Yep, I've got the mic plugged in my US 122-L Input (not the Line Input) with the Phantom power switched on, the headphones plugged into the phone jack, the US 122-L plugged into my computer's USB port and I've messed with the volume controls on my US 122-L. When I'm recording my voice I've got the Mic Line switched on and then switch it over to guitar line when I record the keyboard (I'm just using my mic to record the guitar for now...getting my acoustic electric fixed)

The playback sounds great, but I'm still missing the fresh recording sound.

My headphones can't be bad, because I've used them for playback, so I'm still not sure what to do??

Are you using a condenser microphone? You only need phantom power if you're using a condenser. Otherwise, turn that off. "WARNING Microphones should not be connected to or disconnected from the US-122L with phantom power switched on. Unbalanced dynamic microphones should never be connected to phantom powered connectors."

Do you have the Mon-MIX balance knob all the way to the left?

Did you turn the input knobs up until the SIG/OL LED lights up?

If that doesn't work, something may be wrong with the US122-L. Contact TASCAM.

Yeah, I'm using a condenser (Shure Beta 87A). That's the only reason I have Phantom on.

I've tried with the Mono-mix turned both to the left and to the right, with the switch on and off.

While recording, the SIG/OL LED lights up red, yellow, and green. I'm not sure which one I should be aiming for. If I remember right, the sounds gets distorted when the light turns green.

I record with the 122L and a condenser mike and have no probs monitoring with headphones. Presumably you've got the phones/line out control set high?

Read the US122 manual if you don't know what you're doing. Actually, Green means the level is good. Red and Yellow means the level is too high. You may have a defective unit. It should be pretty simple: connect the USB for power, mic or guitar plugged in to mic or line input, headphones plugged into phones jack. If you can't hear the mic or guitar in the phones, then the US122 is not working properly. This problem has NOTHING to do with Sonar. The problem is either the US122 or you have a bad cable somewhere.

Dyanne,
my friend a Union Stagehand had a similar issue with his 122, it drove him nuts
tried all the drivers and so forth
he ended up upgrading to a M Audio firewire unit

-JD

Finally got it working! Thanks for the help :)

Can you tell us what was the problem for future reference?

my guess Dave is he had his phones volume off...
unless he ran into that driver issue my friend from the Union encountered, but I doubt that

-JD

I would tell you what the problem was except that I don't know. I ended up unplugging everything and starting all over using the same cables and the same trial and error system as before...manual in hand just like before. The sound is not very loud in the headphones, but it's enough for me to monitor my keyboard. I don't like that when monitoring through the interface, I can't hear the tracks already recorded though. So, when recording my voice I will monitor through the computer again just so that I can hear the accompany track.

This is the set up for recording my voice while monitoring through the interface (to monitor the keyboard, I switch input lines and turn the phantom power off):
The microphone is plugged into the US122-L Mic Input and the headphones are plugged into the phones jack of the US122-L, which is plugged into my computer's USB port. The volume is turned up on the US122-L. I turned the Mon-MIX balance knob all the way to the left and turned the input knobs up until the SIG/OL LED lights up green. The phantom power is on since I'm using a condenser mic.