# Musician EKG ![EMG Placement, photo by Caroline Bittencourt][1] ## Description EKG data was collected using Delsys EKG biofeedback sensors ([Sensor Details][2]). One wireless sensor will be attached to the torso of each of the DSQ members prior to both the morning experiment the concert. Sensors are battery powered and were charged fully before beginning setup. Each sensor streams data live to the base unit and into the capture computer at a specified frame rate. ## Collection Strategy ### Equipment Delsys Trigno EKG Biofeedback Sensor with associated laptop for running EMGWorks data aquisition software. The laptop was connected to the Delsys base unit to receive the live streaming data. ### Data EKG and accelerometry data was collected from each of the four sensors. - Format: CSV files - Settings: 1926 sa/sec ### Method Each participant (Violin I, Violin II, Viola, Cello) wore an EKG sensor on their chest during the morning experiment and evening concert. The EKG sensors consist of a main sensor body with 2 cabled detection leads which clip to snap electrodes, the two cabled electrodes were placed parallel to each other under the pectoral muscles, with the shorter cabled electrode (negative side) positioned on the side close to the heart. ![Delsys EKG diagram][3] All sensors were cleaned with alcohol wipes before the experiment, and the wires and sensors’ body were secured with medical tape to reduce noise from movement. Timestamps of different tracks are documented and EKG recording paused between tracks and experiment conditions to be used for data management. All EKG data was transmitted to the associated laptop in real time via Delsys base station. ### Data Quality We ensured that noise in the EKG signal was avoided as much as possible by cleaning the electrodes and fixing the wires several times during the experiment. We verified all the EKG data through the Python NeuroKit2 toolbox, to ensure that cardiac activity information can be extracted. In summary, EKG data are of perfect quality in the morning experiments. In the night concert data, the violin I, II and cello data are perfect, while the viola EKG data is noisy and has some data loss. ### File Naming CSV files were named by experimental condition and sequentially. Included is the timestamps for each file start and finish. #### Morning Experiment: - MLC_DelsysEKG_morningbaselinetest_raw 10:55:05 - 11:58:05 - MLC_DelsysEKG_morningcondition1_raw 11:00:09 - 11:00:46 - MLC_DelsysEKG_morningcondition2_raw 11:03:57 - 11:06:25 - MLC_DelsysEKG_morningcondition3_raw 11:09:01 - 11:11:36 - MLC_DelsysEKG_morningcondition4_raw 11:12:29 - 11:15:04 - MLC_DelsysEKG_morningcondition5_raw 11:19:43 - 11:22:14 - MLC_DelsysEKG_morningcondition6_raw 11:23:32 - 11:26:02 - MLC_DelsysEKG_morningcondition7_raw 11:28:25 - 11:33:03 - MLC_DelsysEKG_morningcondition8_raw 11:38:40 - 11:45:19 - MLC_DelsysEKG_morningcondition9_raw 12:16:04 - 12:28:28 #### Concert: - MLC_DelsysEKG_concertmusic1_raw 19:48:41 - 20:14:56 - MLC_DelsysEKG_concertmusic2_raw 20:21:33 - 20:42:50 - MLC_DelsysEKG_concertmusic3_raw 21:14:27 - 21:28:28 - MLC_DelsysEKG_concertmusic4_raw 21:32:14 - 21:40:46 - MLC_DelsysEKG_concertmusic5_raw 21:40:58 - 21:43:58 - MLC_DelsysEKG_concertmusic6_raw 21:44:07 - 21:48:01 - MLC_DelsysEKG_concertmusic7_raw 21:48:15 - 21:53:54 - MLC_DelsysEKG_concertmusic8_raw 21:54:11 - 21:57:13 - MLC_DelsysEKG_concertmusic9_raw 21:58:43 - 22:02:26 [1]: https://www.uio.no/ritmo/english/news-and-events/events/musiclab/2021/dsq/photos/bittencourt/dsq-festival-2021-by-caroline-bittencourt-17.jpg "EMG Placement photo by Caroline Bittencourt" [2]: https://delsys.com/trigno-ekg-biofeedback/ "Sensor Details" [3]: https://delsys.com/wp-content/uploads/2021/04/how-it-trigno_ekg-800x801.png "Delsys EKG Diagram"