OpenViBE forum

Hi I am attempting to set up an auditory oddball experiment. At the moment I am using the clock stimulator and a lua stimulator connected to sound boxes (one with the standard and one with the deviant). However I am unable to figure out how to create jittered stimulation times with this setup. Are there clock scripts that will permit me to create controlled jitter in the stimulation intervals (or randomization of the interval times)? Does anyone have a script that you could share that permits the clock generator to produce variable intervals?

I also tried running the lua stimulator on its own, without the clock stimulator, but I don't think this will work ( except for creating an additional clock inside the script) because the lua stimulator gets no feedback from the players about the end of the sound files.

Any help or example lua scripts or clock scripts would be much appreciated! (I'm not sure how to attach the xml file that contains my openvibe scenario, but I've copied the code below if its of any help)

Best,
Erin Allen


<OpenViBE-Scenario>
<Boxes>
<Box>
<Identifier>(0x00000a6e, 0x0000673d)</Identifier>
<Name>Sound Player</Name>
<AlgorithmClassIdentifier>(0x7ac2396f, 0x7ee52efe)</AlgorithmClassIdentifier>
<Inputs>
<Input>
<TypeIdentifier>(0x6f752dd0, 0x082a321e)</TypeIdentifier>
<Name>Input triggers</Name>
</Input>
</Inputs>
<Outputs>
<Output>
<TypeIdentifier>(0x6f752dd0, 0x082a321e)</TypeIdentifier>
<Name>Resync triggers</Name>
</Output>
</Outputs>
<Settings>
<Setting>
<TypeIdentifier>(0x2c132d6e, 0x44ab0d97)</TypeIdentifier>
<Name>PLAY trigger</Name>
<DefaultValue>OVTK_StimulationId_Label_00</DefaultValue>
<Value>OVTK_StimulationId_Label_01</Value>
</Setting>
<Setting>
<TypeIdentifier>(0x2c132d6e, 0x44ab0d97)</TypeIdentifier>
<Name>STOP trigger</Name>
<DefaultValue>OVTK_StimulationId_Label_01</DefaultValue>
<Value>OVTK_StimulationId_EndOfFile</Value>
</Setting>
<Setting>
<TypeIdentifier>(0x330306dd, 0x74a95f98)</TypeIdentifier>
<Name>File to play</Name>
<DefaultValue>${Path_Data}/plugins/stimulation/ov_beep.wav</DefaultValue>
<Value>C:/Program Files (x86)/openvibe/Audio/Low WoodBlock.wav</Value>
</Setting>
<Setting>
<TypeIdentifier>(0x2cdb2f0b, 0x12f231ea)</TypeIdentifier>
<Name>Loop</Name>
<DefaultValue>False</DefaultValue>
<Value>False</Value>
</Setting>
</Settings>
<Attributes>
<Attribute>
<Identifier>(0x1fa7a38f, 0x54edbe0b)</Identifier>
<Value>192</Value>
</Attribute>
<Attribute>
<Identifier>(0x1fa963f5, 0x1a638cd4)</Identifier>
<Value>23</Value>
</Attribute>
<Attribute>
<Identifier>(0x207c9054, 0x3c841b63)</Identifier>
<Value>400</Value>
</Attribute>
<Attribute>
<Identifier>(0x4e7b798a, 0x183beafb)</Identifier>
<Value>(0xd327e20a, 0xaae6b1f8)</Value>
</Attribute>
<Attribute>
<Identifier>(0xad100179, 0xa3c984ab)</Identifier>
<Value>84</Value>
</Attribute>
<Attribute>
<Identifier>(0xc73e83ec, 0xf855c5bc)</Identifier>
<Value>false</Value>
</Attribute>
<Attribute>
<Identifier>(0xc80ce8af, 0xf699f813)</Identifier>
<Value>1</Value>
</Attribute>
<Attribute>
<Identifier>(0xce18836a, 0x9c0eb403)</Identifier>
<Value>4</Value>
</Attribute>
<Attribute>
