Fix gains for SpikeGLX

Author: alejoe91

neo/rawio/spikeglxrawio.py

@@ -284,15 +284,15 @@ def scan_files(dirname):
                         v = meta['imroTbl'][c].split(' ')[index_imroTbl]
                         per_channel_gain[c] = 1. / float(v)
                     gain_factor = float(meta['imAiRangeMax']) / 512
-                    channel_gains = per_channel_gain * gain_factor * 1e6
+                    channel_gains = gain_factor / per_channel_gain * 1e6
                 elif meta['imDatPrb_type'] in ('21', '24') and signal_kind == 'ap':
                     # This wirk with NP 2.0 case with different metadata versions
                     # https://github.com/billkarsh/SpikeGLX/blob/gh-pages/Support/Metadata_20.md#channel-entries-by-type
                     # https://github.com/billkarsh/SpikeGLX/blob/gh-pages/Support/Metadata_20.md#imec
                     # https://github.com/billkarsh/SpikeGLX/blob/gh-pages/Support/Metadata_30.md#imec
                     per_channel_gain[:-1] = 80.
                     gain_factor = float(meta['imAiRangeMax']) / 8192
-                    channel_gains = per_channel_gain * gain_factor * 1e6
+                    channel_gains = gain_factor / per_channel_gain * 1e6
                 else:
                     raise NotImplementedError('This meta file version of spikeglx'
                                              'is not implemented')