How can setup for karaoke singing to get the best sound

You'll need to connect both your PC and the Mic to the mixer, you'll need phantom power switched on at the mixer for the mic to work, you then take the two track out to the Aux input on the receiver.

I think the assignable jack is for pedal assignable - Sustain, Soft, Sostenuto or Rhythm Start/Stop ONLY

No, this model does not support Mic input for karaoke singing.

Any luck with SYNC issue on you ET19KV?

Many of the Singing Machine Karaoke system manuals are available on the company's support site: http://www.singingmachine.com/support/instruction_manual.php . The direct link to the STVG-1009 manual is http://www.singingmachine.com/download/Instruction_Manual/2010/CDG/STVG-1009/STVG-1009%20IM%20E01%20(SMC%20US).pdf .

I hope this helps.

Cindy Wells

Here is a link for the manual. I hope this helps. Please remember to rate my answer, and any questions or comments.
http://www.singingmachine.com/download/Instruction_Manual/2010/CDG/STVG-1009/STVG-1009%20IM%20E01%20%28SMC%20US%29.pdf?PHPSESSID=1b707b6d21f85aac7afd169b9b36682d

Good Luck!
M

Note that you MUST use the special Karaoke disks to be able to remove the vocal... it will not do it for plain music CD's. Those devices that CLAIM to remove vocals often do so poorly... they do it by subtracting the left and right channels which ASSUMES the lead vocal is centered between the channels... Those methods don't work very well...

The mics on the singing machine are very low end mics and MAY not work on your other unit. The Voco has very sensitvie inputs to use with "professional" type microphones. The Singing machine mics are going to be fairly high output and likely to overload the voco inputs. Procure some professional mics like Shure, AKG, Sennheiser or others and don't forget to use a balanced to unbalanced adapter or cable on the mics.

The music to sing along with apparently MUST come from a disk played on the unit. It appears that the external audio jacks are just to use the unit as either a boombox or to drive a larger sound system. You will have to convert your IPOD music into a Karaoke compatible CD to be able to sing along with it... They probably detect MIC input and mute any incoming signals from the RCA jack inputs,

look for an option on it that un-mutes the the background sound.

NOT CONNECTED PROPERLY OR NEED BATTERIES.