<Identifier>(0xcfad85b0, 0x7c6d841c)</Identifier>
<Value>1</Value>
</Attribute>
</Attributes>
</Box>
<Box>
<Identifier>(0x00002015, 0x00005db9)</Identifier>
<Name>Keyboard stimulator</Name>
<AlgorithmClassIdentifier>(0x00d317b9, 0x6324c3ff)</AlgorithmClassIdentifier>
<Outputs>
<Output>
<TypeIdentifier>(0x6f752dd0, 0x082a321e)</TypeIdentifier>
<Name>Outgoing Stimulations</Name>
</Output>
</Outputs>
<Settings>
<Setting>
<TypeIdentifier>(0x330306dd, 0x74a95f98)</TypeIdentifier>
<Name>Filename</Name>
<DefaultValue>../share/openvibe-plugins/stimulation/simple-keyboard-to-stimulations.txt</DefaultValue>
<Value>C:/Alez/eeglike/simple-keyboard-to-stimulations.txt</Value>
</Setting>
</Settings>
<Attributes>
<Attribute>
<Identifier>(0x1fa7a38f, 0x54edbe0b)</Identifier>
<Value>96</Value>
</Attribute>
<Attribute>
<Identifier>(0x1fa963f5, 0x1a638cd4)</Identifier>
<Value>23</Value>
</Attribute>
<Attribute>
<Identifier>(0x207c9054, 0x3c841b63)</Identifier>
<Value>112</Value>
</Attribute>
<Attribute>
<Identifier>(0x4e7b798a, 0x183beafb)</Identifier>
<Value>(0x8d89d3b7, 0x8339d210)</Value>
</Attribute>
<Attribute>
<Identifier>(0xad100179, 0xa3c984ab)</Identifier>
<Value>126</Value>
</Attribute>
<Attribute>
<Identifier>(0xc80ce8af, 0xf699f813)</Identifier>
<Value>1</Value>
</Attribute>
<Attribute>
<Identifier>(0xce18836a, 0x9c0eb403)</Identifier>
<Value>1</Value>
</Attribute>
</Attributes>
</Box>
<Box>
<Identifier>(0x0000275b, 0x00004963)</Identifier>
<Name>Lua Stimulator</Name>
<AlgorithmClassIdentifier>(0x0b5a2787, 0x02750621)</AlgorithmClassIdentifier>
<Inputs>
<Input>
<TypeIdentifier>(0x6f752dd0, 0x082a321e)</TypeIdentifier>
<Name>New input</Name>
</Input>
</Inputs>
<Outputs>
<Output>
<TypeIdentifier>(0x6f752dd0, 0x082a321e)</TypeIdentifier>
<Name>Stimulations</Name>
</Output>
</Outputs>
<Settings>
<Setting>
<TypeIdentifier>(0xb0d0db45, 0x49cbc34a)</TypeIdentifier>
<Name>Lua Script</Name>
<DefaultValue></DefaultValue>
<Value>C:/Program Files (x86)/openvibe/openvibe_oddball/oddball2.lua</Value>
</Setting>
</Settings>
<Attributes>
<Attribute>
<Identifier>(0x17ee7c08, 0x94c14893)</Identifier>
<Value></Value>
</Attribute>
<Attribute>
<Identifier>(0x1fa7a38f, 0x54edbe0b)</Identifier>
<Value>112</Value>
</Attribute>
<Attribute>
<Identifier>(0x1fa963f5, 0x1a638cd4)</Identifier>
<Value>34</Value>
</Attribute>
<Attribute>
<Identifier>(0x207c9054, 0x3c841b63)</Identifier>
<Value>256</Value>
</Attribute>
<Attribute>
<Identifier>(0x4e7b798a, 0x183beafb)</Identifier>
<Value>(0xd6e3f48b, 0xbee3523a)</Value>
</Attribute>
<Attribute>
<Identifier>(0x61d11811, 0x71e65362)</Identifier>
<Value></Value>
</Attribute>
<Attribute>
<Identifier>(0xad100179, 0xa3c984ab)</Identifier>
<Value>93</Value>
</Attribute>
<Attribute>
<Identifier>(0xc80ce8af, 0xf699f813)</Identifier>
<Value>1</Value>
</Attribute>
<Attribute>
<Identifier>(0xce18836a, 0x9c0eb403)</Identifier>
<Value>1</Value>
</Attribute>
<Attribute>
<Identifier>(0xf191c1c8, 0xa0123976)</Identifier>
<Value></Value>
</Attribute>
<Attribute>
<Identifier>(0xfba64161, 0x65304e21)</Identifier>
<Value></Value>
</Attribute>
</Attributes>
</Box>
<Box>
<Identifier>(0x00004ef7, 0x000021ec)</Identifier>
