The odd/even warp selects only odd or only even harmonics from a waveform, converting a saw into a square

A sawtooth wave contains all harmonics (both odd and even). A square wave contains only odd harmonics. Serum 2’s odd/even warp applies this selection continuously: sweeping toward ‘odd’ progressively removes even harmonics until only odd harmonics remain — turning the saw into a square. Sweeping toward ‘even’ does the reverse. At center, the waveform is unmodified. This makes the warp useful for sound designers who want to morph between sawtooth and square character without switching waveforms, and for understanding the relationship between harmonic content and perceived waveform character.

Examples

Saw oscillator, odd/even warp swept fully left → sound changes to square (thinner, buzzier). Swept right → even harmonics dominate, saw doubles in apparent frequency (one octave up).

Assessment

Apply odd/even warp to a sawtooth wave. Identify by ear where the transition to square character occurs. Explain why a square wave sounds ‘hollow’ compared to a saw.