Are all the notes of a chord played at the same time?

Yes.

Usually the music will be written and played that way. Sometimes a dominant note will persist beyond the chord. A pianist may choose to introduce a slight glissando (sliding up or down) into a chord.

No, not all the notes of a chord are played at the same time. The notes of a chord can be played in various ways depending on the style and instrumentation of the music. Here are some common ways chords are played:

1. Simultaneously: In traditional harmonic music, chords are often played by striking or holding down all the notes of the chord at the same time. This creates a rich and full sound.

2. Arpeggiated: Chords can also be broken up and played as individual notes in a sequence. This is called arpeggiation. For example, instead of playing all the notes of a C major chord (C, E, G) simultaneously, you would play them one after another.

3. Strummed: On instruments like the guitar or ukulele, chords are often strummed. This means that all the notes of the chord are played in rapid succession, usually using a pick or by using fingers to pluck the strings.

4. Voicing: In more complex arrangements, different instruments or voices might play different notes of a chord. For example, a piano might play the root note, while a guitar plays the higher notes of the chord.

It's important to note that how a chord is played can greatly influence the overall sound and feel of the music. Experimenting with different techniques can bring out different emotions and textures in your playing.