I have started to play with FIR’s I am currently not thinking about the maths... just using Rephase
. I can unstuck yesterday evening when I realised the Nadja needs an equation on the input .. otherwise no signal gets through to the channels. Currently I have written simple LR linear phase crossovers, for trial. For the input equation which is basically a pass through equation I generated an equation that does nothing, giving it an arbitrary 100 nodes. There must be a better way of defining pass through, but my brain currently cannot cope with generating the maths. Any ideas/experience? The Nadja was hitting DSP overload on the simple crossovers I defined, I may have added too many nodes, as no ringing was detected on measurement. Sound not bad - something’s better something worse from a SQ perspective, it’s the 48k sampling probably. I know I prefer 96k over 48k and 192k with IIR filters.
The fun may begin next week... I have a second Nadja I have acquired - primarily as a spare, but I need to work out how I can synchronise the clocks on each board, so I can run one for each channel, doubling my fir capability. Still woeful though. I have seen that you can get programmable effects pedals with 68000 nodes - reasonably cheap, so that could be an approach for those without a Lake or DEQX who don’t want a PC in their music chain.