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<br>
that is a cool tone<br><br>
At 11:25 PM 20/04/2012, you wrote:<br>
<blockquote type=cite class=cite cite="">Scientists,<br>
Well, there we go. Here's the very ultimate in timing: 100 ms
16bit/stereo (which is useless)/44.1Khz wave-form with envelope of 10 ms
stochastic fade in/fade out (to avoid clicks). Please use this if you
want a real beep or want some sound to demarcate an event or something.
<br>
Hope it'll be actually attached after i send it to g-groups.<br>
Best,<br>
Michiel<br>
<br>
<b>From:</b> e-prime@googlegroups.com
[<a href="mailto:e-prime@googlegroups.com" eudora="autourl">
mailto:e-prime@googlegroups.com</a>] <b>On Behalf Of </b>Michiel
Sovijarvi-Spape<br>
<b>Sent:</b> 20 April 2012 16:09<br>
<b>To:</b> e-prime@googlegroups.com<br>
<b>Subject:</b> RE: the time of the 'beep' function<br>
<br>
Hi,<br>
No. In fact, it will say explicitly in your e-basic help file that the
Beep function *<b>should never be used</b>* for stimulus presentation.
This is because E-Prime cannot guarantee the onset time of the beep - the
only thing your function below does is measuring when E-Prime starts to
send the call to beep to Windows (if I'm not mistaken). It will then take
X ms until your internal speaker starts beeping. For that matter, what
beep is it? How long in ms? Is there a fade in or does it start at full
amplitude? What frequency? dB? If you can't know this (and you'd have to
measure it with a microphone), it is exactly the same as saying
"Somewhere <u>around the 3rd second</u>, maybe, a picture of
<u>unknown quality, size and colour</u> was shown to the subjects <u>for
a bit</u>", literally. <br>
Anyway, so you might find out, with an electronic ear and such, but you
could take the easy path and just record a precise tone using something
like cooledit. PST can, given conditions, guarantee ('ish) accurate
timing for sound-files, just not for beeps (correct me if I'm
wrong).<br>
<br>
To be fair, I don't know why they don't just provide an inbuilt function
to play a 1s 1000 Hz sine wave tone and name the sub to
play("MichsCoolTone.wav") beep. I think people can spare the
few bytes of memory involved in keeping that permanently in memory.<br>
Cheers,<br>
Michiel<br>
<br>
<br>
<br>
<b>From:</b>
<a href="mailto:e-prime@googlegroups.com">e-prime@googlegroups.com</a>
[<a href="mailto:e-prime@googlegroups.com" eudora="autourl">
mailto:e-prime@googlegroups.com</a>] <b>On Behalf Of </b>hangue jo<br>
<b>Sent:</b> 20 April 2012 11:43<br>
<b>To:</b>
<a href="mailto:e-prime@googlegroups.com">e-prime@googlegroups.com</a><br>
<b>Subject:</b> the time of the 'beep' function<br>
<br>
Hi there,<br><br>
Is there anybody figure out how to measure the onset time of the
beep?<br>
Is this code below report the exact onset time of beep in milisecond unit
(with trigger signal to sync to the recording computer)?<br><br>
Beep<br>
WritePort &H378, 1<br>
BeepTime = Clock.Read<br><br>
I can't use Slide object because of my whole stimuli was conducted in
InLine (made an animation using Canvas).<br>
Thank you.<br><br>
Best,<br>
HanGue Jo.<br>
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