Monitor Controller Owners Manual

Table Of Contents

Dierent operating systems may pose their own set of complications in setting up the m905 as the

audio playback device. In the event that ‘plug and play’ operation does not occur, you will need to look

at some specic setup variables for your OS. In this case, we will direct you to a very well written and

comprehensive docu ment by our friend and colleague Charlie Hanson from Ayre Acoustics.

http://www.ayre.com/usb.htm

This is an invaluable resource for computer/USB audio setup information for most all current operat-

ing systems, and we strongly urge you to familiarize yourself with the information pertaining to your

specic OS.

Another excellent resource is Wavelength Audio’s website: http://www.USBdacs.com

In the event that you have any setup issues which aren’t addressed by these resources, feel from to

 USING THE m905 FOR DAW PLAYBACK

With the extremely high quality audio playback achieved with this USB interface, the m905 can be great

option as an stereo output device directly from your digital audio workstation. For playback only, this

will work very well. However, using it in conjunction with other USB audio devices connected to your

workstation computer’s USB will require some adjustments to your computers audio settings and for

best results, some external clock routing between audio devices.

For Mac OS X, this is achieved by setting up the m905 in an ‘aggregate audio device’ setup, with the

m905 as the output device.

For Win 98 – Win 7, you must use ‘asio4all’ drivers- http://www.asio4all.com/. There is currently no sup-

port yet for windows 8.

With both of these setups, if you are using multiple I/O devices, you will need to pay careful attention

to clocking. In Mac / Core audio aggregate setups, you are able to set which device is the clock master.

However, this means that other devices will be sample rate converted, which we do not recommend.

15 Updating Firmware

The m905 utilizes three dierent unique processors for system and digital audio control. As indicated

in the system SETUP menu, the three processors are RCU (remote control unit processor), ACU (audio

control unit processor) and XMOS (digital audio control processor). Over time rmware updates may

become available. These can be found and downloaded from the Grace Design website at http://www.

gracedesign.com/support/support.htm. Each processor rmware is independent of the other and may

or may not be at the same revision level (check the website for the latest revision information). When-

ever rmware is updated on the system, the user should conrm that all three rmware sets are the

most current. In the event that incompatible rmware revisions are accidentally loaded on the system,

the m905 RCU will display an error message instructing to update the system rmware. The currently

loaded rmware revisions will be displayed on this message screen for reference.

Important note: Our bootloader is currently NOT compatatble with Mac OSX computers. So the upgrade

process can only be done using a Windows computer.