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The persistent "internal portaudio" error

Christain DiCanio
 

For anyone who regularly uses Praat in research and in teaching, it is often necessary to switch between playing back audio on one's own computer and playing back audio using a classroom (or lecture hall) speaker system. While it is possible to switch the channel of audio output on one's computer when connecting to a different system (and other software recognizes this change), Praat does not allow one to change the audio port while it is open. Playing back an audio file after connecting to a different output port produces an error message: "PortAudio can not open sound output: Internal portaudio error."

So, it is always necessary to close Praat and then re-open it so that it can detect the correct sound output port. While this is always possible, it often requires re-opening sound files and that requires that all sound files in the object window be saved. If the purpose of using Praat is a class demonstration of acoustics via synthesis (or a "how to" style tutorial), needing to save all the relevant files and re-open them can be non-trivial (and a waste of time). In general, it should be possible for the correct audio port to be detected, but this seems to be a persistent bug in Praat.

Boersma Paul
 

On 11 Oct 2019, at 16:07, cdicanio@... [praat-users] <praat-users-noreply@...> wrote:

Playing back an audio file after connecting to a different output port produces an error message: "PortAudio can not open sound output: Internal portaudio error."
This will have been corrected in Praat 6.1.06.
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Paul Boersma
Professor of Phonetic Sciences, University of Amsterdam

Visiting address: Spuistraat 134, room 632, Amsterdam
Mail: P.O. Box 1642, 1000BP Amsterdam, The Netherlands
Website: http://www.fon.hum.uva.nl/paul/