.meta file

SpikeGLX meta file

JRCLUST can parse .meta file generated by SpikeGLX (HHMI neural recording software). SpikeGLX supports two hardware systems: NIDQ (National Instruments DAQ) or Neuropixels probe (manufactured by IMEC). The tag format differs for these two systems. The below describes meta tags relevant for JRCLUST. For more info, visit SpikeGLX Github page

Common to All Files

appVersion=20161201

fileCreateTime=2017-02-06T13:34:39

These are the local date and time on the recording machine.

fileName=C:/SGL_DATA/qqq1_g0_t0.nidq.bin

This is the original path to the binary file paired with this metadata file.

fileSHA1=B209BBB956A9F6371625C118D651DBE9AED4051D

This is a checksum calculated for the binary data. Use menu item Tools::Verify SHA1 to detect if the binary data have been altered since the file was first recorded.

fileSizeBytes=10144818

This should match what you see when you right-click on the binary file in the 'Windows File Explorer' and select 'Properties'. This is the 'Size' value, not the 'Size on disk' value.

fileTimeSecs=1.0

This is the span of the file data in seconds and is calculated as:

    fileTimeSecs = fileSizeBytes / xxSampleRate / nSavedChans / 2,
    where, xxSampleRate is the niSampleRate or imSampleRate
    recorded in the same metafile.

nSavedChans=257

The number of channels being saved to disk.

IMEC (Neuropixels probe)

acqApLfSy=384,384,1

This is the count of channels, of each type, in each timepoint, at acquisition time.

imAiRangeMax=0.6

Convert from 16-bit analog values (i) to voltages (V) as follows:

V = i * Vmax / Imax / gain.

For imec data:

Imax = 512
Vmax = imAiRangeMax
gain = imroTbl gain entry for AP or LF type.

imAiRangeMin=-0.6

imDatPrbtype=0

This is the probe type.

