hi all- looking a cheap bass tuner, i see the korg CA1 and Snark SN5 on ebay for under $10--any advice? heres the issue, im actually DEAF!- i just had a cochlear implant done 3 weeks ago, i picked up a keyboard at the music shop to 'learn' tone and sounds, im doing quite well on it, about 40 years ago i played the bass for awhile and have a $30 junk here, however i cant hear well enough to actually tune it precisely, so im looking a cheap tuner to see if i can play the bass again- i see the snark is a clip on for vibrations, the korg has some kind of plug in type, is this used with an amp? TIA- john