Csound includes one of the most comprehensive DSP libraries in audio programming. If you are not sure which opcode to choose for a task, explore the curated starting points below or consult the full category overviews.
Filters & Resonators
Zero-delay feedback filters, classic analog ladder models, state-variable, Butterworth, and modal filters.
Essential Opcodes:
zdf_ladder,
moogladder,
svfilter,
butterlp,
mode,
reson