Apple Logic Pro 7 User Manual download pdf (Page 380)

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380 Chapter 10 Audio Drivers

Larger Disc Buffer

This option influences the amount of audio data that is read from the disk in advance.

This option is switched off by default, matching the demands of fast hard drives and

powerful computers. If you encounter frequent error messages while running Logic in

this mode, you should switch this setting on. This will allow you to play back more tracks,

achieving higher reliability. Please note that RAM requirements are increased if this

option is active.

24 Bit Recording

When this setting is active, Logic can record 24 bit files. Please note that this only

makes sense if you are actually using a 20 or 24 bit interface. As long as your audio

hardware is capable of this bit resolution, you can select this option in the Audio >

Audio Hardware & Drivers window. 20 or 24 bit recordings offer a significant

improvement in the available dynamic range, but require high quality peripheral

components such as microphones, preamps, and high quality AD/DA converters. 24 bit

files use one and a half times the disk space of comparable 16 bit files.

Software Monitoring

This option allows you to switch Software Monitoring (listening to the actual input

signal) on or off. Please note that with Software Monitoring active, the audio signal is

processed via software—a certain amount of audible delay (commonly referred to as

“latency”) is inevitable. If you are listening to the recorded signal through your mixing

desk, or your audio hardware supports hardware monitoring, you should switch this

option off.

Process Buffer Range

This parameter determines the size of the native buffer used to compute mixes and

effects. Choose between Small, Medium, and Large buffer sizes.

Note: Larger buffer sizes will increase latency. Dependent on CPU speed, buffer sizes

that are too small might compromise real time audio processing.

ReWire behavior

When sending MIDI data to a ReWire compatible software instrument, you can choose

between four modes:

• Playback mode: use when playing back MIDI tracks via ReWire. This setting requires

less CPU power.

• Live mode: use when playing a ReWire instrument live. This settings requires more

CPU power.

Maximum Scrub Speed

Normal means the playback speed is used, Double playback speed is two times faster.

Scrub Response

This parameter determines the reaction time for audio scrubbing. Choose the value

that works best for your system configuration. Options are: Slow, Normal, Fast, Faster.

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Apple Logic Pro 7 User Manual Page 380

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