A wavetable synthesizer is controlled by dynamically determining a present CPU
loading estimate associated with a song being played by the wavetable synthesizer.
An interpolation degree is determined based on the present CPU loading estimate,
and the wavetable synthesizer is adjusted to utilize the interpolation degree when
playing the song. This technique can be used to enable the wavetable synthesizer
to generate a varying number of simultaneous voices at, for example, a highest-quality
without exceeding a predetermined maximum permissible CPU load limit.