These claves were sampled in stereo at four velocity levels. The original pitch is set to middle C, and each adjacent key changes the pitch by only 20 cents instead of the more usual half step. This way you can vary the pitch by smaller increments. The microphones were placed a few feet away from the claves in my large live room to capture nice ambience. Further, the decay and release times are programmed to let you control the ambience during playback. With very short note lengths the sound fades out before the ambience can be heard. But holding the key longer lets the note decay more naturally, making the ambience more pronounced.