A customer wishes to record from a line source is unable to connect because there is no line in jack connection.
The SensePlayer does not have a dedicated line in jack socket, however it is able to make recordings from line sources when used with a USB C audio adaptor (not included). The following a representative example of USB C audio products that can be used to record line level signals.
For basic line-in recording there are many varieties of simple USB C to 3.5mm adaptors of which Anker device linked below is a representitive sample:
Further information:
https://www.amazon.co.uk/Anker-Adapter-Female-Samsung-Devices/dp/B08Z3B5QL3/ref=sr_1_3?keywords=usb+c+to+3.5mm&qid=1677846181&sr=8-3
Intended more serious speech based applications is this item demonstrated with SensePlayer by HIMS (link here: https://youtu.be/OCDpSb3xqqM). The item features high quality external microphone for speech/instrument recording. It also features 6.3mm instrrument and 3.5 mm line in connections.