TRS sockets are three-part audio jacks, usually used for headphones or audio equipment. TRS stands for Tip, Ring, and Sleeve.
The tip is the front part, transmitting the left channel of the audio signal.
The ring is behind the tip and transmits the right channel signal.
The sleeve is the outermost part, usually the ground wire.
Its common uses include:
Stereo: On the headphone jack, the left and right channels of audio are transmitted through this TRS jack.
Balanced signal: On some professional audio equipment, TRS is used to transmit cleaner, higher quality audio signals and reduce noise.
In general, TRS sockets are used to connect stereo headphones or transmit professional audio signals.
TRS sockets usually include 3.5mm, 6.35mm, and XLR connectors. The main differences between these TRS sockets are size, whether they have switches, and their applications. Different devices and scenarios will use different types of TRS sockets.

