Subject: Re: [AUDITORY] event triggering ABR systems From: Bob Masta <audio@xxxxxxxx> Date: Fri, 21 Dec 2018 08:24:20 -0500 List-Archive:<http://lists.mcgill.ca/scripts/wa.exe?LIST=AUDITORY>Not sure exactly what you are looking for, but you might want to consider my Daqarta system. It uses an ordinary Windows sound card (including USB types) and can generate any sort of stimulus you want, as well as obtaining and displaying the ABR response in real time. It includes a robust macro language to support automation of tasks, such as running sets of ABRs at various frequencies and amplitudes. Please note that Daqarta is *not* a dedicated ABR system; it's intended for all sorts of sound and vibration work. As such, the ABR is not an out-of-the-box turn-key operation, at least not the first time you use it. The first thing you will need to do is calibrate your sound card, using the built-in Auto-Calibrate feature plus Full-Scale Range calibration using an external reference. <http://www.daqarta.com/dw_cal.htm> Then you'll need to set up the desired stimulus using the built-in Generator, set the Trigger to use the generated stimulus, set Input sensitivity, set the Averager parameters (number of frames, artifact rejection levels, etc), and finally hit the Averager button to obtain the ABR. Those settings will all be saved for future sessions, so the next time you'll just have to toggle on the Generator and Input buttons and then hit Averager. Or write a macro that does all this and much more. If your question referred to simply using an external trigger source (without external stimulus generation), that's also possible using Daqarta's remote control features: <http://www.daqarta.com/dw_ooxx.htm> But you'll need to write some code to get your external trigger to issue a command. The next release of Daqarta (in a couple of months) will include support for USB serial-port-type devices like Arduino and Numato cards, which can be used as triggers based on TTL-type levels. If you let me know more details about your exact needs, I may be able to suggest a specific solution. I'll also be glad to help with creating macros. There are lots of examples included with Daqarta, but it never hurts to get custom help. Best regards, Bob Masta =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D On 20 Dec 2018 at 12:39, David Jackson Morris wrote: > > Dear list, > > Does anyone have any experience triggering ABR systems to run brief (i.e= . <1s) tone burst > stimulate/record sequences via events from a parallel or USB port? > > Are there any medical or research grade products that anyone would recom= mend? > > Seasons Greetings > David > > > David Jackson Morris > Associate Professor - Lektor > =A0 > University of Copenhagen - K=F8benhavns Universitet > Department of Nordic Studies and Linguistics - Institut for Nordiske Stu= dier og Sprogvidenskab > Speech Pathology and Audiology - Audiologop=E6di > Emil Holms Kanal 2 > 2300 K=F8benhavn S=A0 > DIR +46734351878 > Office 22.5.14 > Homepage department =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D