imSampRate=30000

~imroTbl=(0,384)(0 0 0 500 250 1)(1 0 0 500 250 1)(2 0 0 500 250 1)(3 0 0 500 250 1)(4 0 0 500 250 1)(5 0 0 500 250 1)(6 0 0 500 250 1)(7 0 0 500 250 1)(8 0 0 500 250 1)(9 0 0 500 250 1)(10 0 0 500 250 1)(11 0 0 500 250 1)(12 0 0 500 250 1)(13 0 0 500 250 1)(14 0 0 500 250 1)(15 0 0 500 250 1)(16 0 0 500 250 1)(17 0 0 500 250 1)(18 0 0 500 250 1)(19 0 0 500 250 1)(20 0 0 500 250 1)(21 0 0 500 250 1)(22 0 0 500 250 1)(23 0 0 500 250 1)(24 0 0 500 250 1)(25 0 0 500 250 1)(26 0 0 500 250 1)(27 0 0 500 250 1)(28 0 0 500 250 1)(29 0 0 500 250 1)(30 0 0 500 250 1)(31 0 0 500 250 1)(32 0 0 500 250 1)(33 0 0 500 250 1)(34 0 0 500 250 1)(35 0 0 500 250 1)(36 0 0 500 250 1)(37 0 0 500 250 1)(38 0 0 500 250 1)(39 0 0 500 250 1)(40 0 0 500 250 1)(41 0 0 500 250 1)(42 0 0 500 250 1)(43 0 0 500 250 1)(44 0 0 500 250 1)(45 0 0 500 250 1)(46 0 0 500 250 1)(47 0 0 500 250 1)(48 0 0 500 250 1)(49 0 0 500 250 1)(50 0 0 500 250 1)(51 0 0 500 250 1)(52 0 0 500 250 1)(53 0 0 500 250 1)(54 0 0 500 250 1)(55 0 0 500 250 1)(56 0 0 500 250 1)(57 0 0 500 250 1)(58 0 0 500 250 1)(59 0 0 500 250 1)(60 0 0 500 250 1)(61 0 0 500 250 1)(62 0 0 500 250 1)(63 0 0 500 250 1)(64 0 0 500 250 1)(65 0 0 500 250 1)(66 0 0 500 250 1)(67 0 0 500 250 1)(68 0 0 500 250 1)(69 0 0 500 250 1)(70 0 0 500 250 1)(71 0 0 500 250 1)(72 0 0 500 250 1)(73 0 0 500 250 1)(74 0 0 500 250 1)(75 0 0 500 250 1)(76 0 0 500 250 1)(77 0 0 500 250 1)(78 0 0 500 250 1)(79 0 0 500 250 1)(80 0 0 500 250 1)(81 0 0 500 250 1)(82 0 0 500 250 1)(83 0 0 500 250 1)(84 0 0 500 250 1)(85 0 0 500 250 1)(86 0 0 500 250 1)(87 0 0 500 250 1)(88 0 0 500 250 1)(89 0 0 500 250 1)(90 0 0 500 250 1)(91 0 0 500 250 1)(92 0 0 500 250 1)(93 0 0 500 250 1)(94 0 0 500 250 1)(95 0 0 500 250 1)(96 0 0 500 250 1)(97 0 0 500 250 1)(98 0 0 500 250 1)(99 0 0 500 250 1)(100 0 0 500 250 1)(101 0 0 500 250 1)(102 0 0 500 250 1)(103 0 0 500 250 1)(104 0 0 500 250 1)(105 0 0 500 250 1)(106 0 0 500 250 1)(107 0 0 500 250 1)(108 0 0 500 250 1)(109 0 0 500 250 1)(110 0 0 500 250 1)(111 0 0 500 250 1)(112 0 0 500 250 1)(113 0 0 500 250 1)(114 0 0 500 250 1)(115 0 0 500 250 1)(116 0 0 500 250 1)(117 0 0 500 250 1)(118 0 0 500 250 1)(119 0 0 500 250 1)(120 0 0 500 250 1)(121 0 0 500 250 1)(122 0 0 500 250 1)(123 0 0 500 250 1)(124 0 0 500 250 1)(125 0 0 500 250 1)(126 0 0 500 250 1)(127 0 0 500 250 1)(128 0 0 500 250 1)(129 0 0 500 250 1)(130 0 0 500 250 1)(131 0 0 500 250 1)(132 0 0 500 250 1)(133 0 0 500 250 1)(134 0 0 500 250 1)(135 0 0 500 250 1)(136 0 0 500 250 1)(137 0 0 500 250 1)(138 0 0 500 250 1)(139 0 0 500 250 1)(140 0 0 500 250 1)(141 0 0 500 250 1)(142 0 0 500 250 1)(143 0 0 500 250 1)(144 0 0 500 250 1)(145 0 0 500 250 1)(146 0 0 500 250 1)(147 0 0 500 250 1)(148 0 0 500 250 1)(149 0 0 500 250 1)(150 0 0 500 250 1)(151 0 0 500 250 1)(152 0 0 500 250 1)(153 0 0 500 250 1)(154 0 0 500 250 1)(155 0 0 500 250 1)(156 0 0 500 250 1)(157 0 0 500 250 1)(158 0 0 500 250 1)(159 0 0 500 250 1)(160 0 0 500 250 1)(161 0 0 500 250 1)(162 0 0 500 250 1)(163 0 0 500 250 1)(164 0 0 500 250 1)(165 0 0 500 250 1)(166 0 0 500 250 1)(167 0 0 500 250 1)(168 0 0 500 250 1)(169 0 0 500 250 1)(170 0 0 500 250 1)(171 0 0 500 250 1)(172 0 0 500 250 1)(173 0 0 500 250 1)(174 0 0 500 250 1)(175 0 0 500 250 1)(176 0 0 500 250 1)(177 0 0 500 250 1)(178 0 0 500 250 1)(179 0 0 500 250 1)(180 0 0 500 250 1)(181 0 0 500 250 1)(182 0 0 500 250 1)(183 0 0 500 250 1)(184 0 0 500 250 1)(185 0 0 500 250 1)(186 0 0 500 250 1)(187 0 0 500 250 1)(188 0 0 500 250 1)(189 0 0 500 250 1)(190 0 0 500 250 1)(191 0 0 500 250 1)(192 0 0 500 250 1)(193 0 0 500 250 1)(194 0 0 500 250 1)(195 0 0 500 250 1)(196 0 0 500 250 1)(197 0 0 500 250 1)(198 0 