Edirol USB Audio/MIDI Interface UA-20 User Manual

Getting Connected and Installing Drivers (Macintosh)

You must install the MIDI driver even if you will be using 
only audio on the UA-20. 

 

before you install the ASIO driver.
This section explains how to install the ASIO driver that 
allows the UA-20 to be used by your sequencer software or 
audio editing software. For details on installation and settings 
of the ASIO driver, be sure to also read the 

 document on the 

.

The ASIO driver of the UA-20 supports the following audio 
input/output channels.

• Audio input .......24/16 bit1 stereo ch. (2 monaural chs.)
• Audio output.....24/16 bit1 stereo ch. (2 monaural chs.)

Here we will explain how to install the ASIO 1.0 16 bit-
compatible driver.

 (Steinberg Audio Stream 

In/Out Interface)
This is an audio interface 
standard promoted by the 
Steinberg Corporation. When 
the UA-20 is used with ASIO-
compatible software, the 
synchronization precision will 
be improved, allowing a more 
sophisticated music 
production environment.

In Advanced mode, the UA-20 cannot play back audio data 
from the Macintosh’s sound manager (such as audio CDs and 
alert sounds).

If your ASIO-compatible software supports ASIO 2.0 or recording/
playback of 24 bit audio data, using the following drivers will provide a 
higher quality environment. 

Driver to use

✕

✕

UA-20 ASIO 1.0 16 bit

✕

❍

UA-20 ASIO 1.0 24 bit

❍

✕

UA-20 ASIO 2.0 16 bit

❍

❍

UA-20 ASIO 2.0 24 bit