[1]In point of fact, the number of the most recent value chosen is kept in a register known as the phase accumulator, which has more precison than neccessary to handle the size table used. The high part of the p.a. points into the table, and the low bits contain the fraction. The sampling increment is added to the phase accumulator during each iteration, which will produce the appropriate stepping action.

[2]Digitally speaking, the value obtained from one wavetable lookup is added to the sampling increment for another wavetable lookup.

[3]The carrier is the oscillator we listen to; the modulator is an oscillator that changes the frequency of the carrier at an audio rate.