User manual M-AUDIO DIO 2448

[. . . ] Delta DiO-2448 Manual version: D2448-110901 Table Of Contents Introduction . . 22 Introduction Thank you for purchasing the DiO 2448 PCI Digital I/O Card by M Audio. Please take the time to read this instruction manual -- we want you to get the most out of your DiO 2448. This manual contains valuable information on how to install, configure and operate your card. [. . . ] You may close or minimize your DiO 2448 Control Panel and proceed to your music recording application. If the DiO 2448 does not see a valid S/PDIF signal at one of the S/PDIF inputs, you will receive a DiO 2448 Audio Driver Alert stating that "S/PDIF recording doesn't work. Verify your S/PDIF in connection to the DiO 2448 then try again. " Check your connections to the DiO inputs, make sure your source is in play mode, and click OK. If there is still no valid signal at the S/PDIF input, you will receive another message stating "Error, there is no S/PDIF signal for testing. " Click OK, then recheck your S/PDIF source and connections. Windows Sound System Provided with the Windows operating system is the Windows Sound System (WSS) software. Many sound cards use the WSS mixer to control input and output levels. The DiO 2448 uses the WSS mixer for controlling levels to its Analog outputs only. If there is more than one audio card installed in your computer, you may prefer the mixer to default to the DiO 2448. In the Audio Properties page, set the Playback and Record devices to the DiO 2448 playback and record devices. At the Windows Start menu select Programs | Accessories | Entertainment (or `Multimedia' in Windows 95) | Volume Control. Double-click your mouse on the little "speaker" icon on the Windows taskbar. If this speaker icon is not present on your taskbar, you may enable it by selecting Settings | Control Panel | Multimedia from the Windows Start menu, checking "Show volume control on the taskbar" and clicking the "OK" button. From Settings | Control Panel | Multimedia Properties | Audio, click on the icon to the left of the playback device to bring up the playback mixer. 3. Once open, you may view and adjust the mixer that controls the Analog outputs. The leftmost fader controls the overall output level to the Analog outputs; this "Volume Control" fader is a master volume control that adjusts the overall level of the S/PDIF In monitor, WAV software playback, and analog CD-ROM input. 12 The middle fader "Wave Output" controls the level of the WAV software playback, prior to the master volume fader. The rightmost fader "CD Audio" controls the monitor level of the analog CD-ROM input, again prior to the master volume fader. NOTE: If these three controls do not appear in the WSS mixer, then you must go into the WSS program settings and configure them properly. Find the list box at the bottom named "Show the following volume controls:" and from within this list check only the items `Volume Control', `Wave Output' and `CD Audio'. You should now see only the three devices. Typical DiO 2448 Setup Now that we've visited the DiO 2448 Control Panel and WSS mixer, let's look at a setup that involves a typical transfer of information from DAT-tocomputer and then computer-to-DAT. NOTE: Because improper connections can potentially make very loud noises, it's a good idea to have monitor levels down while hooking up audio equipment. You may even choose to have your computer turned off before making the connections. In this example, we'll connect a DAT to the DiO 2448 coaxial S/PDIF input using a coaxial cable (typically RCA-to-RCA type, 75-ohm impedance). We'll also hook the analog outputs of the DiO 2448 to a sound system for monitoring purposes. A setup like this may be used if you were transferring 13 a number of mixes from a DAT into an editing program, performing the appropriate edits, and transferring the edited material back to DAT. Transferring From DAT TO DiO 2448 1. Connect the DAT coaxial S/PDIF output to the DiO 2448 coaxial S/PDIF Input using a good quality digital cable. Since only one S/PDIF input may be active at a time, leave the DiO 2448 optical S/PDIF input disconnected. [. . . ] Possible Solution: Some accelerated graphics cards use excessive amounts of system bandwidth, preventing the recording buffer of an audio card from keeping up with demand. Reducing or turning off the graphics acceleration feature of the graphics card may often solve this problem. In Windows, this is accessed from Settings | Control Panel | System | Performance | Graphics. Problem: Audio recorded or monitored from the S/PDIF inputs is extremely distorted and/or noisy. [. . . ]