Slide with soundin and image: audio size issues

[David McFarlane]

Sylvain,

Well done.  A lot of detail there, and I think I see the clue in your 
final paragraph -- it looks like you have stumbled into the new 
Generate PreRun = TopOfProcedure "gotcha" that can hit the last 
object in a Procedure, see 
http://www.pstnet.com/support/kb.asp?TopicID=3299 and 
http://www.pstnet.com/support/kb.asp?TopicID=2627 .

In short, you might fix this either by using PreRelease = 0, as you 
did, or setting Generate PreRun to BeforeObjectRun.

One of us should add your observation as a comment to those KB 
articles.  Thanks for presenting & pursuing this.

-----
David McFarlane
E-Prime training 
online:  http://psychology.msu.edu/Workshops_Courses/eprime.aspx
Twitter:  @EPrimeMaster (https://twitter.com/EPrimeMaster)


At 2/22/2013 01:02 PM Friday, Sylvain wrote:
>Hello David,
>
>Thank you for your answer!
>
>It worked with the sleep(ITI) once set as more than 1000 ms, however 
>I did several other tests:
>
>- I replaced my Sleep(ITI) with a TextDisplayITI of random duration 
>(between 500 and 1200 ms), with no pre-release;
>- I launched an E-Test Run to hundred of trials.
>
>My result are as follow:
>- if I add the Slide.RT (the slide with the two sub-objects) to 
>TextDisplayITI.duration, then if the total is inferior to almost 
>1000 ms, the generated wav will be less than 1000 ms;
>- if the sum is superior to 1000 ms, I will get a wav file of 1000 ms.
>
>Now something interesting:
>
>- if I set the TextDisplayITI pre-release to more than 0 ms (I tried 
>with same duration), my wav files are then less than 1000 ms!
>So I thought that it might be due to the fact that adding a 
>pre-release changed the TextDisplayITI.offsettime, and that the wav 
>could stop at the point of this offset. The other hypothesis was 
>that maybe, since the TextDisplayITI was the last slide of the 
>trial, looping to the beginning another trial could stop the wav 
>file. So to check that I added a Sleep at the very end of the trial 
>of 1000 ms, while keeping TextDisplayITI with a pre-release of same 
>duration. Doing that it gives me wav of 1000 ms.
>
>My guess is then that adding a pre-release to TextDisplayITI is 
>changing the TextDisplayITI.offsettime, and it induces a computation 
>start of the next loop earlier. And this cause a stop in the 
>recording of the wav of the previous trial.
>
>Sylvain
>
>On Friday, February 22, 2013 5:44:13 PM UTC+1, McFarlane, David wrote:
>Sylvain,
>
>This all looks good to me, so I have no idea why it does not work for
>you -- in my experience, with SoundIn Buffer Size set to 1000 and
>other settings such as in your example, I get a full 1000 ms of sound
>recording.  Using a Sleep inline for the ITI should make no
>difference, but by now you should have done that exercise for
>yourself (and reported back here with your results).  So something
>else must be going on, or maybe someone else here has a clue.  (Note
>BTW that End Capture Action did not work in EP2.0.8.90, see
><http://www.pstnet.com/forum/Topic5473-12-1.aspx>http://www.pstnet.com/forum/Topic5473-12-1.aspx 
>.)
>
>So you should just submit this to PST Web Support, see stock reminder below.
>
>-----
>David McFarlane
>E-Prime training
>online: 
><http://psychology.msu.edu/Workshops_Courses/eprime.aspx>http://psychology.msu.edu/Workshops_Courses/eprime.aspx 
>
>Twitter:  @EPrimeMaster 
>(<https://twitter.com/EPrimeMaster>https://twitter.com/EPrimeMaster)
>
>/----
>Stock reminder:  1) I do not work for PST.  2) PST's trained staff
>take any and all questions at
><http://support.pstnet.com/e%2Dprime/support/login.asp>http://support.pstnet.com/e%2Dprime/support/login.asp 
>, and they
>strive to respond to all requests in 24-48 hours, so make full use of
>it.  3) In addition, PST offers several instructional videos on their
>YouTube channel 
>(<http://www.youtube.com/user/PSTNET>http://www.youtube.com/user/PSTNET 
>).  4) If you do
>get an answer from PST staff, please extend the courtesy of posting
>their reply back here for the sake of others.
>\----
>
>
>At 2/21/2013 07:26 PM Thursday, Sylvain wrote:
> >I have a problem with the latest version of EP2(2.0.10.242).
> >A typical trial procedure is as follow:
> >
> >- first a fixation cross appear for a duration of 200 ms
> >(pre-realease set at the stim duration);
> >
> >- then a blank screen of a jittered duration appears (the jittered
> >duration has been computed before, not online, the pre-realease is
> >set also at the stim duration);
> >
> >- then a Slide appear with two sub-objet: an image and a
> >SlideSoundIn. I want my participants to give the name of the image,
> >taking advantage of the SRS box vocal responses, and have the Slide
> >disappearing; but I also want to record, with the SlideSoundIn
> >sub-object, the whole signal audio. I set the duration of the Slide
> >to 1000 ms maximum, and for the SlideSoundIn I've chosen a buffer of
> >1000 ms, set "Stop after" to no, and "EndSoundCaptureAction" to
> >none. However, I notice that when I do that, automatically I see the
> >"Stop after mode" staying on "NextOnsetTime" (pre-realease for the
> >slide set at the stim duration);
> >
> >- then an ITI of 1 sec appears (pre-realease for the slide set at
> >the stim duration).
> >
> >Doing that, I noticed that my audio signal from the SlideSoundIn
> >sub-object always ended before reaching 1000 ms.
> >
> >My question are:
> >
> >1) Do you think that even though I set the "Stop after" of the
> >SlideSoundIn to "no" (I'm 100% sure I did that, several times) the
> >recording could stop during the ITI onset or pre-realease of it? If
> >not, what could have I done wrong?
> >
> >2) In order to get rid of this issue, I replaced the ITI screen by a
> >sleep inline. Does the recording of the SlideSoundIn continue during
> >a sleep? Maybe it could be a solution to this issue.
> >
> >Thank you for any advices and answers.
> >
> >Sylvain

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