Now the keyboards' design is very good, lightweight, sound coming from the speaker is decent. Can use 6 AA battery on this one. 100 tones, 100 rhythms and 99 songbank. Learning option which turns on and off Right or Left hand. Also learning chords options. No sustain option or sustain pedal connection. Not touch response. No reverb or hall button/switch. But there's transpose/tune option. Other relevant differences are that the CTK 1500 does not include a metronome, while the CTK 2500 does. Finally, the CTK 1500 does not have a sustain pedal input, whereas the CTK 2500 does.

Casio Computer Co., Ltd. is an electronics manufacturer founded in 1946 and based in Tokyo, Japan. Now we will look at their CTK 1500 keyboard which is an excellent choice for beginners, and people who are learning to play the keyboard. It is the predecessor of the Casio CTK 1550 that we will compare later.

It's a micro calculator. It has capacity to record, play demo music, vibrato switch, and tempo function. Demo -melody is same VL-1 and it hasn't rhythms.

tones with switch button, another 5 tones in CAL programming ADSR mode and one memory tone to save ADSR sound)One difference is that the Casio has 2W speakers, while the Yamaha has 2.5W speakers. Slightly more powerful. The Casio CTK-1150 is a keyboard that features a built-in speaker system with two speakers. It has a total of 61 keys, providing a wide range of octaves for playing various melodies. The keyboard offers a maximum polyphony of 12 notes, allowing for relatively simple and straightforward compositions. Sustain and vibrato (with options, including vibrato delay). 2 additional sound effects (one is a laser). Had barcode reader accessory to program the on-board sequencer. Both keyboards have 61 keys, however on the Startone we find that they have sensitivity, i.e. if we play with more or less force, the note volume will increase or decrease proportionally. Voices only (no rhythm section). Sustain and vibrato effects only. Four tones of choice can be stored for press-button access.