function [out] = trinote (len, note)
%trinote
%  out = trinote (len, note)
  
bpm = 120;  
nscale = 0;
if (evalin ('base', 'exist(''params'')'))
  params = evalin ('base', 'params');
  bpm = params.bpm;
  samprate = params.samprate;
  nscale = params.nscale;
end

freq = (2 ^ (((note + nscale) - 69) / 12) * 440);
secs = len * (4 * (1 / (bpm / 60)));

tout = trifreq (secs, freq);
out = zeros (2, (length (tout)));
out(1,:) = tout;
out(2,:) = tout;