MIA Border

MIA Border is a filter effect from MIA Laboratories that combines second-order Butterworth low-pass and high-pass filtering. Designed for general-purpose frequency cleanup, it helps you remove unwanted low and high frequencies with a smooth response and analogue character. Use the high-pass filter to reduce unnecessary low-end content, or the low-pass filter to soften excess top end and give a sound a darker tonal balance. Together, they offer a straightforward way to narrow a signal’s frequency range and help it sit more comfortably in a mix. Border suits hobby producers looking for smooth filtering rather than elaborate tone-shaping tools. Whether you’re tidying up individual tracks or adjusting the overall character of a sound, its focus is on useful frequency control with a gentle sonic feel.