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timing with Play

PlayTone[F_, dur_] := Play[Sin[2*Pi*F*t], {t, 0, dur}]
allows me to play a sine wave of frequency F and duration dur

PlaySeq[L_, dur_] := Do[PlayTone[L[[i]], dur], {i, Length[L]}]

should allow me to play a sequence of tones
with a given list of frequencies L
and all the same duration dur.

It does not work at least in 4.1

all tones but the last one are much shorter than dur.

any help?

Erich Neuwirth, Computer Supported Didactics Working Group
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