User manual M-AUDIO DELTA DIO 2496

[. . . ] Delta DiO-2496 Manual version: D2496-102799 Table of Contents Introduction . 3 Minimum System Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Quick Guide to Getting Started . 7 Windows Driver Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Delta Theory of Operation . 24 Introduction Congratulations on your purchase of the Delta DiO 2496 digital audio interface card, designed and built by M AudioTM. [. . . ] If somewhere in the process you become confused, you may always restore the default settings to use the card as a straight 2in 4-out device. Hardware Settings Page The Hardware Settings page of the Delta Control Panel gives you control over miscellaneous hardware and software features of the Delta DiO. To display this page, click the "Hardware Settings" tab of the Delta Control Panel. MASTER CLOCK: This section allows you to select the board's master clock source: Internal Xtal (crystal) or S/PDIF In. Master clock operation is outlined in the Synchronization section of this manual. Be sure to select "S/PDIF In" if you will be recording or monitoring an S/PDIF stream. NOTE: If "S/PDIF In" is selected as the master clock source, be sure to supply a valid S/PDIF signal to the board's active S/PDIF input. Otherwise, erratic timing and improper sample rates will be experienced. Once a master clock source has been selected, its synchronization status is continually monitored and displayed below the master clock radio buttons. If internal crystal is selected, the status display will always say "Locked. " On the other hand, if S/PDIF In is selected as the master clock source, the control panel will display "Locked" only when a valid S/PDIF signal is detected. It will display "Unlocked" when there is no signal at the selected input, or when the signal is corrupt or has become degraded for any reason. 12 CODEC SAMPLE RATE: This section is enabled only when the board is set to use the internal crystal (Internal Xtal) as the source of its master clock. It is disabled (greyed-out) when the master clock is set to S/PDIF In. This section indicates the present board sample rate, as set by application software. The sample rate selected here will be used to drive the digital mixer and all outputs. The "Rate Locked" checkbox is used to force a sample rate upon the system. It is disabled by default to allow software access to all supported sample rates. When checked, it causes the driver to only operate at the selected sample rate. This means that any application that attempts to open the Delta DiO driver at a sample rate other than the one selected here will fail to do so. "Reset Rate When Idle" is selected when you want the sample rate to return to a particular setting when a software application is not actively using the board. This is particularly handy for keeping the digital mixer running at a specific rate. NOTE: Because the digital monitor mixer runs at the sample rate of the rest of the board, and because sample rate directly affects frequency response, it may be desirable to keep the sample rate at or above 44. 1 kHz while using the monitor mixer. This is accomplished by enabling "Reset Rate When Idle" and selecting a sample rate of 44. 1 kHz or greater. S/PDIF SAMPLE RATE: This section is enabled only when the board is set to use S/PDIF In as the source of its master clock. It is disabled (greyed-out) when the master clock is set to internal crystal. When S/PDIF In is used as the master clock, the software applications need to be manually informed of the S/PDIF Input sample rate. You should select the sample rate closest to that of the S/PDIF source. [. . . ] Often this will result in a small segment of sound (0. 5 to 1 second) repeating itself over and over, sometimes completely locking up the computer. See the general troubleshooting suggestions at the beginning of this section. Problem: A third-party Windows digital audio program does not play or record to/from Delta DiO 2496. Possible Cause 1: The Delta DiO 2496 Audio driver is not properly installed. Install/reinstall all Delta DiO 2496 audio drivers (see Windows Software section). [. . . ]