<div dir="ltr">Hi all, <div><br></div><div>So I was fishing through all trigger-related questions in this group, but I have yet to find a solution that would help me with my problem :( I am also a newbie in running trigger so I apologize in advance if my questions look really easy... </div><div><br></div><div>So I am trying to run an experiment with a desktop computer that would send a trigger signal to another computer telling the other computer to play <u>a sound file</u> when the signal is sent. Basically the gist of the experiment is that we want the other computer to play a sound file which is a mp3 file of a metronome (120 bpm) while the main computer sends stimulation to the participant and collecting their responses. We can easily do this by playing the metronome sound file in mp3 player but we want to control when the stimulation would happen in accordance with the metronome sound so I think that is why we want to go with the trigger option. </div><div><br></div><div><ul><li>My first questions is: for the receiving end of the computer do I have to have the E-Prime experiment up and running to receive the signal from the main computer?</li></ul><div><span style="line-height: 17px;"><br></span></div><ul><li>Second question: I used Serial.WriteString SoundOut1.Play (or run) and Serial.ReadString SoundOut1.Play (or run) but E-Prime kept saying Play/Run was not a property of the object. What syntax do I have to use to signal the other computer to play the sound file? And what syntax do I have to use for receiving signal from the main computer to run the sound file when prompted? Is this why my E-prime keeps crashing whenever I tried to run the e-prime experiment for signal receiving computer? <span style="line-height: normal;">I added Serial to Device option in Experiment tab in E-Prime with correct com port and baud rate. Though, is it common to have different com port number for the main computer and the receiving computer? </span></li></ul></div><div><br></div><blockquote style="margin: 0 0 0 40px; border: none; padding: 0px;"><div>So here is the syntax for Serial.WriteString that is placed in InLine that is placed in the beginning of the experiment: </div></blockquote><div><br></div><blockquote style="margin: 0 0 0 40px; border: none; padding: 0px;"><div><div>Dim strData As String</div></div><div><div>strData = "SoundOut1.Play"</div></div><div><div>Serial.WriteString strData</div></div><div><br></div><div>Then here is the syntax for Serial.ReadString. I just copied this straight from the BasicSerial.es sample in PSTNET:</div><div><br></div><div><div>' Just hold the experiment here until some bytes</div></div><div><div>' arrive over the serial port.</div></div><div><div>Dim str As String</div></div><div><div>Dim n As Long</div></div><div><div><br></div></div><div><div>Debug.TimeStampsEnabled = True</div></div><div><div>Do While Serial.InputCount = 0</div></div><div><div>Loop</div></div><div><div><br></div></div><div><div>' Read the data that came in</div></div><div><div>n = Serial.ReadString(str)</div></div></blockquote><div><br></div><div><br></div><div><ul><li>Third question: Does the trigger syntax for usb-to-serial port cable differ from trigger syntax for serial port? I thought they would be the same but I just want to confirm that there is no problem with the cable here. When I plugged in the cable, both receiving and main computers installed the drivers and I didn't see any warning signs saying that the cables were not working properly. <br></li></ul></div><div><br></div><div>Sorry that I am asking hundred questions at the same time. But I would greatly appreciate your help...I went through the FAQ page relating to trigger on PSTNET but they mostly seem to have helpful answers for parallel ports. </div><div><br></div><div>Thank you!</div><div>Best,</div><div>Julia Shin </div><div><br></div><div><br></div></div>
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