I recently received an e-mail from a reader, Raul, whose daughter is deaf in one ear. She loves music, but with headphones she'd only get one channel. While my initial thought was for a fairly simple ...

At my church we have a laptop with a 1/8" stereo headphone jack. I want to send the audio from that jack to the mixer. We have a special A/V direct box that we sometimes use for a VCR or DVD player, ...

I am on a lot of conference calls at work. The call quality of people dialing in is increasingly poor - bad cell phone quality, noise from driving, line noise, echoes from speaker phone use, poor ...