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Clarify limitations of 'Open' for PsychPortAudio #14

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Clarify limitations of 'Open' for PsychPortAudio #14

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9 changes: 5 additions & 4 deletions docs/PsychPortAudio-Open.md
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Expand Up @@ -6,10 +6,11 @@ pahandle = PsychPortAudio('Open' [, deviceid][, mode][, reqlatencyclass][, freq]
Open a [PortAudio](PortAudio) audio device and initialize it. Returns a 'pahandle' device
handle for the device.

On most operating systems you can open each physical sound device only once per
running session. If you feel the need to call 'Open' multiple times on the same
audio device, read the section about slave devices and the help 'PsychPortAudio
[OpenSlave](OpenSlave)?' instead for a suitable solution.
On most operating systems you can open only one stream at a time for each
physical device. If you feel the need to call 'Open' multiple times on the same
audio device without calling 'Close' in-between, read the section about slave
devices and the help 'PsychPortAudio [OpenSlave](PsychPortAudio-OpenSlave)?'
instead for a suitable solution.
All parameters are optional and have reasonable defaults. 'deviceid' Index to
select amongst multiple logical audio devices supported by [PortAudio](PortAudio). Defaults
to whatever the systems default sound device is. Different device id's may
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