Recording from a Cassette player to computer partial sound recording

Yesterday I downloaded Audacity 2.3.1 I successfully recorded some cassettes I had of my daughter singing and converted them to MP3 and saved them in my Google Drive. Today I am trying to record an interview with my son and it will only record his answers (very hard to hear) and not the adults asking the questions.

I am using Windows 10 and a 3.5mm male to male stereo audio aux cable. It worked perfectly yesterday.

As I did yesterday, I plugged one end of the cable into the headphone jack of the cassette player and the other end into the microphone jack of my laptop. As I stated, all worked perfectly yesterday.
Thank you for your help.

First, make sure [u]Windws “Enhancements”[/u] are DISABLED.

If these are stereo recordings you may be loosing one side, or something else might be going-wrong with the usually-mono microphone connection.

Do you have a laptop, or a desktop/tower computer with a regular soundcard? If you have a desktop/tower computer connect to line-in (color-coded blue). The mic input is not a good match for a headphone signal, although you did get good results previously.

If you have a laptop, does it have separate headphone & microphone jacks, or does it have a single combination jack? (I assume separate connections or it wouldn’t work at all with a regular 3.5mm cable.)

If you have a laptop with no line-in, you’ll probably get better results using a USB interface with line-inputs. See [u]How To connect Your Equipment[/u] and [u]USB Interfaces[/u]. (Do NOT get a regular “USB Soundcard”. They are like laptops with only mic-in and headphone-out.)