Propellerhead Reason - 2.0 Manual de Operações descarregar pdf (Página 255)

About Audio on Computers

253

Macintosh Specific

Information

Mac OS X

Under Mac OS X, all communication with most audio hardware can be handled

by the internal CoreAudio framework.

You should normally use one of the driver options that start with

the word “CoreAudio”.

Select the option that corresponds to the hardware you want to use (the

built-in audio connectors or some additional audio hardware that you have

installed).

Other options may be available as well, mainly for compatibility

with all possible hardware/software configurations.

You should only use these when required.

Mac OS 9

Under Mac OS 9 there are two ways you can play back audio:

• Using the Sound Manager

• Using ASIO

What the Sound Manager does/is

The Sound Manager is a set of software routines in the Mac OS. These routines

take care of everything related to sound. If you are using the internal audio on

your Macintosh computer you are using the Sound Manager, it is built into the

system.

One specific character of the Sound Manager is its ability to mix audio from sev-

eral applications. This means that even when you run Reason, you can run other

Sound Manager compatible applications at the same time, and they will all

sound.

Mac Audio Cards that play back via the Sound Manager

There are a rare few Mac audio cards that play back via the Sound Manager.

! If you have an audio card for your Macintosh, we strongly recom-

mend you to try and find an ASIO driver for it instead of using a

Sound Manager driver. This will give you higher reliability and per-

formance.

Mac Audio Cards with an ASIO Driver

An audio card with an ASIO driver is your best option if it is available. ASIO does

not guarantee low latency, but it allows for it if the audio card designers take ad-

vantage of its possibilities.

• Using a card via an ASIO driver can give latency figures as low as 3ms.

• When you use ASIO, only one program at a time can access the card.

• Note that to use ASIO you need to add an ASIO driver file to the ASIO Driv-

ers folder in your Reason folder.

If several program take advantage of ASIO this means you will have to dupli-

cate this driver to each program’s ASIO Driver folder.

✪ More information about ASIO can be found on Steinberg Media

Technologies’ web pages, www.steinberg.net.

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