<Name>Clock stimulator</Name>
<AlgorithmClassIdentifier>(0x4f756d3f, 0x29ff0b96)</AlgorithmClassIdentifier>
<Outputs>
<Output>
<TypeIdentifier>(0x6f752dd0, 0x082a321e)</TypeIdentifier>
<Name>Generated stimulations</Name>
</Output>
</Outputs>
<Settings>
<Setting>
<TypeIdentifier>(0x512a166f, 0x5c3ef83f)</TypeIdentifier>
<Name>Interstimulation interval (in sec)</Name>
<DefaultValue>1.0</DefaultValue>
<Value>4.0</Value>
</Setting>
<Setting>
<TypeIdentifier>(0x2c132d6e, 0x44ab0d97)</TypeIdentifier>
<Name>Stimulation</Name>
<DefaultValue>OVTK_StimulationId_Label_00</DefaultValue>
<Value>OVTK_StimulationId_Label_01</Value>
</Setting>
</Settings>
<Attributes>
<Attribute>
<Identifier>(0x1fa7a38f, 0x54edbe0b)</Identifier>
<Value>64</Value>
</Attribute>
<Attribute>
<Identifier>(0x1fa963f5, 0x1a638cd4)</Identifier>
<Value>23</Value>
</Attribute>
<Attribute>
<Identifier>(0x207c9054, 0x3c841b63)</Identifier>
<Value>256</Value>
</Attribute>
<Attribute>
<Identifier>(0x4e7b798a, 0x183beafb)</Identifier>
<Value>(0x27b3ee3c, 0xc50527e6)</Value>
</Attribute>
<Attribute>
<Identifier>(0xad100179, 0xa3c984ab)</Identifier>
<Value>102</Value>
</Attribute>
<Attribute>
<Identifier>(0xc80ce8af, 0xf699f813)</Identifier>
<Value>1</Value>
</Attribute>
<Attribute>
<Identifier>(0xce18836a, 0x9c0eb403)</Identifier>
<Value>2</Value>
</Attribute>
</Attributes>
</Box>
<Box>
<Identifier>(0x00005b60, 0x00003d90)</Identifier>
<Name>Stimulation multiplexer</Name>
<AlgorithmClassIdentifier>(0x07db4efa, 0x472b0938)</AlgorithmClassIdentifier>
<Inputs>
<Input>
<TypeIdentifier>(0x6f752dd0, 0x082a321e)</TypeIdentifier>
<Name>Input stimulations 1</Name>
</Input>
<Input>
<TypeIdentifier>(0x6f752dd0, 0x082a321e)</TypeIdentifier>
<Name>Input stimulations 2</Name>
</Input>
</Inputs>
<Outputs>
<Output>
<TypeIdentifier>(0x6f752dd0, 0x082a321e)</TypeIdentifier>
<Name>Multiplexed stimulations</Name>
</Output>
</Outputs>
<Attributes>
<Attribute>
<Identifier>(0x1fa7a38f, 0x54edbe0b)</Identifier>
<Value>224</Value>
</Attribute>
<Attribute>
<Identifier>(0x1fa963f5, 0x1a638cd4)</Identifier>
<Value>34</Value>
</Attribute>
<Attribute>
<Identifier>(0x207c9054, 0x3c841b63)</Identifier>
<Value>128</Value>
</Attribute>
<Attribute>
<Identifier>(0x4e7b798a, 0x183beafb)</Identifier>
<Value>(0xd5da9c1d, 0x1cc7dbf9)</Value>
</Attribute>
<Attribute>
<Identifier>(0xad100179, 0xa3c984ab)</Identifier>
<Value>117</Value>
</Attribute>
<Attribute>
<Identifier>(0xc80ce8af, 0xf699f813)</Identifier>
<Value>1</Value>
</Attribute>
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<Identifier>(0xcfad85b0, 0x7c6d841c)</Identifier>
<Value>2</Value>
</Attribute>
<Attribute>
<Identifier>(0xfba64161, 0x65304e21)</Identifier>
<Value></Value>
</Attribute>
</Attributes>
</Box>
<Box>
<Identifier>(0x000064e0, 0x000015e2)</Identifier>
<Name>Sound Player</Name>
<AlgorithmClassIdentifier>(0x7ac2396f, 0x7ee52efe)</AlgorithmClassIdentifier>
<Inputs>
<Input>
<TypeIdentifier>(0x6f752dd0, 0x082a321e)</TypeIdentifier>
<Name>Input triggers</Name>
</Input>
</Inputs>
<Outputs>
<Output>
<TypeIdentifier>(0x6f752dd0, 0x082a321e)</TypeIdentifier>
<Name>Resync triggers</Name>
</Output>
