Guest guest Posted April 17, 2007 Report Share Posted April 17, 2007 Dan, audiostrobe units in conjunction with goggles (there are several, e.g. "Synergizer" in www.tc-softworks.com) are driven by audio-files (.wav or .mp3) produced by a software (e.g. "Mindexplorer) which delivers such light-sound files. Bioexplorer's audioplayer can play these files. So, you make these files playing dependent on your thresholds. Uwe Quote Link to comment Share on other sites More sharing options...
Guest guest Posted April 17, 2007 Report Share Posted April 17, 2007 It will produce an audio output which can be converted into a visual strobe like effect. I use the QDS system which works fine with BE (http://www.qeeg.com.ar/default1.htm)On Apr 17, 2007, at 1:43 PM, Dan Maust wrote:I'm in process of switching to BioExplorer and want to try EEG basedphotic stim. Will BioExplorer drive an audiostrobe unit?THanks,Dan Goldringpaul.goldring1@... Quote Link to comment Share on other sites More sharing options...
Guest guest Posted April 17, 2007 Report Share Posted April 17, 2007 That much I'm aware of. The question is will BE drive audiostrobe, or is it something different? I have lots of audiostrobe equipment so am trying to figure out if I need the QDS photostim equipment or not. Thanks, Dan -- In braintrainer , Goldring wrote: > > It will produce an audio output which can be converted into a visual > strobe like effect. I use the QDS system which works fine with BE > (http://www.qeeg.com.ar/default1.htm) > > > > I'm in process of switching to BioExplorer and want to try EEG based > > photic stim. Will BioExplorer drive an audiostrobe unit? > > > > THanks, > > > > Dan > > > > > > > > Goldring > paul.goldring1@... > Quote Link to comment Share on other sites More sharing options...
Guest guest Posted April 17, 2007 Report Share Posted April 17, 2007 Dan, The audio components of BE are not capable of doing this yet. I did ask Larry J about it a while back but I am not sure if it went on the " to do " list or not > That much I'm aware of. The question is will BE drive audiostrobe, or > is it something different? I have lots of audiostrobe equipment so am > trying to figure out if I need the QDS photostim equipment or not. > > Thanks, > > Dan > > -- In braintrainer , Goldring > wrote: >> >> It will produce an audio output which can be converted into a > visual >> strobe like effect. I use the QDS system which works fine with BE >> (http://www.qeeg.com.ar/default1.htm) >> >> >>> I'm in process of switching to BioExplorer and want to try EEG > based >>> photic stim. Will BioExplorer drive an audiostrobe unit? >>> >>> THanks, >>> >>> Dan >>> >>> >>> >> >> Goldring >> paul.goldring1@... >> > > > > > > Quote Link to comment Share on other sites More sharing options...
Guest guest Posted April 17, 2007 Report Share Posted April 17, 2007 This will work but does not provide robust tracking of EEG values as it would be an immense effort to include the number of audio players that would be necessary. You could program an Audio strobe file for a sweep or some such however. Dan, audiostrobe units in conjunction with goggles (there are several, e.g. "Synergizer" in www.tc-softworks.com) are driven by audio-files (.wav or .mp3) produced by a software (e.g. "Mindexplorer) which delivers such light-sound files. Bioexplorer's audioplayer can play these files. So, you make these files playing dependent on your thresholds. Uwe --- USFamily.Net - $8.25/mo! -- Highspeed - $19.99/mo! --- Quote Link to comment Share on other sites More sharing options...
Guest guest Posted April 18, 2007 Report Share Posted April 18, 2007 Interesting info. Thanks. I just installed BioExplorer on my computer - now for the steep learning curve....... Dan > > Hi Dan - if you're interested in making your own, here's a fairly simple > circuit that takes the audio output from a PC sound card / BioExplorer and > flashes LEDs accordingly. > > http://www.flickr.com/photos/ianmc333/458476227/ > > I've found that many MP3 players and PC sound cards can produce signals down > to 4Hz or lower...at least strong enough to drive this design. I put two > super bright white LED's into some swimming goggles and it all works quite > well -- at least well enough for me to detect the photic driving in the EEG > signal at the back of my head (P4). It cost me maybe $15 in parts and a > couple hours bench testing and building. > > Mileage may vary but I would think most sound cards could do at least 5Hz > and above. Using MP3 files on my Treo cell phone I can generate 3Hz > flashes. And using Bioexplorer's tone object I can pulse the LED's as low > as 1Hz from my PC's el-cheapo integrated sound card. > > And more interestingly, I built a Bioexplorer design which takes the > peak-alpha-frequency value and creates a corresponding tone output at that > same frequency...in effect having the goggles pulse at my PAF..or at say an > offset(ie: PAF+2Hz). I haven't worked much with this yet but learning > Bioexplorer is a pretty cool little app. Fun stuff. > > cheers, Ian. > Quote Link to comment Share on other sites More sharing options...
Guest guest Posted April 18, 2007 Report Share Posted April 18, 2007 I recently figured out how to interface to the server object. I could cobble together an audiostrobe driver if there is enough interest from the users on the list. Basically, I could write something that could take as its input a frequency, and then output the corresponding audiostrobe waveforms. The only gotcha would be if you were already using your sound card for audio feedback. There are cheap USB soundcards for $10 or so out there, though, that you could use as an extra output to drive the audiostrobe. Certainly a lot cheaper than commercial photic drivers if you already have audiostrobe hardware. On the other hand, I've found that I can drive my goggles directly w/ the audio from my soundcard. If your soundcard doesn't have enough output voltage, that other poster's circuit from flickr costs only a few bucks to build. If you're not handy w/ electronics, you can just buy a cheapo headphone amp. Basically, any audio amp that can drive at least a small speaker is powerful enough to light up the goggles. Just be careful not to turn it to high, or you will burn out your LED's. > > I'm in process of switching to BioExplorer and want to try EEG based > photic stim. Will BioExplorer drive an audiostrobe unit? > > > THanks, > > Dan > Quote Link to comment Share on other sites More sharing options...
Guest guest Posted April 18, 2007 Report Share Posted April 18, 2007 I recently figured out how to interface to the server object. I could cobble together an audiostrobe driver if there is enough interest from the users on the list. Basically, I could write something that could take as its input a frequency, and then output the corresponding audiostrobe waveforms. The only gotcha would be if you were already using your sound card for audio feedback. There are cheap USB soundcards for $10 or so out there, though, that you could use as an extra output to drive the audiostrobe. Certainly a lot cheaper than commercial photic drivers if you already have audiostrobe hardware. On the other hand, I've found that I can drive my goggles directly w/ the audio from my soundcard. If your soundcard doesn't have enough output voltage, that other poster's circuit from flickr costs only a few bucks to build. If you're not handy w/ electronics, you can just buy a cheapo headphone amp. Basically, any audio amp that can drive at least a small speaker is powerful enough to light up the goggles. Just be careful not to turn it to high, or you will burn out your LED's. > > I'm in process of switching to BioExplorer and want to try EEG based > photic stim. Will BioExplorer drive an audiostrobe unit? > > > THanks, > > Dan > Quote Link to comment Share on other sites More sharing options...
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