The key feature is the ability to adjust audio volume. An intelligent sound card may offer various ways to control volume levels, potentially through buttons, sliders, or a digital interface.
An audio mixer allows you to combine multiple audio sources. This could include microphones, instruments, or other audio inputs. Look for a mixer that suits your specific needs for audio sources and mixing capabilities.
The sound card should offer multiple input and output ports to connect various audio devices. This might include microphone inputs, instrument inputs, headphone outputs, and line outputs for speakers or recording devices.
Many modern sound cards connect to devices via USB. This provides a convenient and universal connection to computers, laptops, or other devices without the need for additional power sources.
Digital Signal Processing (DSP) features can enhance audio quality by providing effects such as reverb, equalization, or compression. An intelligent sound card may include built-in DSP capabilities for audio enhancement.