Accessing the sound card in LCC for Windows XP 32-bit involves using sound libraries or OS APIs, as programming at the IO level can be complex for beginners. Recommended libraries include DirectSound, which may require Visual C++, and cross-platform options like OpenAL, which is user-friendly. FMOD and BASS are also suggested as alternatives for sound processing. The goal is to capture sound intensity from a microphone, process it, and output it to speakers. Resources such as CodeProject provide additional examples and information for implementing these solutions.