are still a bit on the artificial side, especially the organs and guitars.
The unit also features 180 background rhythms, including 8 and 16 beat, rock, pop, dance, ballad, and worldwide, e.g. european, Chinese, asian Indian .
These accompaniment patterns are very nice, and help me out quite a bit in making pleasant sounding songs.
I play by ear, and almost always create my own instrumental pieces.
Occasionally, I do play without the Auto Accompaniment, especially using the Stereo Piano, Organ and Reed/Brass tones.
The accompaniment section does include one of my favorite patterns in the european section which was not included on the CTK-551, titled Serenade.
I love the chord sequence of the pattern.
Read more ›
Comment 11 of 12 people found this helpful. Was this review helpful to you? Yes No Sending feedback...
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If you want to bang keys for a few days and then put this into the corner of your darkest closet this keyboard is probably fine. But, if you were planning on using this as a tool to learn to play a keyboard I would advise against it. After less than 4 months (Less than 40 hours total use) the keys are all starting to squeak and bend oddly.

If you're like me (and want something that is at least reliable and feels right even though you aren't a pro) I'd advise spending a bit more to get something that isn't so flimsy, as this is just annoying and I'll have to go replace it now. I have no idea what better products exist (I'm not a pro, as I stated), but I will seek one out.
2 Comments 13 of 15 people found this helpful. Was this review helpful to you? Yes No Sending feedback...
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By dave on January 9, 2011
Verified Purchase
It was a gift for my young daughters 7&9. They love it. Plus it hooks up to my Mac so they can learn to play. Very prompt delivery and excellent service through amazon. Only complaint i have is that the power adapter was not included
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By Now on August 6, 2013
Verified Purchase
I've had mine for about two years now and it plays great. If you really want one I would suggest EBay or Craigslist first - unless you want this model.
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I could not afford any of the Phantom keyboards for my 27 year old musician husband. He produces beats and I wanted to surprise him for Christmas since his previous keyboard broke plus I had a budget. I did not want some play school keyboard. So I did research and comparisons. And although it is not the heavy duty super star artist equipment, it gets the job done. And he was really happy on Christmas!
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