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Gain calculation for Neuropixel 2.0 might be wrong #1363

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merged 2 commits into from
Jan 29, 2024
Merged

Gain calculation for Neuropixel 2.0 might be wrong #1363

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58b4ef7
Use imMaxInt to calculate spikeglx imec gain factor
guptadivyansh Dec 12, 2023
7b1074b
use imChan0apGain to set spikeglx imec gain
guptadivyansh Dec 12, 2023
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8 changes: 6 additions & 2 deletions neo/rawio/spikeglxrawio.py
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Original file line number Diff line number Diff line change
Expand Up @@ -408,8 +408,12 @@ def extract_stream_info(meta_file, meta):
# https://github.com/billkarsh/SpikeGLX/blob/15ec8898e17829f9f08c226bf04f46281f106e5f/Markdown/Metadata_30.md#imec
# We allow also LF streams for NP2.0 because CatGT can produce them
# See: https://github.com/SpikeInterface/spikeinterface/issues/1949
per_channel_gain[:-1] = 1 / 80.
gain_factor = float(meta['imAiRangeMax']) / 8192
if 'imChan0apGain' in meta:
per_channel_gain[:-1] = 1 / float(meta['imChan0apGain'])
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else:
per_channel_gain[:-1] = 1 / 80.
max_int = int(meta['imMaxInt']) if 'imMaxInt' in meta else 8192
gain_factor = float(meta['imAiRangeMax']) / max_int
channel_gains = gain_factor * per_channel_gain * 1e6
else:
raise NotImplementedError('This meta file version of spikeglx'
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