the time of the 'beep' function

[hangue.jo]

Thank you

I decide to use SoundBuffer.Play method hoping that its presents the sound 
on precise time, I have no good electronic ear (device) to measure.
Truly, I don't need so high resolution of tone. Anyway thank you for the 
attachment.


HanGue.

On Friday, April 20, 2012 3:46:02 PM UTC+2, Michiel Sovijärvi-Spapé wrote:
>
> Thanks for the heads up, glad you enjoyed the listening experience and I'm 
> happy it got through. It did take about 4 minutes to generate, including 
> download of the demo version of syntrillium cooledit, so I expect to be 
> included as co-author!*
>
> Michiel
>
>  
>
> *Really? No, not really.
>
>  
>
>  
>
> *From:* e-prime at googlegroups.com [mailto:e-prime at googlegroups.com] *On 
> Behalf Of *Peter Quain
> *Sent:* 20 April 2012 16:36
> *To:* e-prime at googlegroups.com
> *Subject:* RE: the time of the 'beep' function
>
>  
>
>
> that is a cool tone
>
> At 11:25 PM 20/04/2012, you wrote:
>
> Scientists,
> 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. 
> Hope it'll be actually attached after i send it to g-groups.
> Best,
> Michiel
>  
> *From:* e-prime at googlegroups.com [ mailto:e-prime at googlegroups.com<e-prime at googlegroups.com>] 
> *On Behalf Of *Michiel Sovijarvi-Spape
> *Sent:* 20 April 2012 16:09
> *To:* e-prime at googlegroups.com
> *Subject:* RE: the time of the 'beep' function
>  
> Hi,
> No. In fact, it will say explicitly in your e-basic help file that the 
> Beep function **should never be used** 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 *around the 3rd 
> second*, maybe, a picture of *unknown quality, size and colour* was shown 
> to the subjects *for a bit*", literally. 
> 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).
>  
> 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.
> Cheers,
> Michiel
>  
>  
>  
> *From:* e-prime at googlegroups.com [ mailto:e-prime at googlegroups.com<e-prime at googlegroups.com>] 
> *On Behalf Of *hangue jo
> *Sent:* 20 April 2012 11:43
> *To:* e-prime at googlegroups.com
> *Subject:* the time of the 'beep' function
>  
> Hi there,
>
> Is there anybody figure out how to measure the onset time of the beep?
> Is this code below report the exact onset time of beep in milisecond unit 
> (with trigger signal to sync to the recording computer)?
>
> Beep
> WritePort &H378, 1
> BeepTime = Clock.Read
>
> I can't use Slide object because of my whole stimuli was conducted in 
> InLine (made an animation using Canvas).
> Thank you.
>
> Best,
> HanGue Jo.
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