0 500 250 1)(199 0 0 500 250 1)(200 0 0 500 250 1)(201 0 0 500 250 1)(202 0 0 500 250 1)(203 0 0 500 250 1)(204 0 0 500 250 1)(205 0 0 500 250 1)(206 0 0 500 250 1)(207 0 0 500 250 1)(208 0 0 500 250 1)(209 0 0 500 250 1)(210 0 0 500 250 1)(211 0 0 500 250 1)(212 0 0 500 250 1)(213 0 0 500 250 1)(214 0 0 500 250 1)(215 0 0 500 250 1)(216 0 0 500 250 1)(217 0 0 500 250 1)(218 0 0 500 250 1)(219 0 0 500 250 1)(220 0 0 500 250 1)(221 0 0 500 250 1)(222 0 0 500 250 1)(223 0 0 500 250 1)(224 0 0 500 250 1)(225 0 0 500 250 1)(226 0 0 500 250 1)(227 0 0 500 250 1)(228 0 0 500 250 1)(229 0 0 500 250 1)(230 0 0 500 250 1)(231 0 0 500 250 1)(232 0 0 500 250 1)(233 0 0 500 250 1)(234 0 0 500 250 1)(235 0 0 500 250 1)(236 0 0 500 250 1)(237 0 0 500 250 1)(238 0 0 500 250 1)(239 0 0 500 250 1)(240 0 0 500 250 1)(241 0 0 500 250 1)(242 0 0 500 250 1)(243 0 0 500 250 1)(244 0 0 500 250 1)(245 0 0 500 250 1)(246 0 0 500 250 1)(247 0 0 500 250 1)(248 0 0 500 250 1)(249 0 0 500 250 1)(250 0 0 500 250 1)(251 0 0 500 250 1)(252 0 0 500 250 1)(253 0 0 500 250 1)(254 0 0 500 250 1)(255 0 0 500 250 1)(256 0 0 500 250 1)(257 0 0 500 250 1)(258 0 0 500 250 1)(259 0 0 500 250 1)(260 0 0 500 250 1)(261 0 0 500 250 1)(262 0 0 500 250 1)(263 0 0 500 250 1)(264 0 0 500 250 1)(265 0 0 500 250 1)(266 0 0 500 250 1)(267 0 0 500 250 1)(268 0 0 500 250 1)(269 0 0 500 250 1)(270 0 0 500 250 1)(271 0 0 500 250 1)(272 0 0 500 250 1)(273 0 0 500 250 1)(274 0 0 500 250 1)(275 0 0 500 250 1)(276 0 0 500 250 1)(277 0 0 500 250 1)(278 0 0 500 250 1)(279 0 0 500 250 1)(280 0 0 500 250 1)(281 0 0 500 250 1)(282 0 0 500 250 1)(283 0 0 500 250 1)(284 0 0 500 250 1)(285 0 0 500 250 1)(286 0 0 500 250 1)(287 0 0 500 250 1)(288 0 0 500 250 1)(289 0 0 500 250 1)(290 0 0 500 250 1)(291 0 0 500 250 1)(292 0 0 500 250 1)(293 0 0 500 250 1)(294 0 0 500 250 1)(295 0 0 500 250 1)(296 0 0 500 250 1)(297 0 0 500 250 1)(298 0 0 500 250 1)(299 0 0 500 250 1)(300 0 0 500 250 1)(301 0 0 500 250 1)(302 0 0 500 250 1)(303 0 0 500 250 1)(304 0 0 500 250 1)(305 0 0 500 250 1)(306 0 0 500 250 1)(307 0 0 500 250 1)(308 0 0 500 250 1)(309 0 0 500 250 1)(310 0 0 500 250 1)(311 0 0 500 250 1)(312 0 0 500 250 1)(313 0 0 500 250 1)(314 0 0 500 250 1)(315 0 0 500 250 1)(316 0 0 500 250 1)(317 0 0 500 250 1)(318 0 0 500 250 1)(319 0 0 500 250 1)(320 0 0 500 250 1)(321 0 0 500 250 1)(322 0 0 500 250 1)(323 0 0 500 250 1)(324 0 0 500 250 1)(325 0 0 500 250 1)(326 0 0 500 250 1)(327 0 0 500 250 1)(328 0 0 500 250 1)(329 0 0 500 250 1)(330 0 0 500 250 1)(331 0 0 500 250 1)(332 0 0 500 250 1)(333 0 0 500 250 1)(334 0 0 500 250 1)(335 0 0 500 250 1)(336 0 0 500 250 1)(337 0 0 500 250 1)(338 0 0 500 250 1)(339 0 0 500 250 1)(340 0 0 500 250 1)(341 0 0 500 250 1)(342 0 0 500 250 1)(343 0 0 500 250 1)(344 0 0 500 250 1)(345 0 0 500 250 1)(346 0 0 500 250 1)(347 0 0 500 250 1)(348 0 0 500 250 1)(349 0 0 500 250 1)(350 0 0 500 250 1)(351 0 0 500 250 1)(352 0 0 500 250 1)(353 0 0 500 250 1)(354 0 0 500 250 1)(355 0 0 500 250 1)(356 0 0 500 250 1)(357 0 0 500 250 1)(358 0 0 500 250 1)(359 0 0 500 250 1)(360 0 0 500 250 1)(361 0 0 500 250 1)(362 0 0 500 250 1)(363 0 0 500 250 1)(364 0 0 500 250 1)(365 0 0 500 250 1)(366 0 0 500 250 1)(367 0 0 500 250 1)(368 0 0 500 250 1)(369 0 0 500 250 1)(370 0 0 500 250 1)(371 0 0 500 250 1)(372 0 0 500 250 1)(373 0 0 500 250 1)(374 0 0 500 250 1)(375 0 0 500 250 1)(376 0 0 500 250 1)(377 0 0 500 250 1)(378 0 0 500 250 1)(379 0 0 500 250 1)(380 0 0 500 250 1)(381 0 0 500 250 1)(382 0 0 500 250 1)(383 0 0 500 250 1)

The first entry of the Imec Readout Table (imRo) is a header. Here, (0,384) indicates probe type and number of channels. Each subsequent channel entry has six values: