@ tonicooperi If u take a bit of time to read the page on tyners, there is the answer to ur question:
"It reads and writes up to 3 tracks of data, e.g. decoding/encoding and verifying up to 3 tracks of data simultaneously."
Btw. all writers on the market(excepting the makstripe writer from maki gmbh) have an 7811 iso compliant chip for encoding and decoding magstripe info.