Apple Soundtrack Pro 2 User Manual
Page 487
Appendix C
Working with Professional Video and Audio Equipment
487
Tips for Selecting a Third-Party Audio Interface
When you select an audio interface, make sure it has the following:
 Connectors that match your audio equipment, such as XLR, 1/4" TRS, RCA, or TOSLINK
 Support for audio signal formats that your audio equipment uses, such as AES/EBU,
S/PDIF, or ADAT Lightpipe
 Enough audio inputs and outputs to connect your equipment
 Sample rate and bit depth at least as high as your audio equipment. For example, if
you have an audio device with a sample rate of 96 kHz and 24 bits, your audio
interface should at least match this.
Note: Soundtrack Pro supports input from digital audio interfaces up to a maximum
sample rate of 96 kHz and a maximum bit depth of 24 bits. If you connect an
interface that uses sample rates or bit depths outside the range supported by
Soundtrack Pro, an alert message appears, telling you that data from the audio
interface is not compatible with the application.
 Mac OS X compatibility. When choosing an audio interface, check the manufacturer’s
specifications to make sure the interface is compatible with Mac OS X.
 Up-to-date driver software, if needed. If the device requires a driver, make sure an
up-to-date driver is included with the device, or is available from the manufacturer.
Important:
If you are considering purchasing an interface, make sure it supports
Mac OS X Core Audio. Soundtrack Pro supports any audio interface that is compatible
with Mac OS X Core Audio.
All digital audio interfaces can be susceptible to latency, a noticeable delay between
the time the audio signal is produced and the time you hear it. When connecting an
audio interface, you should connect the interface directly to the computer, rather than
connecting it through a hub or daisy-chaining it through another device. Connecting
an audio interface through a hub or an intermediary device can cause an unacceptable
amount of latency, particularly with slower protocols such as USB.