I currently use an SAT, but used a Yamaha PT-100 for 2 years prior to that. I learned aural tuning, and tuned strictly aurally for 11 years prior. The PT-100 is an inexpensive(relatively) introduction to ETD's. Maybe you could find a used one as they are no longer available. This would be a minimum, as I'm not sure if the Korg has built in scales. Once you learn the modifications necessary to the internal scales, the Yamaha does a very acceptable job David. David C. Brown RPT School of Music The University of Texas at Austin dcbrown.mail.utexas.edu
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