This article provides information on the sound capabilities of the iBook.

The iBook has compact disc quality stereo audio circuitry. The sound system supports a sample rate of 44.1 kHz and sample sizes up to 16 bits.

Internal Speaker

The iBook has one built-in mono speaker located between the keyboard and the display on the left-hand side. The computer turns off the sound signal to the speaker when headphones are connected to the headphone jack.

Sound Out port

The sound out port is a 16 bit stereo mini-jack located on the left side of the computer at the left palm rest. The headphone jack is configured to drive a pair of low-impedance stereo headphones. External powered speakers may also be connected to the headphone jack. Using this port or the USB port, one can connect two speakers for stereo sound.

Sound In

The iBook does not have a microphone or sound input jack. The USB port does support a USB microphone to allow for sound input into the iBook.

USB Sound Support

You can attach USB speakers to get stereo sound. Also you can attach a USB microphone for sound in.

Function Keys

The function keys on the keyboard can be used to increase, decrease and mute the sound.

• F3 will decrease the sound volume
• F4 will increase the sound volume
• F6 will mute the sound.

The internal modem will send the handshaking audio to the sound system so the user can hear the status of a dial-up modem connection. The level of handshaking audio is fixed. The handshaking audio is mixed into the sound output stream.

CD-ROM Drive

Digital audio signals from the CD-ROM drive are sent to the speaker and the headphone jack.