The final safety net — a 48-tap Kaiser-windowed sinc interpolation filter at 4x oversampling that catches inter-sample peaks invisible to standard limiters, preventing D/A converter clipping and lossy codec distortion.
Digital audio samples represent discrete points. Between these points, the reconstructed analog waveform can exceed 0 dBFS by several dB. These inter-sample peaks are invisible to standard sample-peak meters but cause real distortion in D/A converters and lossy encoders. TruePeak Guard catches them all with a 48-tap Kaiser-windowed sinc filter running at 4x oversampling.
A standard limiter sees sample values. But when a D/A converter reconstructs the analog waveform using sinc interpolation, the curve between samples can exceed the digital ceiling. This is especially problematic after lossy encoding (AAC, MP3) which adds its own inter-sample peaks. TruePeak Guard uses the same mathematics as the converter itself to predict and prevent these overages.
Positioned after shaping (stage 12) and before the final output. Any peaks introduced by saturation or clipping are caught here. Guarantees a 0 dBTP output ceiling for streaming platform compliance (Spotify, Apple Music, YouTube) and broadcast regulatory standards. This is where absolute delivery certainty begins.
The peak protection that catches what others miss — your final guarantee of clean delivery.