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MYTH: FIR filters always add a lot of delay and are impractical for live sound

By Nathan Lively

FACT: FIR filters have an arbitrary amount of delay based on their design, making their application flexible and practical. In this interview with Michael John from Eclipse Audio we dispel FIR filter myths and discuss what live sound engineers need to know about their application in the field. Nathan So, I definitely want to talk to you about FIR Designer and filters and stuff, but first: when you are doing listening tests, what's one of your go-to reference tracks? Michael I tend … [Read more...]

Do all-pass and FIR filters cause delay?

By Nathan Lively

For a long time I was afraid of all-pass and FIR filters because they seemed exotic and supposedly cause lots of delay, making them unusable for live sound. Turns out this was just an excuse I was using to avoid some mental hurdles. Do all-pass filters cause delay? Here's a measurement of my BLU-160. It's an output processor from BSS. Pretty boring. Here's that same measurement with 5ms of delay inserted. Let me draw your attention to the Live IR. It's the exact same shape as in … [Read more...]

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