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check the lead/s for this edirol make sure it has a secure connection and that its not faulty have you tried to see it in the device manager control panel admistrive tools,computer management,device manager you could see a yellow question mark? right click to reinstall drivers or in the device manager scroll to disk drives + to expand right click on the drive select properties then select enable this device from the drop down list you can also select the driver to update,rollback,uninstall also under policies optimize for quick removal,optimize for performance,restore defaults
hope this helps
1 Right click my computer.
4 Device manager.
Check you have no yellow asterisks next to any of the sound,video and game controllers, if you have right click and uninstall. Reboot the system wizard should find new hardware and reinstall the driver correctly. The computer may well be a Compaq but the sound card will be something else i.e., a sound blaster or something you need to know what card it is to get the correct driver.
If the sound has worked previously the computer should still have the correct driver in it and uninstalling and reinstalling should work.
Is the computer a laptop with a built in sound card or a workstation and you are trying to activate a sound card you have installed i.e., not the one built into the motherboard?
Compaq is normally a workstation not a laptop anyway let me know and I will try and advise you further.
Is the noise a constant hum? If it is such a noise, I suspect a faulty or poor performing power supply. Check the power supply that powers Edirol sound card for any improper ground. Another custom made power supply which is properly regulated (voltage) and at a higher ampere rate would be an idea to consider. I think your main issue is grounding because you say the case become worse when the MacBook PSU is not there. Because, you are loosing a ground path when you remove the PSU. Then it solely depends on the Edirol ground path. If that path not a good source of ground, there lies your problem.
Right, it uses a fiber optic cable that connects to the "Digital Out" on your computer. There is "harmonic distortion" with the use of the RCA cables; the louder the output volume the greater the distortion. When using the "Digital Audio Cable" the is only pure data signal, aka DSP (Digital Signal Processing), because the two devices communicate with Infrared light flashes through the fiber optic cable; trust me you can hear the difference. You may need to buy one of those cables if your receiver did not come with one.
Checkout Realtek website for latest drivers. Type "
Realtek ALC260" in search bar at this website. www.realtek.com or this link below http://www.driverskit.com/freedownload/Sound_Card/Realtek/ALC880_ALC260_ALC861_HD_R1_09/15315.html