[Audacity-nyquist] Can data be imported, from text or Excel file?

[paul b. <sni...@fa...>]

Can data be imported from a text or Excel file to create a wave file? 
For example, a forced Van der Pol equation can be ploted by the Euler
tangent method; the increments chosen so that the waveform looks like a
clarinet. 

There is a bit of technical problem here, aside from the original
question.
Generally frequency is taken for granted; but it is uncertain and tricky
to calculate for a nonlinear equation.
-- 
  paul beach
  sni...@fa...