HL-DSP-Suite includes HLHost (HLH) which can host any audio plugin, HLConvolver (HLC) as a convolution plugin, HLC as a standalone application that can run headless and be accessed via a web interface, and HLC Web API for custom control over HLC. HLC is a specially designed stereo and multichannel convolver to compare "level matched" convolution filters in real time with “instant switching” between filters.