My first arranger keyboard was a Lowrey Micro Genie, about 1975 or 76. The software was extra and about the size of the 4 tracks we used to have. You plugged it into a slot in the keyboard and you had about 4 or 5 styles. Without the software you had Piano and maybe 12 or 15 other voices you could play. It was stereo. It cost 2600.00 and you could buy a pair of 35 watt amps with EQ's for another 225.00 each. The software styles were about 100.00 each.
AND...............I still have it and it still works.
Tonight I have ordered my very last Arranger Keyboard the Tyros 2 from Dan O'neil in Baltimore.
Bebop