4 ms·
FWIW, you don't need to run forwards and backwards to get linear phase. Any symmetric FIR filter will do.
by Sesse__ 1y ago
FWIW, you don't need to run forwards and backwards to get linear phase. Any symmetric FIR filter will do.
- rcxdude 1y agoYeah, there's a difference between linear phase (which you can achieve with a causal filter, i.e. one that is running in real-time) and constant-phase, which requires that you have more or less the whole signal before you filter it (you can approximate it to the extent you're willing to add more latency).
- atoav 1y agoGood addition. I mentioned the forward/backward bit as this was a way to achieve linear phase in analog times eith more conventional filters (although the cost here was even higher with the additional added noise floor due to tape noise ad the extra work involved).