</Outputs>
<Settings>
<Setting>
<TypeIdentifier>(0x2c132d6e, 0x44ab0d97)</TypeIdentifier>
<Name>PLAY trigger</Name>
<DefaultValue>OVTK_StimulationId_Label_00</DefaultValue>
<Value>OVTK_StimulationId_Label_02</Value>
</Setting>
<Setting>
<TypeIdentifier>(0x2c132d6e, 0x44ab0d97)</TypeIdentifier>
<Name>STOP trigger</Name>
<DefaultValue>OVTK_StimulationId_Label_01</DefaultValue>
<Value>OVTK_StimulationId_Label_00</Value>
</Setting>
<Setting>
<TypeIdentifier>(0x330306dd, 0x74a95f98)</TypeIdentifier>
<Name>File to play</Name>
<DefaultValue>${Path_Data}/plugins/stimulation/ov_beep.wav</DefaultValue>
<Value>C:/Program Files (x86)/openvibe/Audio/QuintoM2R.wav</Value>
</Setting>
<Setting>
<TypeIdentifier>(0x2cdb2f0b, 0x12f231ea)</TypeIdentifier>
<Name>Loop</Name>
<DefaultValue>False</DefaultValue>
<Value>False</Value>
</Setting>
</Settings>
<Attributes>
<Attribute>
<Identifier>(0x1fa7a38f, 0x54edbe0b)</Identifier>
<Value>192</Value>
</Attribute>
<Attribute>
<Identifier>(0x1fa963f5, 0x1a638cd4)</Identifier>
<Value>23</Value>
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<Attribute>
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<Value>304</Value>
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<Name>Sound Player</Name>
<AlgorithmClassIdentifier>(0x7ac2396f, 0x7ee52efe)</AlgorithmClassIdentifier>
<Inputs>
<Input>
<TypeIdentifier>(0x6f752dd0, 0x082a321e)</TypeIdentifier>
<Name>Input triggers</Name>
</Input>
</Inputs>
<Outputs>
<Output>
<TypeIdentifier>(0x6f752dd0, 0x082a321e)</TypeIdentifier>
<Name>Resync triggers</Name>
</Output>
</Outputs>
<Settings>
<Setting>
<TypeIdentifier>(0x2c132d6e, 0x44ab0d97)</TypeIdentifier>
<Name>PLAY trigger</Name>
<DefaultValue>OVTK_StimulationId_Label_00</DefaultValue>
<Value>OVTK_StimulationId_Label_03</Value>
</Setting>
<Setting>
<TypeIdentifier>(0x2c132d6e, 0x44ab0d97)</TypeIdentifier>
<Name>STOP trigger</Name>
<DefaultValue>OVTK_StimulationId_Label_01</DefaultValue>
<Value>OVTK_StimulationId_EndOfFile</Value>
</Setting>
<Setting>
<TypeIdentifier>(0x330306dd, 0x74a95f98)</TypeIdentifier>
<Name>File to play</Name>
<DefaultValue>${Path_Data}/plugins/stimulation/ov_beep.wav</DefaultValue>
<Value>C:/Program Files (x86)/openvibe/Audio/Taiko drum.wav</Value>
</Setting>
<Setting>
<TypeIdentifier>(0x2cdb2f0b, 0x12f231ea)</TypeIdentifier>
<Name>Loop</Name>
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<Value>False</Value>
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Hi,
1. I need to run a sound file with different beep with openBCI signal using openVibe. I want to do P300 auditory test.
2. How can I get/edit a .wav file with different beep.

Please help by replying My email: ra75763@uga.edu

Rafia

Hi,
I'm not sure I understand completely, do you want to provoke pseudo-random stimulation? I have an example of file lua to launch stimulations with a predefined interval but in the absolute you can insert your algo of pseudo-random (I do not know very well the language lua on the other hand. ^^)

Lua script https://github.com/tmonseigne/NEUROPERF ... seline.lua
A Scenario who use this script https://github.com/tmonseigne/NEUROPERF ... ibrage.xml
Thibaut