All items tagged with filter and audio (21)

10-03-2026 | This modular Linkwitz–Riley active crossover delivers 4th-order filtering for stereo speakers and optional mono subwoofer summing. Built aro...

9-07-2025 | Watch this new episode and learn about clever circuits, engineering techniques, and design hacks. We dive into 3D printing to RF, with hands...

1-07-2025 | Last year, we published a high-quality, variable-frequency audio notch filter. To complete a typical test lab setup for measuring audio equi...

10-03-2025 | Back in 2024, we introduced a high-quality variable-frequency audio notch filter. Now, we present a high-performance audio frequency generat...

1-09-2024 | When measuring distortion in audio devices, it makes sense to filter out the controlling sinusoidal signal before the spectrum analyzer. Thi...

1-01-2023 | This article describes a simple tunable filter circuit that needs no special chips, just two op-amps that can be running from a 5-V single s...

17-04-2018 | Besides small SUVs, crossovers are also filters used in audio to divide the audio signal into two or more frequency bands. A typical example...

1-10-2007 | When listening to your favourite CD, any audiophile will at some occasion realise that the CD concerned used to sound better during the prev...

1-07-2002 | In the ‘Audio Limiter (for DVD)’ circuit, the peak values of the audio signals are used to reduce the dynamic range of the sound. A possible...

1-03-2002 | Add two op-amps to a Wien-Robinson bridge and we can construct a notch filter whose centre frequency can be set using a single resistor. Thi...