I'm new to computer DAW recording but have experience using dedicated multi-track digital recorders.
Anyway - this one has me frustrated and scratching my head.
My signal chain is the following:
Mic->Preamp->M-Audio Audiophile USB Interface->Mac (Logic)
My voice doubles on monitoring from the headphone jack from the Audiophile while singing/talking. However my keyboard instruments, guitars, etc.. do not double while monitoring using the same signal chain and same settings in Logic.
This really doesn't seem to make much sense I know....
Check to see if your hesdphone are assign to the ch in put
Well - the headphones are just come out of the M-Audiophile USB headphone jack - so I'm not exactly sure where in the chain they are (no control options there either). I realize this could be the problem but it just seems like I would also notice the doubling effect in the instruments (keys, guitar) but I don't. At least I don't notice it....
Could it be that you have both hardware and software monitoring turned on?