It is both input or output
The sound card of a computer provides an output - speaker or headphone) and usually an input too - microphone.The card itself is not an output but is an I/O device(input output device) [a bit of semantics here].
A Microphone does not output sound. It accepts sound. It is an input device.
No input sound is microphone output sound is speaker
Sound card also known as audio card is the main hardware for computer's input and output of sound. The sound card as stated can receive and transmit the sound but have to have audio speakers attached to the card. As for the input you can connect a microphone and another source of sound (tv, music system, etc).
INPUT
output
I expect you mean "Is Card reader/writer input or output?". If this is so, it is both an input and output device. Whenever you are trying to categorize a device as Input or Output, think of how it looks from the computer.If the computer is transmitting data to it, it is an Output device.If the computer is receiving data from it, it is an Input device.
Because it outputs sound to speakers or headphones, but takes in sound through a microphone or other auxiliary source, if you have one.
An audio port on a computer allows for the input and output of sound. It usually is an external connector that is internally connected to the motherboard or sound card.
Input is electricity and output is sound, heat and light.
Input I would have thought.If you are refering to the big readers of the 80-column punched card then they are Input devices. But many of these devices were made so that they could also be used for output - ie for punching cards - these are both Input and Output devices.A card reader is an INPUT (not imput) device.Whenever you are trying to categorize a device as Input or Output, think of how it looks from the computer.If the computer is transmitting data to it, it is an Output device.If the computer is receiving data from it, it is an Input device.
A sound-card is an output device. It takes digital information from the computer and turns it into an analogue signal that is sent to the computers speakers or headphone socket. Most sound cards today also have a microphone socket and convert sound to digital signals for processing (eg for SKYPE or recording music). This is an Input device. Some sound cards can only process either In or Out, not both at the same time, most modern cards can do both simultaneously - a requirement for SKYPE usage.