Edirol USB Audio/MIDI Interface UA-20 User Manual

If you are using a Windows computer, please proceed to 

fig.05-1e_50

A “driver” is software that 
transfers data between the 
UA-20 and application 
software running on your 
computer, when your 
computer and the UA-20 
are connected by a USB 
cable. The driver sends data from your application to the UA-20, and from the 
UA-20 to your application.

The UA-20 has two operating modes, 

 and 

, and a different driver is used by each mode.

■

The UA-20 will operate in this mode when the rear panel 

 is turned 

. The special driver included on the CD-ROM will be used, 

allowing audio to be recorded/played/edited with high quality and stable timing. 
In Advanced mode, audio signals can be transferred between the UA-20 and the 
computer at a resolution of 

 and sampling frequencies of 

. 

Select 

 if you are using an application that is able to record/

playback/edit high-quality audio, such as a 

 or an 

 such as Cubase VST, Logic Audio, and Metro. 

In Advanced mode, the UA-20 cannot play back audio data (audio CDs or warning 
sounds) from the Macintosh sound manager.
(➝ 

■

The UA-20 will operate in this mode when the rear panel 

 is turned 

. The standard USB audio driver included with MacOS will be 

used. In standard driver mode, audio signals are transferred between the UA-20 
and the computer at a resolution of 

 and sampling frequencies of 

. 

Select this mode if you are using an application that uses MacOS’s own 
functionality, such as an application that uses the computer’s CD-ROM drive to 
play back CD-audio, or an application that uses the software synthesizer included 
with MacOS. The standard driver included with MacOS does not support ASIO.
Note also that the use of Mac OS 8.6 is not supported. 
(➝ 

Application

USB

driver

Computer

USB cable

USB port