Re: tapping hardware & software (Christian Uhle )


Subject: Re: tapping hardware & software
From:    Christian Uhle  <Christian.Uhle@xxxxxxxx>
Date:    Thu, 24 Mar 2011 10:15:38 +0100
List-Archive:<http://lists.mcgill.ca/scripts/wa.exe?LIST=AUDITORY>

Hi Daniele, maybe the following will work for you: Use a cheap microphone as the sensor, and record the tapping with the mic close to the tapping hand/stick/.... Playback of the stimulus and recording of the tapping can be done using PD (http://puredata.info/). The recorded tapping signal needs a bit of post-processing: Octave (http://www.gnu.org/software/octave/) can be used to filter out unwanted low-frequency noise, and to get the onset times of each tap (with a processing similar to note onset detection, but simple local maxima search and thresholding and having a condition of a minimum tap interval can work well, depending on your recording situation). From octave, you can export the onset times (or the intervals between stimuli and onset, or ...) into a text-file or something like this, and import into your analysis software. Or you use octave for the analysis. All the best Christian Am 24.03.2011 09:32, schrieb daniele schon: > Dear all, > I am trying to think to a simple and cheap solution to record children > in a tapping task (eg along with a metronome or a piece of music). > I have up to now found several solutions commonly used, but none of > them is cheap. For instance, using a software such as Presentation to > send the auditory stimulus and record with the space bar (requires > Presentation/E-Prime license), or using Cakewalk and a tapping pad > (requires Cakewalk license and a tapping pad). > So I would be glad if you could share your advice on the "optimal" > solution, optimizing the real cost (in euros), the precision (in > milliseconds) and the other cost (the hours I'll spend analyzing data, > for instance recording the tapping on a microphone ...). > > my warmest regards > daniele > -- Dr.-Ing. Christian Uhle IIS Labs Dept. Audio Fraunhofer Institute for Integrated Circuits IIS Am Wolfsmantel 33 91058 Erlangen Germany E-mail: christian.uhle@xxxxxxxx Phone: +49(0) 9131 / 776 - 6230 Fax: +49(0) 9131 / 776 - 6099 http://www.iis.fraunhofer.de/amm/ Meet us at these events: Workshop Digital Broadcasting, September 15-16, 2010 CEATEC Tokyo, Oktober 06-09, 2010 Medientage Munich, Oktober 13-15, 2010 ...


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