M-Audio Biport 2x4s [7/48] Stand alone mode

Back Panel

10. Power Connector - Accepts power from the 9 Volt DC 500 mA power

supply included with your BiPort 2x4s. If you ever need to replace

this power supply, make sure that it will supply at least 500 mA and

has the center pin positive.

11. Host In - Connects to the serial port of the host computer. For the

PC, it connects to a standard serial (COM) port; for the Mac, it con-

nects to the serial or printer port.

12. Mac Thru - Connects to a modem or printer that would normally be

connected to the serial or printer port of your Macintosh.

13. SMPTE In - Receives SMPTE time code from a tape deck or other

SMPTE source.

14. SMPTE Out - Outputs SMPTE time code to a tape deck or other

SMPTE device.

15. MIDI In-B Connector - For MIDI Input channel B, the second MIDI

input of two.

16. MIDI Outs B, C, and D - For MIDI Output channels B, C, and D (2nd,

3rd and 4th outputs of 4).

Theory of Operation

The BiPort 2x4s may act as a stand-alone SMPTE reader/writer/regener-

ator, or MIDI/SMPTE Interface to a host computer. When first powered

up, the BiPort 2x4s will assume the Stand-Alone mode. In order to enter

MIDI Interface mode, the BiPort 2x4s must be connected to either a Mac

or PC host; the host computer drivers will contact the BiPort 2x4s and

configure it for MIDI Interface mode. When the host is done using the

BiPort 2x4s in Interface Mode, you may command the BiPort 2x4s back

to Stand-Alone mode by exiting all MIDI applications.

Stand-Alone Mode

When first powered up, the BiPort will assume Stand-Alone mode. In

this mode, the BiPort operates in a similar fashion to the Midiman

Syncman

and other dedicated sync devices. It is also the mode in

which Mac Thru should be selected if desired. In Stand-Alone mode, the

9VDC

SMPTE

Host

Mac

Thru

Out

Out-DOut-COut-BIn-B

10 11 12 13 14 15